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ACTA HORTICULTURAE SINICA ›› 2003, Vol. 30 ›› Issue (1): 19-22.

• 研究论文 • Previous Articles     Next Articles

Accumulation and Distribution of Manganese in Shoots of Apple Cultivars withDifferent Sensitivity to Manganese

Xu Shengyou1,2;Yao Qing3;Wang He1;Zhang Fusuo1 ;Yu Zhongfan4;Jiang Xueling4   

  1. (1 Department of Plant Nutrition , China Agricultural University , Beijing 100094 , China ;2 Department of Resource and environment,Huangshan College , Huangshan 245000 , China ;3 College of Horticulture , South China Agricultural University , Guangzhou 510000 ,China ;4 Institute of Soil and Fertilizer , Yantai Academy of Agricultural Science , Yantai 265500 , China)
  • Received:2002-04-18 Revised:2002-07-08 Online:2003-02-25 Published:2003-02-25

Abstract: With two apple cultivars of different resistance to internal bark necrosis ( IBN) as plant material ,field investigation and greenhouse culture were carried out to elucidate the relationship between accumulation and distribution of Mn in apple shoots and resistance to IBN. Investigation revealed higher Mn content in phloem and shoot of sensitive cultivar than those in xylem and shoot of resistant cultivar. Histochemical test , microscopic observation and X-ray analysis indicated that manganese oxide deposited in the IBN spot tissue , and the accumulation and distribution of Mn coincided with the IBN spot in phloem. Localized accumulation of Mn was found in the shoot cross-section of sensitive cultivar , while a even distribution of Mn was found in resistant cultivar.

Key words: Apple, IBN, Cultivars, Mn, Content, Distribution

CLC Number: