5-氨基乙酰丙酸对冬油菜（Brassica napus L.）冬前生长的影响（摘要）

[目的]探讨外源5-氨基乙酰丙酸（ALA）对冬油菜冬前生长的影响及其机理。[方法]通过田间试验研究了0、25、50和75mg/LALA溶液浸种（CK、A1、A2和A3）对冬油菜（Brassica napus L.）中双9号冬前生长及相关生理指标的影响。[结果]ALA溶液浸种显著促进了中双9号冬前生长,可能与其提高植物光合作用,促进养分吸收,提高抗氧化胁迫能力有关。该研究还发现,ALA处理显著提高了中双9号光合色素含量、根系活力、叶片硝酸还原酶活性、可溶性糖含量及抗氧化酶活性,降低了丙二醛含量。[结论]50mg/LALA浸种在提高冬油菜生产能力方面具有潜在的应用前景。

Influences of 5-ALA Application on Winter Oilseed Rape (Brassica napus L.) Growth before Winter

[Objective] The aim of this paper is to investigate the influences of exogenous 5-aminolevulinic acid (5-aLA) application on the growth and mechanism of winter oilseed rape (Brassica napus L.) before winter. [Method] For this purpose a split-plot experimental design with four treatments of seed soaking with 0,25,50 and 75 mg/L ALA solution (CK,A1,A2 and A3) was carried out from October 2009 to January 2010 in order to observe the influences upon the growth and relevant physiological indexes of Zhongshuang 9. [Result] Seed soaking with ALA solution significantly promotes the growth of double-9 before winter,which is probably due to the fact that ALA application enhances its photosynthesis,absorption of nutrients,and its anti-oxidation abilities. The research also finds that ALA treatment notably increases its photosynthetic pigment contents,root activities,leaf nitrate reductase activities,soluble sugar contents,antioxidase activities,and significantly decreases malondialdehyde(MDA) content. [Conclusion] These results indicate that seed soaking with 50 mg/L ALA solution might have a potential application in increasing the productivity of winter oilseed rape in agricultural management.