GUO Chuan-long,ZHAO Yan,WU Kong-huan,et al.Effects of AMP on the Al-induced Citrate Exudation and Al-resistance of Tamba Black Soybean[J].Soybean Science,2015,34(01):82-86.[doi:10.11861/j.issn.1000-9841.2015.01.0082]
AMP对铝胁迫诱导丹波黑大豆柠檬酸分泌及其铝耐受性的影响
- Title:
- Effects of AMP on the Al-induced Citrate Exudation and Al-resistance of Tamba Black Soybean
- Keywords:
- Al stress; Al resistant black soybean; 14-3-3 protein; Plasma membrane H+-ATPase; Adenosine 5’-monophosphate
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 为了考察AMP(Adenosine 5’ monophosphate)对铝耐受型丹波黑大豆(RB)柠檬酸的分泌及铝抗性的影响,在50 mmol?L-1铝溶液中添加100 mmol?L-1?AMP共处理RB,结果表明RB根的相对生长率显著小于单独用50 mmol?L-1铝胁迫处理的植株。免疫共沉淀分析显示铝胁迫下AMP的存在降低RB根中14-3-3蛋白与磷酸化质膜H+ATP酶的相互作用,使根尖质膜H+ATP酶活性降低约1倍,氢泵活性和H+分泌能力显著降低,根柠檬酸的分泌量减少约1倍。说明铝胁迫下AMP通过抑制14-3-3蛋白和质膜H+ATP酶的互作来减少RB根尖的氢泵活性和柠檬酸分泌作用,从而降低RB根的相对生长率及其对铝胁迫的耐受性。
- Abstract:
- To investigate the effect of Adenosine 5’ monophosphate (AMP) on the citrate secretion and Alresistance of Alresistant Tamba black soybean (RB). RB was cotreated with AMP and 50 mmol?L-1?Al. The results showed that the relate root growth rate of RB cotreated with 100 mmol?L-1?AMP and 50 mmol?L-1?Al for 8 h was significantly lower than that of the plants treated with 50 mmol?L-1?Al alone. Co-immunoprecipitation showed that the presence of AMP under Al stress decreased the Al-enhanced interaction of PM H+-ATPase and 14-3-3 protein in root tips of RB, which reduced PM H+-ATPase activity by approximately 1-fold and thereby led to a significant decrease in H+ efflux and citrate secretion (approximately 1-fold) in RB roots. Those results indicated that AMP decreases H+ activity and citrate exudation in RB via its inhibition on the interaction between 14-3-3 protein and PM H+-ATPase under Al stress, thereby reducing the relate root growth rate of RB and its Al-tolerance.
参考文献/References:
[1]Ma J F, Furukawa J. Recent progress in the research of external Al detoxification in higher plants:A minireview [J]. Journal of Inorganic Biochemistry, 2003, 97:46-51.
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备注/Memo
基金项目:国家自然科学基金(31260063)。