研究论文

• Effects of Root Pruning and Shoot Pruning on Water Use Efficiency of AppleLeaves
• Yang Hongqiang;Jie Yuling;Zhang Lianzhong;Cui Minggang;and Luo Xinshu
• Acta Horticulturae Sinica. 2002, 29(3): 197-202.
• Abstract ( 1374 ) HTML ( 1223 ) PDF (243KB) ( 1223 ) 　　　
• The effect of root pruning and shoot pruning on net photosynthetic rate ( Pn) , transpiration rate (Tr) , stomatal conductance (Gs) , leaf water use efficiency (WUE) , and the reason causing the changes in WUE were explored in potted five2year old apple (Malus pumila Mill/ Malus hupenensis Rhed) trees. The results showed that root pruning increased WUE obviously from the second day to the 42th day after treatment . In the mean time ,
  Tr and Gs decreased obviously , but Pn and carboxylation efficiency (CE) recovered rapidly and was higher than control on the seventh day of treatment . The total number of new roots and the concentration of zeatin riboside (ZR) in leaf restored to the control level after 28 days of treatment . Shoot pruning increased Pn、CE、Tr 、Gs and the concentration of ZR , but WUE heighten a little over control after 28 days of treatment . Pn、CE、Tr and Gs all decreased on the second day after both root and shoot pruning , then on the 21th day , Pn and CEwas higher than control , Tr and Gs went up to the control level , so the WUE had a little rise in the late stage of treatment . It is proposed that root pruning increased WUE by decreasing Gs significantly and shoot pruning increased WUE by increasing CE.
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• Identification of Main Pigments in Red Flesh Navel Orange (Citrus sinensis L.) and Evaluation of Their Concentration Changes during Fruit Development andStorage
• Xu Juan and Deng Xiuxin
• Acta Horticulturae Sinica. 2002, 29(3): 203-208.
• Abstract ( 1602 ) HTML ( 1425 ) PDF (239KB) ( 1425 ) 　　　
• In this article , two main pigments lycopene andβ2carotene were identified in Red flesh navel orange by using Thin Layer Chromatography and PAD combined with HPLC , its red flesh was pigmented by lycopene which
  made up to 55. 36 % - 58. 49 %of the total peak area (counted in peak area of solvent) , whereasβ2carotene held 18. 12 % - 19. 93 %. Using Reverse-phase HPLC , standard curves of authentic lycopene and β-carotene were obtained and then be applied to calculate concentration changes of pigments during fruit development and storage under room temperature. Results showed that concentration of carotenoids was the highest at ripening time (lycopene was up to 109. 67μg·g^-1 of dry mass , and β-carotene as much as 15. 52μg·g^-1) , after harvest , a tendency of decreasing in pigments was easy to be seen , but there was also a significant increase appeared in Jan. 16th. After 4 months of storage , concentration of carotenoids reached the lowest among all investigated periods.
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• The Relationship of H₂O₂ Content Changes in Buds with the Endodormancy ofFruit Trees
• Gao Dongsheng;Shu Huairui;and Li Xianli
• Acta Horticulturae Sinica. 2002, 29(3): 209-213.
• Abstract ( 1409 ) HTML ( 1284 ) PDF (191KB) ( 1284 ) 　　　
• Changes of H₂O₂ content in buds associated with the endodormancy of some stone fruit tree and grape cultivars were studied. The results indicated that the H₂O₂ contents of dormancy buds were different due to different tree species and cult ivars. The trend was that H₂O₂ content of late􀀁maturing cultivars was higher than that of early maturing cultivars, and H₂O₂ content in flower bud was higher than that of vegetative bud; but grape cultivars were reverse. Dynamic state of H₂O₂ content in dormancy bud took on a trend of rising steadily in earlier stage and dropping quickly in later stage. The time which the H₂O₂ content dropped sharply was consistent with the
  t ime of endodormancy release. Temperature affected the dormant bud H₂O₂ content : low temperature (5 ℃) obviously raised the H2O2 content , middle temperature (10 ℃) only raised the H₂O₂ content slightly, but high
  temperature (20 ℃) lead to the drop of the H₂O₂ content. Spraying regulators of ABA ( 50 mg.L^-1) obviously raised the H₂O₂ content of dormant bud, however, 100 mg.L^-1 GA₃ and 6-BA reduced the H₂O₂ content. Chemicals of dormancy release of thiourea and KNO₃ had obvious effects on H₂O₂ content of stone fruits, CaCN₂ had no effect on stone fruit trees but affected the H₂O₂ content of grape cultivars.
