Influences of 5-ALA application on winter oilseed rape (Brassica napus L.) growth before winter | 5-姘ㄥ轰颁稿补跨褰卞
2011
Zhang Shujie, Chinese Academy of Agricultural Sciences, Wuhan (China) ,Oil Crops Research Institute | Li Ling, Chinese Academy of Agricultural Sciences, Wuhan (China) ,Oil Crops Research Institute | Li Guangming, Chinese Academy of Agricultural Sciences, Wuhan (China) ,Oil Crops Research Institute
[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-1 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-1 ALA solution might have a potential application in increasing the productivity of winter oilseed rape in agricultural management.
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