The Effects of Salicylic Acid on Lateral Roots Formation in Rape Seedlings
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摘要: 将品质均一的油菜(Brassica napusL.)种子播在加入0、0.08、0.40、2.00和10.00μmol/L等不同浓度水杨酸的MS培养基中进行培养,结果表明,在MS培养基中添加水杨酸对油菜幼苗的侧根发生及内源生长素和脱落酸的含量有明显影响,其中添加0.40μmol/L水杨酸,油菜幼苗的侧根发生量比对照明显增多,侧根发生量比对照增加47.8%,油菜幼苗的茎叶和根部生长素含量都高于对照和其它处理,而脱落酸含量则低于对照和其它处理。由此表明,水杨酸可能通过调节内源生长素和脱落酸含量变化,进而影响油菜幼苗侧根发生。Abstract: Seeds of rape (Brassica napus L.) were cultured in the presence of exogenous salicylic acid ranging from 0.08 to 10.00 μmol/L (0、 0.08、 0.40、 2.00 and 10.00 μmol/L)to see the effect of salicylic acid on the formation of lateral roots in rape. The results show that 0.40 μmol/L salicylic acid treatment enhanced the formation of lateral roots significantly, in which the number of lateral roots was increased by 47.8% compared with the control. More auxin and lower abscisic acid were detected both in leafs and roots of the treatment of 0.40 μmol/L salicylic acid. It showed that salicylic acid might be involved in the regulation of lateral root formation through influencing the content of endogenous auxin and abscisic acid in rape.
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Keywords:
- Rape(Brassica napus L.) /
- Salicylic acid /
- Lateral root formation /
- Auxin /
- Abscisic acid
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