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• Effects of Cold Shock Treatment on Softening of Postharvest Banana and Some Related Enzymes Activities
• Duan Xuewu;Pang Xuequn;Zhang Zhaoqi;and Ji Zuoliang
• Acta Horticulturae Sinica. 2002, 29(3): 214-217.
• Abstract ( 1687 ) HTML ( 1249 ) PDF (185KB) ( 1249 ) 　　　
• The effect of cold shock treatment on softening of postharvcest‘Baxi’bananas was investigated. The results showed that the treatment of - 2-0 ℃ cold air for 2. 5 h significantly delayed fruit softening. Cold shock treatment inhibited the activities of polygalacturonase and amylase , and delayed the degradations of pectin and starch which resulted in a delay in fruit softening and a maintainance of fruit firmness. However , cold shock treatment did not affect the pectinesterase activity which decreased gradually during fruiting softening.
  
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• Phylogenetic Relationship among Nine Prunus Species Based on Random Amplified Polymorphic DNA
• Ruan Ying;Zhou Puhua;and Liu Chunlin
• Acta Horticulturae Sinica. 2002, 29(3): 218-223.
• Abstract ( 1519 ) HTML ( 1341 ) PDF (138KB) ( 1341 ) 　　　
• In this study, nine species of Prunus (20 materials) were analyzed using random amplified polymorphic DNA markers. 24 primers were screened from 45 arbitrary 102mer primers , and a total of 326 DNA bands were amplified , 311 of which (95. 4 %) were polymorphism. According to the data , a tree diagramof phylogenetic relationship was constructed using UPGMA in NYSYS. The results showed that : 1) P. ussuriensis was a variety of P. salician , not a independent species ; 2) P. simonii was a hybrid of P. salician and P. armaniaca and was closely related to P. armaniaca ; 3) P. domestica was a offspring formed by naturally crossing between P.cerasifera and P. spinosa.
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• Obtaining Transgenic Plants of Chinese Cabbage Resistant to Pieris rapae L.with Modified CpTI Gene (sck)
• Yang Guangdong;;Zhu Zhen;Li Yan'e;Zhu Zhujun;Xiao Guifang;and Wei Xiaoli
• Acta Horticulturae Sinica. 2002, 29(3): 224-228.
• Abstract ( 1917 ) HTML ( 1484 ) PDF (339KB) ( 1484 ) 　　　
• Modified CpTI (Cowpea Trypsin Inhibitor) gene (sck) was successfully transferred into Chinese cabbage (Brassica campestris L. ssp. pekinensis) varieties ‘GP-11’and ‘Zhongbai 4’ mediated by Agrobacte rium tumefaciens. Kanamycin resistant plants were obtained from cotyledons with petiole. PCR and Southern blot assays confirmed that sck genewas integrated into Chinese cabbage genome DNA. The test about expression of CpTI inhibitory activity indicated that almost every transgenic plant had ability to inhibit bovine trypsin, and non transformed plants had lower activity. Insect􀀁tolerance of the transgenic plants to Pieris rapae L. were observed in
  the laboratory and field which showed some transgenic plants had strong resistance to this pest.
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• Construction of Molecular Linkage Map of Brassica oleracea var. alboglabra ×B. oleracea var. capitata by RAPD analysisAbstract : Key words :
• Chen Shuxia;Wang Xiaowu;Fang Zhiyuan;Cheng Zhihui;and Sun Peitian
• Acta Horticulturae Sinica. 2002, 29(3): 229-232.
• Abstract ( 1519 ) HTML ( 1371 ) PDF (196KB) ( 1371 ) 　　　
• The hybrids were produced by a cross between Brassica oleracea var. capitata and B . oleracea var. alboglabra. A total of 300 random primers were initially screened using two parents , of which 150 showed polymorphism between two parents. The ratio of polymorphism primers is 58. 3 %. 96 F₂ individuals were analyzed using 52 10 bp random primers to select polymorphic , stable and repeatable fragment in preliminary segregation
  analysis. Most (95. 8 %) of the segregating fragments followed the expected 3∶1 Mendelian segregation ; 4. 2 % showed significant segregation distortion. This shows that the population is suited for analysis of QTLs. There were two pairs of RAPD markers which showed cosegregation. A genetic linkage map of B. oleracea was constructed based on the segregation of 96 RAPD polymorphic loci in one F₂ population of B. oleracea var. capitata ×B.oleracea var. alboglabra. The genetic markers defined nine linkage groups, covering 555. 7 recombination units.
