4个野生早熟禾属草种的耐热性研究  

Studies on the Heat Tolerance of 4 Wild Grasses of Poa L.

作　　者：颜丽丽[1] 韩烈保[1,2] 

机构地区：[1]北京林业大学草坪研究所暨森林培育与保护省部共建实验室,北京100083 [2]长江大学园艺园林学院,湖北荆州434025

出　　处：《中国农学通报》2009年第6期120-125,共6页Chinese Agricultural Science Bulletin

基　　金："十一五"国家科技支撑项目"农林动植物育种工程-优质抗逆专用高羊茅;早熟禾新品种选育"(2006BAD01A19-4);北京市教育委员会学科建设与研究生培养项目资助-产学研联合培养研究生基地-北京城市生态环境建设

摘　　要：以草地早熟禾栽培种"午夜"为对照,通过测定高温胁迫下4个野生早熟禾属草种的几项生理指标,探讨了半致死温度、叶片细胞质膜透性、叶片脯氨酸含量以及叶片丙二醛含量等生理指标的变化特征。结果表明草地早熟禾、硬质早熟禾、细叶早熟禾、早熟禾和"午夜"的半致死温度分别为56.56℃、55.95℃、53.78℃、52.88℃和56.09℃;高温胁迫下,各草种随着胁迫程度和胁迫时间的增加,都表现为质膜透性增大,游离脯氨酸积累先增加后减少,丙二醛含量持续增长。4种草受高温胁迫时伤害的程度存在差异,耐热能力强弱依次为草地早熟禾、硬质早熟禾、早熟禾、细叶早熟禾。Taking the variety ＂mid-night＂ as the CK, Variation of several physiological indices including the lethal temperature, membrane permeability, proline accumulation and malondialdehyde of four grasses under high temperature stress was measured. The result showed that the lethal temperature of P. pratensis L., P. sphondy lodes Trin., P.annua L., P.angustifolia. L. and ＂midnight＂ was 56.56 ℃, 55.95℃, 52.88℃, 53.78℃ and 56.09℃ respectively; Cell membrane permeability and the content of malondialdehyde raised, proline accumulation were gradually increaset then decreased with the temperature grades going up. It was found that there existed some difference of heat resistance among the four grasses. The ranks of heat resistance of four grasses were P. pratensis L., P. sphondy lodes Trim, P. annua L. and P. angustifolia. L.

关 键 词：早熟禾属 耐热性 生理反应 高温胁迫 

分 类 号：S322[农业科学—作物遗传育种] S688.4[农业科学—农艺学]