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园艺学报 ›› 2003, Vol. 30 ›› Issue (03): 258-262.

• 研究论文 • 上一篇    下一篇

砧木对盐处理下‘丰水’梨幼树光合特性的影响

高光林; 姜卫兵; 汪良驹; 韩浩章; 戴美松   

  1. (南京农业大学园艺学院,南京210095)
  • 收稿日期:2002-10-25 修回日期:2002-12-30 出版日期:2003-06-25 发布日期:2003-06-25

Efects of Rootstocks on Photosynthetic Properties of Young ‘Hosui’ PearTrees under Salinity

Gao Guanglin;Jiang Weibing; Wang Liangju; Han Haozhang; Dai Meisong   

  1. (College of Horticulture,Nanjing Agricultural University, Nanjing 210095,China)
  • Received:2002-10-25 Revised:2002-12-30 Online:2003-06-25 Published:2003-06-25

摘要: 用CIRAS-1便携式光合作用测定系统研究不同盐浓度处理下,分别以‘豆梨’、‘杜梨’作砧
木的‘丰水’梨幼树叶片光合作用。结果表明:(1)不同砧木对盐处理下的丰水梨叶片光合作用反应有显著影响;(2)在相同条件下杜梨上的丰水较豆梨上的丰水有更高的净光合率(Pn)、气孔导度(Gs )、蒸腾速率(Tr)和羧化效率(CE),而在高浓度盐处理下,前者较后者有较低的细胞间隙CO2浓度(Ci)。(3)低盐胁迫对梨叶片光合作用的抑制,初期主要表现为气孔性限制,而在高盐处理和低盐处理后期主要表现为非气孔性限制;(4)不同砧木对梨叶片光合作用的影响在高盐处理后期差异不明显。

关键词: 梨, 砧木, 光合特性, 盐处理, 气孔限制, 非气孔限制

Abstract: The effect of two pear rotstocks ‘Calleryana’ and ‘Betulaefolia’ on photosynthetic properties of young ‘Hosui’ under salinity was measured by portable photosynthesis systems CIRAS-1.The results showed that:(1)There are obvious discrepancy between Pyrus betulaefolia and P.calleryana efect on the photosynthetic properties of Hosui blade; (2)Pn,Gs,Tr,and CE were higher in Hosui combined with P.betulaefolia (H-B)than in Hosui comb ined with P.calleryana (H-C)under the same conditions,H-C with higher Ci than H-B under high salinity.(3)Photosynthesis of pear blade was inhibited by salinity most cause for stomatal limitation under low salinity at early time,and most cause for nonstomatal limitation under high salinity and low salinity at anaphase;(4)In anaphase oftreatment,the discrepancy between P.betulaefolia and P.calleryana efect on photosynthetic properties was dimi nished under severe salinity.

Key words: Pear, Rootstock, Photosynthetic properties, Salinity, Stomatal limitation, Nonstomatal limi tation

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