马铃薯可溶性蛋白、叶绿素及ATP含量变化与品种抗旱性关系的研究

对水分胁迫下马铃薯叶片部分物质和能量代谢指标的研究结果表明,在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之间的相关系数r分别为+0.8750、-0.8509、+0.7945,P<0.01。因此,这些指标可用于马铃薯不同品种抗旱性的评定。

RELATIONS OF SOLUBLE PROTEIN, CHLOROPHYLL AND ATP WITH DROUGHT RESISTANCE IN POTATOES UNDER WATER STRESS

Some indices concerning the metabolism of substance and energy in potato leaves under wa - ter stress were studied.Soluble protein contents increased obviously under water stress.Compared with control ones,Chl-a,Chl-b,total Chl contents and the ratio of Chl-a to Chl-b all decreased to some extent.ATP contents increased in some varieties and decreased in others,but the stronger the drought resistance of varieties,the higher the ATP contents were.The correlation coefficients(r)between the soluble protein contents,the ratio of Chl-a to Chl-b and ATP contents,expressed as the percentage of controls,and drought resistance of potato varieties were + 0.8750,- 0.8509and + 0.7945,respectively(p<0.01).These indices can be used to evaluate the drought resis - tance of different potato varieties.