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本文研究了不同发芽促进剂及热震荡对芸薹属的不同种质的破眠效果,结果表明:(1)野生或自生种质的种子与栽培种质相比,均有较深的休眠性,其中尤以云南野生白菜(Brassiacampestris L.)及新疆毛芥(B.xinjiangensis Y.Z.Lan)的休眠性为强。(2)GA_2结合其他发芽促进剂与单独GA_2处理,对种子的萌发都有明显的促进作用,破眠程度(DBE)值在0.78—0.86之间,两者之间不存在显著差异,但是不同种质的DBE变化较大,以较深休眠的自生芥菜(B.juncea L.)效果最差。(3)热震荡对于解除芸薹属自生芥菜种子休眠的效果更差,劣于200ppm GA_3。
In this paper, the effects of different germination promoters and heat shocks on the hypnotic effect of different germplasm of Brassica were studied. The results showed that: (1) Compared with the cultivated germplasm, wild or self-germinating seeds had deeper dormancy , Especially in Yunnan wild cabbage (Brassiacampestris L.) and Xinjiang hairy mustard (B.xinjiangensis YZLan) dormancy is strong. (2) GA_2 combined with other germination accelerators and GA 2 alone significantly promoted the germination of seeds, and the DBE value ranged from 0.78 to 0.86. There was no significant difference between them, but different The germplasm DBE changed a lot, and the autotrophic mustard (B.juncea L.) with the poorest dormancy was the worst. (3) Heat shock worsened the dormancy of Brassica autotrophic mustard seeds, which was worse than 200ppm GA_3.