外源多胺对水稻萌发和前期生长的作用及其在土壤中的滞留

Effect of supplemented polyamines on the germination and early growth of rice and their adsorption in soil

研究了不同浓度的多胺（尸胺、腐胺和亚精胺）对水稻种子萌发幼苗生长的化感作用结果表明．外源多肢对水稻种子萌发和幼苗生长均有抑制作用，尤其是对根的抑制，其作用程度依次为亚精胺＞腐胺＞尸胺，但是外源多胺能显著地提高水稻幼苗的抗冷性．使用灭菌土壤和用蒸馏水、Ｎａ２ＥＤＴＡ和盐酸水溶液浸取的实验结果表明，尸胺进入土壤后，大部分被土壤吸附和络合而滞留，少部分自由存于土壤中，在络合剂和酸存在下。

The effect of supplemented polyamines in different concentration on germination and ￣lug growth of rice was studied. The results show that the germination and seedling growth of rice,especially root growth are inhibited by supplemented polyamines. The extent o[ the inhibition is in the order of spermindine> putrescine>cadaverine. However, they can significantly enhance chilling resistance of seedling growth of rice. The study on the extractibility of cadaverine from alltoclaved soil extracted with water or solution of Na2EDTA and HCI indicates that most of it will be adverbed by soil. The soil adsorptloll of cadaverine is reversible in the existence of acid and complexing agent.