《植物生理学报》 2012, 48(9): 909-916

干旱胁迫下外源氯化钙、水杨酸和一氧化氮对石蒜抗旱性的影响

蒋明敏, 徐晟, 夏冰, 彭峰, 汪仁*

江苏省中国科学院植物研究所, 南京210014

通信作者：汪仁；E-mail: jswangren@yahoo.com.cn；Tel: 025- 84347111

摘　要：

通过盆栽试验, 研究了外源氯化钙(CaCl2)、水杨酸(SA)和NO供体硝普钠(SNP)处理对干旱胁迫下石蒜抗旱性的影 响。结果表明, 较低浓度的CaCl2对石蒜抗旱性的影响不显著, 而随着CaCl2预处理浓度的提高, 石蒜的抗旱效果显著增强。 较低浓度SA和SNP可显著提高石蒜的抗旱性, 而高浓度则会发生毒害作用。利用模糊隶属函数法综合评价渗透调节物 质、膜系统和抗氧化酶活性多项指标可以得出, 喷施10 mmol•L-1 CaCl 、2 mmol•L-1 SA和0.5 mmol•L-1 SNP对石蒜抗旱性的提高具有显著效果。

关键词：氯化钙; 水杨酸; 一氧化氮; 干旱胁迫; 石蒜

收稿：2012-07-02   修定：2012-07-19

资助：江苏省农业科技自主创新资金项目[cx(11)1016]和江苏省科技支撑计划(BE2011440)。

Effects of Exogenous Calcium Chloride, Salicylic Acid and Nitric Oxide on Drought Resistance of Lycoris radiata under Drought Stress

JIANG Ming-Min, XU Sheng, XIA Bing, PENG Feng, WANG Ren*

Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China

Corresponding author: WANG Ren; E-mail: jswangren@yahoo.com.cn; Tel: 025- 84347111

Abstract:

Pot experiments were conducted to investigate the effects of exogenous calcium chloride (CaCl₂), salicylic acid (SA) and nitric oxide donor sodium nitroprusside (SNP) on drought tolerance of Lycoris radiata under drought stress. The results showed that lower concentration of CaCl₂ had no significant effect on drought resistance of L. radiata, while the drought resistant effect was more remarkable with the increase of pretreatment with different CaCl₂. Lower concentration of SA and SNP could significantly improve the drought resistance of L. radiata, while higher concentrations would lead poisonous effects. Comprehensive evaluation of osmotic regulation substance, membrane system and antioxidant enzymes activity suggested that 10 mmol·L^-1CaCl₂, 2 mmol·L^-1 SA and 0.5 mmol·L^-1 SNP were the suitable pretreatment to enhance the drought resistance of L. radiata.

Key words: calcium chloride; salicylic acid; nitric oxide; drought stress; Lycoris radiata