抗旱小麦的冷温特征及其生理特性分析

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

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

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.