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• The Relationship Between Heat Injury and Polyamines or Proline ContentsDuring Anther Development and Pollen Germination in Cucumber
• Miao Minmin and Cao Beisheng
• Acta Horticulturae Sinica. 2002, 29(3): 233-237.
• Abstract ( 1599 ) HTML ( 1412 ) PDF (218KB) ( 1412 ) 　　　
• Cucumber (Cucumis sativus L. ) anthers had lower Put , Spm, Spd contents and higher free proline (Pro) contents at anthesis than those at pollen mother cell formation stage and monokaryotic pollen stage, high temperature (35 ℃/ 20 ℃) could reduce Put , Spm , Spd contents at stage 1 and stage 2, and reduce Pro contents in anthers and pollens at anthesis. During cucumber pollen culturing, Put, Spm, Spd contents reached max in 1 h then descended, Pro contents descended gradually, Put, Spm, Spd contents decreased and Pro contents increased when cucumber pollen germinated under high temperature ( 35 ℃) . In heat sensitive line Xintaimici , the effects of high temperature on physiological processes above were more serious than those in heat tolerant line XC-1 and NY-1 , which indicated polyamine and Pro might play a key role in cucumber anther development and pollen germination. Gabaculine, a inhibitor of ornithine aminotransferase, could inhibit cucumber pollen germination, improve polyamine contents and reduce Pro contents during pollen germination, which indicated there might be a Pro to polyamine biochemistry route during cucumber pollen germination.
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• Distribution Dynamics of Nitrogen in the Organs of Sweet Pepper (Capsicumannuum L. ) at Early Flowering Stage
• Sui Fanggong;Wang Yunhua;Yao Yuanxi;Wunimuren;and Shunji Inanaga
• Acta Horticulturae Sinica. 2002, 29(3): 238-242.
• Abstract ( 1430 ) HTML ( 1013 ) PDF (197KB) ( 1013 ) 　　　
• Sweet pepper (Cap sicum annuum L. ) grown in water culture was used to study the distribution dynamics of nitrogen absorbed at early flowering stage with ¹⁵N tracer technique. The results obtained are as follows: The nitrogen concentration in root and fruit was kept steady from the early picking stage. In the leaves it decreased rapidly with growth and development and was not much different from the root and fruit at the profuse fruiting stage but it was two times higher than that in the stem and branch. The nitrogen accumulat ion dynamics was similar to the accumulation dynamics of the dry matter. Most of the labeled nitrogen, which was absorbed at early flowering stage by root, have been remained in leaves and its translocation ratio was 50. 6% from the leaves to the new organs after two weeks, and 57. 1% and 58. 0% after 4 weeks and 6 weeks respectively, indicating the new absorbed nitrogen is easier to be translocated. The labeled nitrogen in fruit harvested 2 weeks after early flowering stage make up 3. 24% of the total labeled nitrogen absorbed at early flowering stage and 11. 12% , 4. 49%, 4. 75% for the fruits harvested 3, 4 and 6 weeks after early flowering stage respectively. It is indicated that fruit is the strong nitrogen sink in the plant of sweet pepper. It is the fruit that have the most competit ive ability of
  nitrogen.
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• The Effect of Calmodulin Antagonist and Calcium on Chilling Resistance ofEggplant Seedling
• Gao Hongbo and Chen Guilin
• Acta Horticulturae Sinica. 2002, 29(3): 243-246.
• Abstract ( 1419 ) HTML ( 1753 ) PDF (187KB) ( 1753 ) 　　　
• The effect of calmodulin antagonist W7 and Ca²⁺ on chilling resistance of eggplant seedlings were studied. Seed soaking with W7 distinctly enhanced the contents of electrolyte leakage and malondialdehyde (MDA) , reduced the activities of superoxid dismutase ( SOD) , catalase (CAT) and the content of soluble protein of eggplant seedling leaves under chilling stress , seed soaking with Ca²⁺ solution obviously decreased the contents of electrolyte leakage and MDA , increased the activities of SOD , CAT and the content of soluble protein of leaves. The result suggests that Ca²⁺-CaM messenger system plays an important role in controlling chilling resistance of eggplant seedling.
