植物学报 ›› 2019, Vol. 54 ›› Issue (2): 227-236.DOI: 10.11983/CBB18142

所属专题: 逆境生物学专辑 (2019年54卷2期)

• 研究报告 • 上一篇    下一篇

钼在桃树干旱胁迫响应中的作用解析

郜怀峰,张亚飞,王国栋,孙希武,贺月,彭福田(),肖元松()   

  1. 山东农业大学园艺科学与工程学院, 作物生物学国家重点实验室, 泰安 271018
  • 收稿日期:2018-06-19 接受日期:2018-11-16 出版日期:2019-03-10 发布日期:2019-09-01
  • 通讯作者: 彭福田,肖元松
  • 基金资助:
    国家现代农业产业技术体系建设专项资金(CARS-30-2-02);山东省自然科学基金(ZR2017BC017);山东省“双一流”建设奖补资金(SYL2017YSTD10)

The Effect of Molybdenum on Drought Stress Response in Peach

Huaifeng Gao,Yafei Zhang,Guodong Wang,Xiwu Sun,Yue He,Futian Peng(),Yuansong Xiao()   

  1. State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
  • Received:2018-06-19 Accepted:2018-11-16 Online:2019-03-10 Published:2019-09-01
  • Contact: Futian Peng,Yuansong Xiao

摘要: 以毛桃(Amygdalus persica)实生苗为试材, 研究干旱胁迫下, 钼酸铵处理对钼辅因子硫化酶编码基因(LOS5/ABA3)表达量、脱落酸(ABA)含量及抗旱相关生理指标的影响。结果表明, 干旱胁迫下, 喷施不同浓度钼酸铵处理毛桃实生苗叶片, 其含水量及叶绿素和脯氨酸含量显著高于对照, 且以0.04%钼酸铵处理效果最好; 电解质渗漏率显著低于对照。干旱胁迫下, 与对照相比, 喷施0.04%钼酸铵的毛桃实生苗叶片中LOS5/ABA3表达量显著提高; ABA含量、水分利用效率和净光合速率均高于对照, 蒸腾速率低于对照, 且差异显著; 叶片抗氧化酶活性显著升高, MDA含量显著降低; 离体处理的叶片质量损失减缓, 且差异显著。研究表明毛桃实生苗在干旱胁迫下喷施钼酸铵可通过上调钼辅因子硫化酶编码基因的表达水平, 提高叶片中ABA和脯氨酸含量及抗氧化酶活性, 从而缓解干旱胁迫下的细胞膜氧化伤害, 降低叶片失水速率, 减轻干旱胁迫对毛桃实生苗的伤害。

关键词: 桃实生苗, 钼酸铵, 干旱胁迫, LOS5/ABA3, 抗旱性

Abstract: Peach (Amygdalus persica) seedlings were used to analyze the effect of ammonium molybdate on the expression of molybdenum cofactor sulfurase gene (LOS5/ABA3), ABA content and physiological indexes related to drought resistance under drought stress. Water, chlorophyll and proline contents of peach seedling leaves were significantly higher with ammonium molybdate, preferably 0.04%, than control treatment, and electrolyte leakage was lower. Under drought stress, the expression of LOS5/ABA3 in leaves treated with 0.04% ammonium molybdate was significantly increased and ABA content, water use efficiency, and net photosynthetic rate was higher than with control treatment. Transpiration rate was lower, antioxidant enzyme activity was higher, and malondialdehyde content was lower in leaves; the quality loss of leaves in vitro was reduced. Thus, ammonium molybdate treatment of peach seedlings can increase the content of ABA and proline, increase the activity of antioxidant enzymes, relieve cell membrane oxidation damage, decrease the rate of water loss of leaves, and alleviate drought stress damage by regulating the expression of drought- resistant genes, then increase the drought resistance of plants.

Key words: peach seedlings, ammonium molybdate, drought stress, LOS5/ABA3, drought resistance