ZHU Yuqing,YANG Zaiqiang.Effects of High Temperature and High Humidity on Stomatal and Photosynthesis Characteristics of Grape Leaves in Greenhouse[J].Northern Horticulture,2017,41(23):94-101.[doi:10.11937/bfyy.20171451]
高温高湿对设施葡萄叶片气孔和光合特性的影响
- Title:
- Effects of High Temperature and High Humidity on Stomatal and Photosynthesis Characteristics of Grape Leaves in Greenhouse
- Keywords:
- stomatal characteristics; grape; stomatal conductance; photosynthesis characteristics; transpiration rate
- 文献标志码:
- A
- 摘要:
- 以设施葡萄“红提”为试材,利用人工控制环境试验,设置昼温30 ℃,空气相对湿度(70±5)%(T1),35 ℃、(80±5)%(T2),40 ℃、(90±5)%(T3)为处理。以昼温25 ℃,空气相对湿度(60±5)%为对照(CK),所有处理夜温为18 ℃。测定了不同处理的葡萄叶片气孔和光合参数,分析了高温高湿复合灾害对设施葡萄叶片气孔和光合特性的影响。结果表明:气孔特征在高温高湿的处理下发生变化,T1、T2的气孔尺寸、开度等指标随着高温高湿的加剧略有下降,气孔密度则相反;T3变化最为明显,叶片气孔尺寸,气孔开度和气孔开张比等指标在8 d时比CK分别减小了约20%、60%和50%,气孔密度增加了40%。叶片净光合速率的大小顺序为CK>T1>T2>T3。其中,叶片气孔导度和蒸腾速率的变化随着高温高湿的加剧呈现正相关关系。处理T3的气孔导度和蒸腾速率最小,分别为0.026 mol?m-2?s-1、0.72 g?m-2?h-1。因此,过高的温度和湿度会导致气孔导度、净光合速率和蒸腾速率的大幅下降,该研究结果可为设施葡萄温湿度调控提供参考依据。
- Abstract:
- Vitis vinifera L.cv.Hongti was used as material.Three levels of daily maximum temperature and relative humidity were set,30 ℃ and (70±5)% (T1),35 ℃ and (80±5)% (T2),as well as 40 ℃ and (90±5)% (T3).25 ℃ and (60±5)% was as CK.The stomatal and photosynthesis characteristics of grape leaves were measured to study the effects of high temperature and high humidity on stomata characteristics and photosynthesis characteristics of grape leaves.The results showed that the stomata size and stomatal opening in the treatment of high temperature and high humidity under T1,T2 had increased slightly,and the change of stomatal density were opposited.The stomata characteristics of T3 changed obviously,the stomata size,stomatal opening,and ratio of stomatal opening and closure reduced by about 20%,60% and 50%,respectively,at 8 days,while the stomatal density increased by 40%,compared to CK.The order of the net photosynthetic rate on grape leaf was CK>T1>T2>T3.The changes of stomatal conductance and transpiration rate were positively correlated with the increase of high temperature and humidity.Meanwhile,the stomatal conductance and transpiration rate of T3 was the lowest,they were 0.026 mol?m-2?s-1 and 0.72 g?m-2?h-1,respectively.Therefore,high temperature and high humidity could cause stomatal conductance,transpiration rate and net photosynthetic rate dropped significantly.The results provided anevidence for the control of temperature and humidity in greenhouse grapes.
参考文献/References:
[1]陈伊娜,卢章明,谢静杰,等.高温高湿生态区稻谷储存期间品质变化研究[J].粮食储藏,2015(5):31-36.
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备注/Memo
第一作者简介:朱雨晴(1993-),女,硕士研究生,研究方向为设施农业气象。E-mail:2806217750@qq.com.