The alterations of endogenous polyamines and phytohormones induced by exogenous application of spermidine regulate antioxidant metabolism, metallothionein and relevant genes conferring drought tolerance in white clover
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- 作者：Zhou Lia ; Yan Zhanga ; Xinquan Zhanga ; Yan Penga ; pengyanlee@163.com" class="auth_mail" title="E-mail the corresponding author ; Emily Merewitzb ; yemmel@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Xiao Maa ; Linkai Huanga ; Yanhong Yana
- 关键词：ABA ; abscisic acid ; APX ; ascorbate peroxidase ; AsA&ndash ; GSH cycle ; ascorbate&ndash ; glutathione cycle ; AsA ; ascorbic acid ; CAT ; catalase ; Chl ; chlorophyll ; CTK ; cytokinin ; Cyt ; cysteine ; DAsA ; dehydroascorbic acid ; DCHA ; dimethylthiourea ; DHAR ; dehydroascorbate reductase ; EL ; electrolyte leakage ; ELISA ; enzyme linked immunosorbent assay ; GA ; gibberellic acid ; GPOX ; guaiacol peroxidase ; GPX ; glutathione peroxidase ; GR ; glutathione reductase ; GSH ; reduced glutathione ; GSSG ; glutathione disulfide
- 刊名：Environmental and Experimental Botany
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：124
- 期：Complete
- 页码：22-38
- 全文大小：4567 K
文摘
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There is a cross-talk between polyamines (PAs) and phytohormones under drought and well-watered conditions.
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The changes of endogenous PAs and phytohormones resulted in accelerated proline metabolism and elevated AsA–GSH cycle and relevant genes expression.
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Other metabolites such as total phenols, flavonoid, cysteine and metallothionein (MT) were also elevated with significantly increased endogenous PAs content.
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On the contrary, the deficiency in PAs weakened antioxidant defense and proline metabolism, inhibited MT genes expression leading to aggravation of drought-induced stress damage.