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• Studies on the Rapid Propagate of the Osmunda japonica Thund.
• Yuan Yi;Tian Shengni;Ye Aihua;and Lu Peiling
• Acta Horticulturae Sinica. 2002, 29(3): 247-250.
• Abstract ( 1464 ) HTML ( 1141 ) PDF (178KB) ( 1141 ) 　　　
• The factors of influencing spore germination was studied in this paper. The suitable culture medium and spore density for Osmunda japonica Thund. spores was 1/ 8 MS and 3 000/ cm². After germinating, spores grew into the filiform shape , flaky , prothallium and developed into sporophyte 4 months later. The optimized culture medium for prothallium to disintegrate sporophyte was 1/ 8 MS + 6-BA 1 + NAA 0. 5 and culture mediumof root growing was 1/ 8 MS + 6-BA 0. 5 + NAA 1. 0. The growth of seedlings was closely related to sunlight , temperature and humidity.
  
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• Seed and Shoot2tip Tissue Culture and Morphogenesis of Protocorms in Cymbi-dium eburneum var. parishii ( Rchb. f . ) Hook. f .
• Chen Chunman;Ye Yizhi;and Ling Xubo
• Acta Horticulturae Sinica. 2002, 29(3): 251-254.
• Abstract ( 1636 ) HTML ( 1147 ) PDF (291KB) ( 1147 ) 　　　
• A propagation method of Cymbidium eburneum var. parishii (Rchb. f . ) Hook. f . by in vitro culture of seeds and shoot-tips , and the morphogenesis of protocorms from the cultured seeds are described in this paper. The germination capacity of young seed was very low but became prominently higher when it reached five months old. Although seeds could germinate on basal medium , addition of coconut milk , or NAA and KT to the medium clearly stimualted the germination of seed. After germination , The embryos developed into PLBs, which latter multiplicated and differentiated into leaves and roots , to form complete plantlet . It took more than seven months for seeds to develop to plantlets after sowing. Protocorm2like bodies (PLBs) were induced from shoot-tip explants in MS medium supplemented with NAA 0. 1 mg·L^-1, BA 3. 0 mg·L^-1 and coconut milk 10 %. PLBs multiplicated in MS medium supplemented with NAA 0. 1 mg·L^-1 and BA 5. 0 mg·L^-1. Plantlets were induced from PLBs in the media without any hormone. Roots were induced in 1/ 2 MS medium supplemented with 7 % banana juice and 3 % potato juice. The multiplication rate of PLBs were influenced by different light intensity, culture state and pH value significantly.
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• Detection of Alstroemeria aurea Chromosomes in a Series of Its Hybrids
• Zhou Shujun
• Acta Horticulturae Sinica. 2002, 29(3): 255-257.
• Abstract ( 1218 ) HTML ( 1100 ) PDF (184KB) ( 1100 ) 　　　
• A001-I , a species-specific repetitive sequences isolated from Alstroemeria aurea , was used in fluorescence in situ hybridization to detect the fate of A. aurea chromosomes in a series of its hybrids in this study. We could clearly detect the change of the number of A. aurea chromosomes in its related hybrids except for Chromosome 1 , the longest chromosome of A. aurea . This could be helpful to select materials in further Alstroemeria breeding.
  
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研究报告

• The Effect of Exogenous Calcium on Ethylene Production of Apple Fruit
• Liu Huichao;Han Zhenhai;and Xu Xuefeng
• Acta Horticulturae Sinica. 2002, 29(3): 258-260.
