干旱条件下喷施独脚金内酯对小麦光合特性、抗氧化能力和产量的影响

摘要： 干旱条件下，在小麦开花初期叶面喷施独脚金内酯类似物（GR24），研究干旱条件下独脚金内酯对小麦叶片光合特性、抗氧化能力和产量的影响，为干旱条件下小麦的生产管理提供理论与技术支撑。结果表明，在干旱条件下，喷施独脚金内酯总体上可提高小麦旗叶的叶绿素含量、净光合速率、胞间CO2浓度、超氧化物歧化酶活性、过氧化氢酶活性、可溶性蛋白含量，降低小麦旗叶的气孔导度、蒸腾速率、丙二醛及脱落酸含量，提高籽粒千粒质量和产量，产量提高幅度为5.7%~7.4%。

关键词: 小麦, 干旱, 独脚金内酯, 产量, 光合特性, 抗氧化能力

Abstract: In order to provide theoretical and technical support for wheat production management under drought condition,the strigolactone analog GR24 was sprayed on the leaf of wheat at the early flowering stage,and the effects of spraying strigolactone on photosynthetic characteristics,antioxidant capacity and yield of wheat under drought condition were studied. The results showed that,under drought condition,spraying GR24 could generally improve the flag leaf chlorophyll content, net photosynthetic rate, intercellular CO2concentration,superoxide dismutase activity,catalase activity and soluble protein content,decrease stomatal conductance,transpiration rate,malondialdehyde content and abscisic acid content,and increase the thousandgrain weight and yield with the increase rate of 5.7%—7.4%.

Key words: Wheat, Drought, Strigolactone(SL), Yield, Photosynthetic characteristics, Antioxidant capacity

中图分类号: 

S512.1　

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