Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (3): 657-660.DOI: 10.11733/j.issn.1007-0435.2014.03.033

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Impacts of Heat Stress on the Photosynthetic Physiology of Alfalfa

LIU Da-lin, ZHANG Hua, CAO Xi-chun, HU Kai-qi, LIU Zhao-ming, WANG Kui, YANG Jun-qiao   

  1. College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province 225009, China
  • Received:2013-05-24 Revised:2013-08-06 Published:2014-06-04

夏季高温胁迫对紫花苜蓿光合生理机制的影响研究

刘大林, 张华, 曹喜春, 胡楷崎, 刘兆明, 王奎, 杨俊俏   

  1. 扬州大学动物科学与技术学院, 江苏 扬州 225009
  • 作者简介:刘大林（1963- ），男，江苏兴化人，博士，副教授，主要从事草业科学教学与研究工作，E-mail：jsdalin@163.com
  • 基金资助:

    2010江苏省科技支撑计划（农业）项目（E2010308）；江苏高校优势学科建设工程项目资助

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Abstract:

The influence of heat stress on the chlorophyll contents and conductivity of different alfalfa varieties were investigated using a field experiment. Results indicated that the chlorophyll content rates of different alfalfa varieties were reduced (12.04%~34.87%) under heat stress. The conductivities of all tested varieties were significantly affected by heat stress. Comprehensive analysis showed that Sidel, Alfalfa King, and CUF101 had stronger heat resistance, whereas Algonquin and WL612 had poorer heat resistance.

Key words: Alfalfa, Heat stress, Chlorophyll content, Conductivity

摘要：

通过研究紫花苜蓿（Medicago sativa）不同品种在夏季高温下叶绿素含量和电导率的变化特征， 计算出各品种的半致死温度，评价其对夏季高温的耐受力。结果表明：高温导致不同苜蓿品种叶绿素含量不同程度的降低（12.04%～34.87%），高温对不同苜蓿的相对电导率影响较大。综合分析认为，赛迪、苜蓿王和CUF101为强抗热性品种，阿尔冈金和WL612为抗热较差品种。

关键词: 苜蓿, 高温胁迫, 叶绿素含量, 电导率

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