• Abstract ( 1544 ) HTML ( 1278 ) PDF (155KB) ( 1278 ) 　　　
• Slices of ‘Fuji’apple fruit which was stored at 0 - 4 ℃ for 1 month were treated with different concentrations of CaCl2 to evaluate the influence of exogenous Ca²⁺ on changes of their ethylene productions. The results showed that Ca²⁺ enhanced the ethylene production when CaCl₂ concentrations were lower than 350 mmol·L^-1, while it inhibited the ethylene production when Ca²⁺ concentration was higher than 350 mmol·L^-1. During 0 - 12 h period of treatment , lower level of Ca²⁺ (80 mmol·L^-1) produced more ethylene continuously , while the higher level of Ca²⁺ (500 mmol·L^-1) inhibited ethylene production steadily. Not only low concentration of Ca²⁺ is a factor of cation to stimulate ethylene production , but Mg²⁺ and Mn²⁺ also showed the similar effect as Ca²⁺ did. La³⁺ (the inhibitor of Ca²⁺) and trifluoperazine (the inhibitor of CaM) inhibited ethylene production in the presence of low Ca²⁺(80 mmol·L^-1) treatment .
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• Study on Characteristics of Polyphenol Oxidase in Pingguoli Pear
• Cheng Jianjun;Ma Ying;Yang Yongli;Ling Haibo;Jiao Mingjing;and Zhuang Yan
• Acta Horticulturae Sinica. 2002, 29(3): 261-262.
• Abstract ( 1707 ) HTML ( 4231 ) PDF (123KB) ( 4231 ) 　　　
• The experiment studied on the Polyphenol oxidase ( PPO) extracted from Pingguoli Pear. Thechange of PPO activity and characteristics showed that the optimal pH of PPO is 4. 6, and optimal temperature is 40 ℃. The inhibition of the inhibitors is in the following order : sodium bisulphate, Vitamin C, citric acid, sodium sulfate. The effect of different zymolyte or different zymolyte concentration on PPO were studied.
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• Effects of Bagging on Pigment, Sugar and Acid Development in ‘Red Fuji’Apple Fruits
• Wang Shaomin;Gao Huajun;and Zhang Xiaobing
• Acta Horticulturae Sinica. 2002, 29(3): 263-265.
• Abstract ( 1808 ) HTML ( 1600 ) PDF (159KB) ( 1600 ) 　　　
• ‘Fuji Nagafu No. 2’apple (Malus pumila Mill . ) was used to determine the effects of bagging on pigment , sugar and acid development in ‘Red Fuji’apple fruits from 1998 to 2000. The results showed that pigments, soluble sugars and titratable acids in bagged fruits had almost the same dynamic changes as those in the naked fruits except for the lower contents during fruit developing , but much rapid increase in soluble sugars and anthocyanin formation were present after bag removal. Fruit bagging was shown to decrease sorbitol and sucrose contents of the fruit very greatly, while contents of fructose and glucose were decreased relatively slightly.
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• Effects of Mn ( salen ) Ⅱ on Photosynthesis and Yield of Jinhua FingeredCitron
• Chen Bingchu and Feng Yunlong
• Acta Horticulturae Sinica. 2002, 29(3): 266-267.
• Abstract ( 1426 ) HTML ( 1032 ) PDF (119KB) ( 1032 ) 　　　
• In this paper, we have used the Mn ( salen) Ⅱ to treat the leaves of Jinhua fingered citron (Citrus medica var. sarcodoctylis Swingle ). The results showed that soluble protein content, rates of net photosynthesis, and respiration in leaves were increased, the bearing rate and output of one tree were increased too. Since the Mn ( salen) Ⅱ is water soluble substance, it could be used conveniently to increase the photosynthetic rate in farming.
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• Changes in Betaine Level in Pear, Jujube and Grapevine Leaves under WaterStress
• Gao Xiuping;Yan Jiyao;Liu Enke;and Zhang Dapeng
• Acta Horticulturae Sinica. 2002, 29(3): 268-270.
• Abstract ( 1470 ) HTML ( 1345 ) PDF (155KB) ( 1345 ) 　　　
• Changes in betaine level in leaves of potted pear (Pyrus bretschneideri Rehd. ) , jujube (Zizyphus jujuba Mill . ) and grapevine (Vitis vinifera L. ) plants during water stress period were measured. The results showed that there existed in full water supply conditions some amount of betaine in the leaves of pear , jujube and grapevine. Light water stress induced sensitively a rise of betaine level in pear mature leaves. There was not found the increase in betaine level of either jujube or grapevine subjected to water stress. The results in the detached leaves suggested that the water stress-induced betaine in pear could be biosynthesized independently by leaves.
