摘要
采用土培的方法,通过对高羊矛幼苗进行水分预胁迫、解除胁迫、再胁迫处理,研究了水分预胁迫对干旱条件下高羊茅光合特性的影响.结果表明,经水分预胁迫的高羊茅能够更好地利用有限的水分,光合速率、气孔导度、胞间二氧化碳浓度、蒸腾速率下降幅度均低于未经预胁迫的高羊茅,水分预胁迫缓解了干旱对高羊茅光合特性的影响.
With the method of soil culture,pretreatment,rewatering and water restress on tall fescue were carried out to study the effects of pretreatment on photosynthesis of tall fescue under drought stress.The results showed that pretreatment of water stress could make tall fescue acclimatize itself to the water restress quickly and decrease water stress doing harm to photosynthesis of tall fescue..Pretreatment of water stress could stand against the decreases of photosynthetic rate,stomatal conductance,intercellular CO2 concentration and transpiration rate,and enhance the water use efficiency of the wheat under water restress.The results suggest that pretreatment of water stress can prevent the changes of photosynthetic characteristics of tall fescue when the same stress recurs.
出处
《辽宁大学学报（自然科学版）》
CAS
2011年第4期329-331,共3页
Journal of Liaoning University：Natural Sciences Edition
基金
国家自然科学基金(No.31070285)
关键词
水分预胁迫
高羊茅
光合作用
pretreatment of water stress
tall fescue
photosynthesis
