温度对匍匐翦股颖2个品种光合特性和抗氧化酶活性的影响

温度对匍匐翦股颖2个品种光合特性和抗氧化酶活性的影

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戚甫友;赵钢

【期刊名称】《华南农业大学学报》 【年(卷),期】2011(032)001

【摘要】选用匍匐翦股颖Agrostis stolonifera 品种粤选一号和Penncross为试验材料,在人工控制环境18、25、30、35和40℃温度下处理24 h后,测定其净光合速率、叶片蒸腾速率、气孔导度、胞间CO2浓度及超氧化物歧化酶(SOD)和过氧化物酶(POD)活性等6个光合生理指标,结果表明:2个品种的净光合速率随温度的升高而降低;30℃温度处理下,冷季型草坪草净光合速率的变化由气孔因素决定,35和40℃时由非气孔因素控制;短期亚高温胁迫下,植物可通过调节自身的相关反应来抵抗高温带来的伤害,避免净光合速率下降过快.?fects of temperature on the photosynthetic characteristics of two cultivars of Agrostis stolonifera were studied. The net photosynthetic rate, transpiration ratio, stomatal conductance, activity of POD and SOD, and intercellular CO2 concentration were measured. The results showed that:Net photosynthetic rates of turfgrass decreased with higher temperature; Net photosynthetic rates of turfgrass was affected by stomatal factors under 30 ℃, but it was affected mainly by non-stomatal factors when the temperature was over 35 ℃ ;The turfgrass which suffered sub-high temperature stress for a short time could adjust by itself to adapt to the changed environment, and to avoid rapid