钙对萝卜幼苗抗寒性及某些生理指标的影响

研究结果表明钙能够提高萝卜幼苗的抗寒性，同时与抗寒性有关某些生理指标也受到影响。在低温胁迫后及恢复生长后处理组的萝卜幼苗的超氧岐化酶、过氧化物酶、抗坏血酸过氧化物酶、过氧化氢酶的活性都对照组高；在低温胁迫后处理组有脯氨酸及抗坏血酸的含量均比对照组高，但修复组萝卜幼苗的丙二醛含量却比对照组低。表明钙对萝卜幼苗抗寒性的影响可能与其防止膜脱过氧化有关。

EFFECTS OF CALCIUM ON CHILLING RESISTANCE OF RADISHSEEDINGS AND SOME PHYSIOLOGICAL INDEXES

Effects of calcium on chilling resistance of radish seedlings and some physiological indexes were studied. The result shows that chilling resistance of the radish seedlings is enhanced and some physiological indexes are affected seeds are pretrated by calcium. The activities of SOD, POD, CAT, AsA-POD of the treated group are ligher than the comparative group's after the seedlings are treated by low temperature stress and after growing at normal temperature. The contents of proline and ascorbic acid of the treated group are higher than the comparative group after low temperature. But, concent of malondialdhyda of the treated group is lower than the comparative group after low temperature. This shows that effect of calcium on chilling resistance of radish seedlings is probably related to preventing lipid peroxidation.