油菜素内酯对夏季草莓育苗素质及耐逆性的影响

Effects of brassinolide on quality and stress tolerance of summer strawberry seedlings

在夏季高温条件下,对4个草莓品种幼苗进行大田喷施油菜素内酯,研究其对草莓育苗素质及耐逆性的影响。结果表明,油菜素内酯提高了章姬草莓苗素质,表现出高繁殖系数和根系活力,而其余品种未见明显变化。油菜素内酯能够显著降低红颊和章姬品种叶片细胞质膜透性和MDA含量,提高其抗逆能力,而其余品种未见明显变化。油菜素内酯提高了红颊和章姬草莓的APX活性,但也明显降低了红颊、丰香和甜查理草莓的CAT活性。因此,油菜素内酯可以提高抗逆性较差草莓品种章姬和红颊草莓苗的耐逆性。

Effects of brassinolide on quality and stress tolerance of strawberry seedlings of four different varieties after foliar application in field under high temperature in summer. The results showed that brassinolide could significantly improve quality of Akihime strawberry seedlings,which showed high propagation coefficient and root activity. Significant changes were not observed in other varieties. Brassinosteroide significantly increased the stress tolerance of Benihoppe and Akihime strawberry seedlings due to low cell membrane permeability and MDA content. Similar changes were not showed in other varieties. APX activities of Benihoppe and Akihime were increase by brassinolide. However,CAT activities of Benihoppe,Toyonoka and Sweet Charlie were decreased after brassinolide treatment. Therefore,brassinosteroide can significantly improve the stress tolerance of Akihime and Benihoppe strawberry seedlings which have week tolerance.