多年生黑麦草对干旱-低温交叉适应的生理响应

doi:10.11686/cyxb2015230

草业学报 ›› 2016, Vol. 25 ›› Issue (1): 163-170.DOI: 10.11686/cyxb2015230

多年生黑麦草对干旱-低温交叉适应的生理响应

梁小红¹, 艾非凡¹, 钟天秀², 韩烈保^1*

1.北京林业大学草坪研究所,北京 100083;
2.华南农业大学林学与风景园林学院草业科学系,广东省草业工程技术研究中心,广东广州 510642

收稿日期:2015-05-04 出版日期:2016-01-20 发布日期:2016-01-20
通讯作者: *通信作者Corresponding author. E-mail:hanliebao@163.com
作者简介:梁小红(1979-),女,满族,辽宁本溪人,实验师,硕士。E-mail:liang81511@163.com
基金资助:
国家林业局“948”项目(2011-4-50),国家自然科学基金面上项目(31172255)和国家863计划(2013AA102607)资助

Cross adaptation under drought and low temperature stress in perennial ryegrass

LIANG Xiao-Hong¹, AI Fei-Fan¹, ZHONG Tian-Xiu², HAN Lie-Bao^{1, *}

1.Institute of Turfgrass Science, Beijing Forestry University, Beijing 100083, China;
2.College of Forestry and Landscape Architecture, South China Agricultural University, Guangdong Engineering Research Center of Grassland Sciences, Guangzhou 510642, China

Received:2015-05-04 Online:2016-01-20 Published:2016-01-20

摘要/Abstract

摘要： 草坪草在冬季的时候常常面临着干旱和低温的双重胁迫,严重影响着春季返青时草坪草的质量。为了探讨多年生黑麦草的干旱-低温胁迫交叉适应的生理机制,以多年生黑麦草“爱神特(Accent)”为植物材料,设置3个水分梯度,土壤相对含水量分别为30%(重度胁迫)、60%(中度胁迫)、100%(良好浇水)。处理5 d后在人工气候箱中进行低温处理(2℃)15 d。低温胁迫使多年生黑麦草的叶片相对含水量、叶绿素含量显著降低,电解质渗漏、脯氨酸、可溶性总糖、抗氧化酶的含量增加。3种水分处理条件下,经过中度干旱处理后的多年生黑麦草的叶片相对含水量、叶绿素含量的降低幅度减小,但脯氨酸、可溶性糖、抗氧化酶的含量增加显著。实验结果表明多年生黑麦草对干旱-低温胁迫具有交叉适应能力。适当地进行干旱处理有利于提高多年生黑麦草对低温胁迫的适应能力。但值得注意的是,严重的干旱处理会造成过度伤害,致使植株更快死亡。

Abstract: Turfgrass suffers from both drought and cold stress in winter which degrades turf quality in the following spring. In order to investigate the physiological mechanism of cross adaptation to drought and low temperature stress in perennial ryegrass “Accent” turf ryegrass was subjected to three watering regimes (30%, 60% and 100% of requirements) for 5 days and then exposed to 2℃ temperatures day and night for 15 days. The results showed that low temperature stress decreased the relative water content (RWC) and chlorophyll (Chl) content but increased electrolyte leakage (EL), proline, soluble sugar and antioxidant enzymes. Mild drought stress before exposure to cold stress produced a significantly lower reduction in RWC and Chl content but increased osmotic adjustment and antioxidant enzymes. It was concluded that moderate drought prior to exposure to low temperatures helped perennial ryegrass adapt to low winter temperatures but severe drought caused considerable damage to plants.

梁小红, 艾非凡, 钟天秀, 韩烈保. 多年生黑麦草对干旱-低温交叉适应的生理响应[J]. 草业学报, 2016, 25(1): 163-170.

LIANG Xiao-Hong, AI Fei-Fan, ZHONG Tian-Xiu, HAN Lie-Bao. Cross adaptation under drought and low temperature stress in perennial ryegrass[J]. Acta Prataculturae Sinica, 2016, 25(1): 163-170.

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多年生黑麦草对干旱-低温交叉适应的生理响应

Cross adaptation under drought and low temperature stress in perennial ryegrass

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