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Ca~(2+)对水分胁迫下番木瓜若干生理指标的影响
黄建昌;肖艳;周厚高
1.仲恺农业技术学院园艺系;2.仲恺农业技术学院园艺系 广东广州510225;3.广东广州510225
摘要:
研究了水分胁迫下Ca2 + 对提高番木瓜 (穗中红 )幼苗抗旱性的影响。结果表明 ,用 0 .5~ 2 .5mmol/L的CaCl2 喷施番木瓜幼苗 ,能有效提高其叶片可溶性糖含量和POD及SOD活性 ,降低相对电导率 ,减缓叶绿素的分解。CaCl2 处理对Chl.a的保护效果显著 ,而对Chl.b则无明显影响。其中以 1 .5mmol/L的CaCl2 对提高番木瓜幼苗的抗旱性效果最好
关键词:  番木瓜    CaCl2    水分胁迫    相对电导率    POD    叶绿素
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