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• Observation and Comparison on Pollen Morphology of A New Hybrid LoquatVariety‘Zaozhong 6’and Its Parents
• Lu Xiumin;Chen Jingying;Zhang Limei;Zheng Shaoquan;Yu Dong;and Liao Ruyu
• Acta Horticulturae Sinica. 2002, 29(3): 271-273.
• Abstract ( 1989 ) HTML ( 1158 ) PDF (170KB) ( 1158 ) 　　　
• Shapes, sizes, germinal apertures and surface sculpture of a new hybrid loquat variety‘Zaozhong 6’and its parents ‘Moriowase’and ‘Jiefangzhong’were observed with the aid of scanning electron microscope and optical microscope in the experiment in order to study their genetic relationship. The observation results were treated and analyzed by scanning probe microscope ( SPM ) picture treating technology. The results showed that the pollens of three loquat variet ies resembled a prolate in shapes, and the number of apertures were 3, which belonged to the colporate type. Pollen's P/ E ratioes of Moriowase, Jiefangzhong and the hybrid were 1. 346, 1. 268 and 1. 193, respectively, their pollen's average axial diameters were 20. 71 µm, 24. 33 µm and 23. 83 µm, respect ively. The pollen characteristics of three variet ies evidently differred in the size and exine sculptures, but which of Zaozhong 6 was between parents, thus, the genetic relationship between the hybrid and its parents were revealed from palynology angle, the new clues were provided for the classification, organization, evolution and genet ic relationship of loquat varieties.
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• Correlations of Anthocyanins and Chlorophyll in Peach Leaves
• Qi Jianxun;Hao Yanbin;Zhang Mei;and Leng Ping
• Acta Horticulturae Sinica. 2002, 29(3): 274-275.
• Abstract ( 1528 ) HTML ( 1365 ) PDF (123KB) ( 1365 ) 　　　
• The concentrations of anthocyanins and chlorophyll b in the different mature leaves of‘Tsukuba 3’and David peach have been investigated. The results showed that, with the elevation of leaf2position , in the‘Tsukuba 3’peach leaves , anthocyanins and chlorophyll b contents increased. While in David peach leaves, there was very low content of anthocyanins without variation, and the content of Chlorophyll b varied very little. The results of correlation analysis showed that Chlorophyll b content had a remarkable positive correlations with anthocyanins content ( P < 0. 001 ) . The UV and were identified. The results svisible light absorbing capabilities of‘Tsukuba 3’and David peach leaves howed that, the UV-light absorbability of‘Tsukuba 3’peach leaves was similar to that of David peach leaves, but its green2light absorbability was much stronger than that of David peach.
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• Molecular Research on Huyou Origin
• Chen Ligeng;Hu Xiqin;and Zhao Siqing
• Acta Horticulturae Sinica. 2002, 29(3): 276-277.
• Abstract ( 1323 ) HTML ( 976 ) PDF (101KB) ( 976 ) 　　　
• RAPD analysis on five cultivars of citrus showed that in the amplification bands of OP46 primer, huyou had six bands same as pomelo's and tangerin's respectively; and had four bands same as orange's . Combined RAPD analysis with characterist ics and cold resistance, it can be inferred that huyou is polyhybrid from repeatedly natural hybridization of pomelo, tangerin and orange.
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• Impact of Water Stress on Invertase Expression and Carbohydrate Metabolism in Leaves of Tomato Seedling
• Cheng Zhihui;Meng Huanwen;Julie D. Scholes;and Stephen A. Rolfe
• Acta Horticulturae Sinica. 2002, 29(3): 278-279.
• Abstract ( 1533 ) HTML ( 1267 ) PDF (118KB) ( 1267 ) 　　　
• Changes in invertase expression and carbohydrate metabolism of tomato ( cv. Ailsa Craig) seedling were studied under hydroponic culture with different level of water stress by 5 % , 7. 5 % and 10 % PEG treatment, respectively. The results showed that both soluble acid and apoplastic invertases , and glucose, fructose and sucrose were increased with the increase of water stress. Longer and strong water stress (10 % PEG)
  increased invertase activity and soluble sugar content remarkably but decreased starch level .
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• Ploidy Determination in Cucumber (Cucumis sativus L.)
• Du Shengli;Han Yike;Wei Aimin;Wang Ming;Chen Qimin;and Hou Feng
• Acta Horticulturae Sinica. 2002, 29(3): 280-281.
