论文部分内容阅读
以‘花溪’辣椒(Capsicum annuum L.)为试材,研究淹水胁迫不同时间(0、3、6、9、12d),Ca2+对辣椒幼苗根系生长和呼吸代谢相关酶活性的影响。结果表明:外源Ca2+浸种处理对淹水胁迫下幼苗的伤害有显著的缓解效应,可改善根系的生长状况,根系总长度、总表面积、体积、根尖数和平均直径等都显著高于单纯淹水胁迫;与单纯淹水胁迫相比,外源Ca2+处理能够提高根系活力,降低根系电解质渗出率,提高ADH活性,降低LDH活性,避免乳酸和乙醛的积累,同时使根系保持较高的MDH和SDH活性,进行一定的有氧呼吸代谢。以上结果表明,外源Ca2+可通过调节辣椒幼苗根系内呼吸代谢来缓解淹水胁迫对植株的伤害。
Capsicum annuum L. was used as experimental material to study the effect of Ca2 + on the root growth and the enzyme activity related to respiratory metabolism at different time (0, 3, 6, 9, 12 d) after flooding stress. The results showed that exogenous Ca2 + soaking treatment could significantly alleviate the injury of seedlings under flooding stress and improve the growth of root system. The total root length, total surface area, volume, root tip number and average diameter were significantly higher than those of pure Under waterlogging stress, exogenous Ca2 + treatment increased root activity, decreased electrolyte exudation rate, ADH activity, LDH activity, and lactic acid and acetaldehyde accumulation, while maintaining higher roots MDH and SDH activity, a certain degree of aerobic respiratory metabolism. The above results show that exogenous Ca2 + can alleviate the injury of plants by flooding stress by regulating the respiratory metabolism in the roots of pepper seedlings.