抗旱小麦的冷温特征及其生理特性分析  

Analysis on Lower Canopy Temperature and Physiological Characteristics of Drought resistant Wheat

作　　者：冯佰利[1] 张宾[1] 高小丽[1] 高金峰[1] 王长发[1] 张嵩午[1] 

机构地区：[1]西北农林科技大学,陕西杨凌712100

出　　处：《作物学报》2004年第12期1215-1219,共5页Acta Agronomica Sinica

基　　金：国家自然科学基金重大项目 (3 0 2 3 0 2 3 0 );国家自然科学基金 (3 9870 477)共同资助。

摘　　要：选择抗旱与旱敏感两种类型的小麦品种 ,通过测定群体冠层温度、功能叶片净光合速率、叶片功能持续期以及超氧化物歧化酶活性、丙二醛含量等参数 ,研究了小麦品种的冷温特性及其与各参数间的关系。结果表明 ,在籽粒灌浆期间 ,抗旱小麦品种群体冠层温度持续偏低 ,它的叶片功能期、净光合速率、蒸腾速率、超氧化物歧化酶活性等性状明显优于旱敏感小麦品种 ,在籽粒灌浆后期表现尤为明显。因此 ,在生产中 ,冠层温度可以作为衡量旱地小麦代谢功能的指标 ,并将为旱地小麦品系、品种的选择和高产栽培提供依据。Drought resistant and drought susceptible wheat cultivars were used to investigate their lower canopy temperature and some physiological characteristics by measuring their corresponding canopy temperature, net photosynthetic rate and duration of function leaves, activity of SOD and MDA content. The results showed that canopy temperature was continuously lower in drought resistant wheat cultivars than in drought susceptible ones, especially during kernel filling period. Many of the physiological characteristics such as the functional period of leaves, net photosynthetic rate, SOD activity and MDA content in the former were superior to those in the latter. Therefore, the low canopy temperature could be used as an index to evaluate physiological capacities and to be applied to the breeding and high yield production of wheat in dry region.

关 键 词：抗旱小麦 冠层温度 生理特性 

分 类 号：S512[农业科学—作物学]