• Abstract ( 1954 ) HTML ( 2087 ) PDF (233KB) ( 2087 ) 　　　
• Various methods for ploidy determination were investigated and evaluated in cucumber. The results indicated that chromosome counting was the most reliable and precise method , however , it was cumbersome and required skilled cytological techniques; The chromocenter size , heterochromatin number , guard cell chloroplast number and certain plant morphological characteristics have close corelationships with ploidy levels , and are simple and practical methods for ploidy determination but with some shortages.
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• Study on Characteristic of Glabrous Cucumber (Cucumis sativus L.)
• Ma Dehua;Pang Jin’an;Wen Xiaogang;Li Shuju;Huo Zhenrong;and Lin Shiqing
• Acta Horticulturae Sinica. 2002, 29(3): 282-284.
• Abstract ( 1690 ) HTML ( 1016 ) PDF (89KB) ( 1016 ) 　　　
• Characteristic of glabrous cucumber mutant was studied. It is glabrous, gloss, with no thorn on any part of the glabrous plant, and with no spine and tumor on the fruit, so it doesn’t prick the hand. It can be differentiated from the general plants in seedling period with these characteristics. It is shorter than the general plant obviously, and the leaf fast aging is possibly the main cause of its shortness.
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• Rapid Micropropagation System Via in Vitro Culture in Amaryllis vittata and ItsEmbryogenesis
• Zhang Song;Da Kedong;Cao Chenxing;Jiang Luyan;Zhu Ruifu;and Wu Luping
• Acta Horticulturae Sinica. 2002, 29(3): 285-287.
• Abstract ( 1813 ) HTML ( 1582 ) PDF (181KB) ( 1582 ) 　　　
• Effective plant regeneration was obtained on MS medium supplemented with NAA 1 mg/ L and BA 2 mg/ L , using leaves of basal bulb as explants in Amaryllis vittata. The highest callus induction rate was 93. 3 % and shoot induction rate was 90. 0 %. The effect of NAA on morphogenesis was better than 2 ,42D , and that of BA was better than KT. Embryoid was induced after 4 times of subculture of callus. The regenerated shoots and embryoids were rooted on MS mediumwith no hormones. Plantlets with roots were then transplanted into vermiculite sprayed with MS mineral elements once every two days with the survival rate of more than 98 % , or the regenerated shoots with no roots were planted in sterile vermiculite whose survival rate reached more than 85 % in order to save culture time.
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• Effects of IBA Treatments on the Root Growth of Hydroponic Aglaonema‘Silver Queen’
• He Shenggen;Yu Tuyuan;and Mai Lifang
• Acta Horticulturae Sinica. 2002, 29(3): 288-289.
• Abstract ( 1485 ) HTML ( 1316 ) PDF (124KB) ( 1316 ) 　　　
• The number , length and fresh mass of hydroponic Aglaonema ‘Silver Queen ’ roots were increased by treating with 50 - 150 mg/ L indolebutyric acid ( IBA) . Of those , treating with 100 mg/ L IBA could effectively acce2lerate the formation of adventitious roots. Additionally , IBA treatment could enhance the root activity significantly.
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新品种

• ‘Eli 1’—A Early-season Maturity Pear Variety
• Qin Zhongqi;Liu Xianqin;Li Xianming;Zhan Shuhua;Wang Hanchen;Li Yumin;and Zhou Qiaosheng
• Acta Horticulturae Sinica. 2002, 29(3): 290-290.
• Abstract ( 1346 ) HTML ( 905 ) PDF (156KB) ( 905 ) 　　　
• ‘Eli 1’ is a early&#1048577;season maturity pear variety by outcrossing the female parent ‘Fuli’with the male parent‘Jinshuisu’. It ripens at the early July, its fruit shape is nearly round with green skin, Its average fruit weight is 230 g, the biggest one can reaches 493. 5 g. Soluble solid concentration is 10. 6% - 12. 1%, Total acid content is 0. 22% .
  
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• ‘Boyne’—A New Cultivar of Raspberry
• Wu Lin;Zhang Zhidong;Li Yadong;Liu Hongzhang;Chen Huidu;andHao Rui
• Acta Horticulturae Sinica. 2002, 29(3): 291-291.
• Abstract ( 1853 ) HTML ( 919 ) PDF (155KB) ( 919 ) 　　　
• A new promising raspberry cult ivar Boyne! which is an important cultivar for commercial cultivation in China were selected from the introduced cultivars from the United States. It has very strong vigor, large fruit size, high yields, good processing quality.
  
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• A New Middle-late Ripening Apple Variety‘Qinyan’
• Zhao Zhengyang;Fu Runmin;Wang Fucheng;Wang Leicun;Yuan Jingjun;Lu Yumiao;and Gao Hua
• Acta Horticulturae Sinica. 2002, 29(3): 292-292.
• Abstract ( 1624 ) HTML ( 801 ) PDF (65KB) ( 801 ) 　　　
• ‘Qinyan’ is a middle late ripening hybrid selected from‘Tianwanghong’‘Qinguan’. Its fruit shape is conical, average fruit weight is 242 g, the heaviest is 305 g. The ripening date is middie&#1048577;late September. The flesh is crisp, juicy, sour sweet, palatable and aromatic. The fruits have longstorage life. The trees are medium vigorous, early bearing, high productive. The average yield of 5 year-old trees is about 41. 1 t/ hm².
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• A New Watermelon F₁ hybrid Cultivar‘Zhemi 5’
• Zhang Mingfang and Zhu Guorong
• Acta Horticulturae Sinica. 2002, 29(3): 293-293.
• Abstract ( 1457 ) HTML ( 904 ) PDF (61KB) ( 904 ) 　　　
• ‘Zhemi 5’ is a newly-released mid-early watermelon hybrid. It takes approximately 90 days from sowing to harvest with about 32 days for fruit maturity. It is round in shape with smooth dark&#1048577;blue rind and hidden
  stripes. The fruit is medium sized with average weight of about 5 to 6 kilogram. It is of high edible quality with sweet , crisp and juicy red flesh. The Brix in the central part of fruit is 11. 9 % and 9. 0 % in the adjacent part of
  rind. Moreover, it is characterized by relatively high resistance to Fusarium wilt and anthracnose, and good tolerance to drought and humid climate.
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• A New Pepper Hybrid‘Xinjiao 6’
• Ge Jufen;Yan Tong;Reyila;and Zhang Xinyang
• Acta Horticulturae Sinica. 2002, 29(3): 294-294.
• Abstract ( 1475 ) HTML ( 808 ) PDF (61KB) ( 808 ) 　　　
• ‘Xinjiao 6’is a early to middle maturity pepper hybrid. It takes about 30 days from transplanting to harvest . The variety is suitable for protected production in early spring and late autumn. It is of good vigor, resistance to disease and tolerant to chilling and low light. It has some good characters, such as early ripening, high yield, large fruit, good quality and high marketable fruit percentage. The yield is 45- 55 t/hm².
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• ‘Jiyan 6’—A Sweet Pepper Hybrid Produced by Male Sterile Lines Fan
• Fan Yanqin and Liu yun
• Acta Horticulturae Sinica. 2002, 29(3): 295-295.
• Abstract ( 1231 ) HTML ( 818 ) PDF (60KB) ( 818 ) 　　　
• ‘Jiyan 6’ is a hybrid of sweet pepper by crossing the genic male sterile line AB_91-XB with inbred line 96-4. The variety has an early-middle maturity and good tolerance to diseases. It has high yield and good quality. The variety is suitable for protected and open field production.
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• New Rhododendron Hybrid —‘Zhaohui’and‘Hongyun’
• Zhang Changqin;Luo Jifeng;and Feng baojun
• Acta Horticulturae Sinica. 2002, 29(3): 296-296.
• Abstract ( 1482 ) HTML ( 1006 ) PDF (183KB) ( 1006 ) 　　　
• ‘Zhaohui’is a hybrid of Rhododendron decorum crossing with R. delavayi in 1985. It is an evergreen shrub with leathery oblong-oblanceolate, rey-green upper leaf surface and a rounded copect umbel of 10 -12 deep crimson flowers. ‘Hongyun’also is a hybrid of R. irroratum crossing with R. delavayi in 1985. It is abeautiful evergreen shrub with bright green leaves and a lax racemose umbel of about 8 - 10 upper side pike and lower yellow flowers with purple spots.
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