Effects of Salicylic Acid on Growth and Physiological Properties of Medicago sativa in Branching Stage under Different Water Stress

doi:10.11733/j.issn.1007-0435.2016.02.019

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (2): 369-376.DOI: 10.11733/j.issn.1007-0435.2016.02.019

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Effects of Salicylic Acid on Growth and Physiological Properties of Medicago sativa in Branching Stage under Different Water Stress

GENG Zhi-zhuo¹, DING Li-ren², LU Ya-ling¹, LI Zhi-hua¹, LIN Lin-shan¹, ZHOU Xia¹, TANG Li¹

1. College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China;
2. Science and Technology College of Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China

Received:2015-05-27 Revised:2015-12-14 Online:2016-04-15 Published:2016-06-06

外源水杨酸对不同水分胁迫下分枝期紫花苜蓿生长和生理特性的影响

耿志卓¹, 丁立人², 逯亚玲¹, 李志华¹, 琳琳珊¹, 周霞¹, 唐礼¹

1. 南京农业大学草业学院, 江苏南京 210095;
2. 南京农业大学动物科技学院, 江苏南京 210095

通讯作者: 李志华
作者简介:耿志卓(1990-),男,河北石家庄人,硕士研究生,研究方向为牧草高产栽培与利用,E-mail:gengzhizhuo0319@163.com
基金资助:
"十二五"农村领域国家科技计划项目(2011BAD17B03);江苏省大学生创新创业训练计划项目(201510307017Y)资助

Abstract

Abstract:

A potting experiment was conducted to determine the effects of the applied different concentrations(0, 0.02, 0.10, 0.50, 2.50 mmol·L^-1) of salicylic acid on the growth and physiological properties of Medicago sativa at branching stage under different water stress(normal irrigation -80% field capacity, mild water stress -60% field capacity, moderate water stress -40% field capacity, severe water stress -20% field capacity).The results showed that all indices of Medicago sativa under mild water stress by applied with salicylic acid were not significant different from that under normal irrigation. The plant height, stem diameter, shoot number and leaf relative water content of Medicago sativa applied with 0.10 and 0.50 mmol·L^-1 SA were significantly higher than control, the activity of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) were significantly increased (P < 0.05) at the same time. The results suggested that salicylic acid at the appropriate concentrations could increase the drought resistance of Medicago sativa.

Key words: Medicago sativa, Water stress, Salicylic acid, Branching stage, Physiological properties

摘要：

采用盆栽法研究外施不同浓度水杨酸(0,0.02,0.10,0.50,2.50 mmol·L^-1)对不同水分条件下(正常供水-80%田间持水量,轻度胁迫-60%田间持水量,中度胁迫-40%田间持水量,重度胁迫-20%田间持水量)紫花苜蓿(Medicago sativa)分枝期生长和生理特性的影响。结果显示:在轻度水分胁迫下,水杨酸处理的紫花苜蓿与正常供水各指标差异不显著。中度和重度水分胁迫下,0.10和0.50 mmol·L^-1水杨酸可显著(P < 0.05)提高紫花苜蓿株高、茎粗、分枝数及叶片相对含水量,同时,显著提高紫花苜蓿中的超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)的活性。可见,适宜浓度水杨酸可增强紫花苜蓿抗旱能力。

关键词: 紫花苜蓿, 水分胁迫, 水杨酸, 分枝期, 生理特性

CLC Number:

S541.9

GENG Zhi-zhuo, DING Li-ren, LU Ya-ling, LI Zhi-hua, LIN Lin-shan, ZHOU Xia, TANG Li. Effects of Salicylic Acid on Growth and Physiological Properties of Medicago sativa in Branching Stage under Different Water Stress[J]. Acta Agrestia Sinica, 2016, 24(2): 369-376.

耿志卓, 丁立人, 逯亚玲, 李志华, 琳琳珊, 周霞, 唐礼. 外源水杨酸对不同水分胁迫下分枝期紫花苜蓿生长和生理特性的影响[J]. 草地学报, 2016, 24(2): 369-376.

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Effects of Salicylic Acid on Growth and Physiological Properties of Medicago sativa in Branching Stage under Different Water Stress

外源水杨酸对不同水分胁迫下分枝期紫花苜蓿生长和生理特性的影响

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