摘要
以国内常用的6个草地早熟禾品种为材料,研究了干旱胁迫条件下叶片相对含水量、电导率、游离脯氨酸、丙二醛含量和叶绿素含量等生理指标对干旱胁迫的响应,探讨了各种生理变化与抗旱性的关系,并利用隶属函数法对抗旱性进行了综合评价。结果表明,6个草地早熟禾的相对含水量、叶绿素含量随水分胁迫时间的延长呈减少趋势,而相对电导率、游离脯氨酸和丙二醛含量呈增加趋势。通过隶属函数分析,6个草地早熟禾的抗旱性大小顺序为蓝鸟>解放者>午夜>优异>优美>肯塔基。
Five physiological indices including relative water content of leaves, electrical conductivity rate, proline content, chlorophyll content and malondialdehyde content were measured under drought stress. Physiological changes to drought resistance capacity were comprehensively evaluated on different varieties of poa prtensis L. and discussed. The results showed that with the water stress time prolonged, the leaf relative water content and chlorophyll content of each species decreased, while the electrical conductivity rate, proline content and MAD content increased. Comprehensive analysis indicated that the order of drought tolerance of this species was Blue moon 〉Liberator〉 Midnight〉 Merit〉 Euromyth〉 Kentucky.
出处
《草业与畜牧》
2009年第6期37-41,共5页
Pruataculture & Animal Husbandry
基金
云南农业大学青年基金"云南省抗旱节水型草地早熟禾地引进
筛选与推广应用(YNDKKY0711)"部分研究内容
关键词
草地早熟禾
抗旱性
脯氨酸含量
叶片含水量
Poa pratensis L.
Drought resistance
Content of free proline
Relative water content of leaves
