甘薯可溶性蛋白、叶绿素及ATP含量变化与品种抗旱性关系的研究

 对水分胁迫下甘薯叶片部分物质和能量代谢指标的研究结果表明 ,水分胁迫下叶片中可溶性蛋白含量明显增加 ;叶绿素a、叶绿素b、总叶绿素含量及叶绿素a/b比值与对照相比均有所下降 ;ATP含量有增有减 ,但品种抗旱性愈强 ,ATP含量愈高。叶片中可溶性蛋白含量、叶绿素a/b比值、ATP含量占对照百分率与品种抗旱性间的相关系数r分别为 0 .896 8、- 0 .85 0 9和 0 .82 0 0 ,P <0 .0 1。因此 ,这些指标可用于甘薯不同品种抗旱性的评定

Relationship Among Soluble Protein,Chlorophyll and ATP in Sweet potato Under Water Stress with Drought Resistance

Some indices concerning the metabolism of substance and energy in sweet potato leaves under water stress were studied. Soluble protein contents increased obviously. Compared with control one, Chl a, Chl b, total Chl contents and the ratio between Chl a and Chl b all decreased to some extent. ATP contents increased in some varieties and decreased in others, but the stronger the drought resistance of variety is, the higher the ATP contents are. The correlation coefficients(r)on the soluble protein contents, the ratio between Chl a and Chl b and ATP contents as percentage of control with drought resistance of sweet potato varieties are 0.8968, -0.8509 and 0.8200, respectively (P<0.01). These indices can be used to evaluate the drought resistance of different sweet potato varieties.