【摘要】 将经过干旱(基质含水率低于6.0%)72 h、低温((10±1)℃)72 h、盐(0.25 mol/L NaCl溶液)120 h预处理的3组麻疯树(Jatropha curcasL.)幼苗,与对照组一起置于低温((2±1)℃)条件下72 h,测定其间叶片的电解质相对渗漏率和叶鲜重等的变化。结果表明:与对照相比,经预处理的幼苗在2℃左右低温下除生长状况较好外,叶片电解质相对渗漏率显著降低,叶鲜重受影响较小。换言之,不同胁迫预处理能有效地提高麻疯树幼苗的抗冷性,说明麻疯树幼苗具有一定的交叉适应能力。更多还原

【Abstract】 The changes of relative leakage of electrolytes and fresh weight from leaves of Jatropha curcas L.seedlings were studied after the seedlings were pretreated with drought(the water content of ground substance was less than 6.0%) for 72 hours,low temperature(((10±1)℃)) for 72 hours and salt solution(0.25mol/L NaCl) for 120 hours,and during low temperature((2±1)℃) for 72 hours together with the controls.The results showed that the relative leakage of electrolytes of pretreated seedlings was markedly reduced and fresh weights of leaves were small affected compared with the control(CK). In other words,different stresses pretreatments could efficiently enhance the chilling resistance of J.curcas seedlings.It is suggested that J.curcas seedlings have an ability of cross-adaptation under the stress condition.更多还原