Effects of growth promoting hormones on physiological and biochemical indexes of mulberry leaves during senescence

doi:10.3969/j.issn.1004-1524.2023.06.05

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (6): 1278-1285.DOI: 10.3969/j.issn.1004-1524.2023.06.05

• Crop Science • Previous Articles Next Articles

Effects of growth promoting hormones on physiological and biochemical indexes of mulberry leaves during senescence

ZHU Yan¹(), WEI Jia¹, XU Zilong¹, LIN Tianbao¹, YANG Sheng², LIU Yan¹, LYU Zhiqiang¹, LIU Peigang¹^,^*()

1. Institute of Sericulture and Tea, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
2. Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou 325005, Zhejiang, China

Received:2022-05-05 Online:2023-06-25 Published:2023-07-04

Abstract

Abstract:

The content of auxin (IAA), cytokinin (CTK), and gibberellin (GA) and main physiological and biochemical indexes in leaves of Qiangsang 1 (late senescence) and Heyebai (early senescence) before and after application of exogenous hormones and inhibitors were determined in this study for examining the effect of growth-promoting hormones on the senescence of mulberry leaves. The results showed that the IAA, CTK and GA in Qiangsang 1 were significantly higher than those of Heyebai at the same time; the content of them were up-regulated significantly after treatment by exogenous hormones (P<0.05) and down-regulated significantly after treatment by those inhibitor (P<0.05). In addition, after treatment by exogenous hormones, the activities of CAT, POD, and SOD, and SP content and Pro content in leaves were up-regulated significantly, while MDA content was down-regulated significantly (P<0.05). The activities of CAT, POD and SOD, MDA content, SP content and Pro content in mulberry leaves changed differently due to the mulberry varieties and the types of inhibitors after treatment with inhibitors.

Key words: growth promoting hormone, mulberry, leaf, senescence

CLC Number:

S888.2

ZHU Yan, WEI Jia, XU Zilong, LIN Tianbao, YANG Sheng, LIU Yan, LYU Zhiqiang, LIU Peigang. Effects of growth promoting hormones on physiological and biochemical indexes of mulberry leaves during senescence[J]. Acta Agriculturae Zhejiangensis, 2023, 35(6): 1278-1285.

Figures/Tables 5

Fig.1 Changes in contents of plant growth hormone in mulberry leaves at differential stages “*” represents significant differences at P<0.05.

Fig.2 Effects of exogenous hormones and their inhibitors on endogenous hormones in mulberry leaves

Fig.3 Effects of exogenous hormones and their inhibitors on antioxidant enzyme activities in mulberry leaves

Fig.4 Effects of exogenous hormones and their inhibitors on MDA content in mulberry leaves

Fig.5 Effects of exogenous hormones and their inhibitors on SP content and Pro content in mulberry leaves

References 17

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Effects of growth promoting hormones on physiological and biochemical indexes of mulberry leaves during senescence

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