盐胁迫条件下竹柳光合作用日变化特征研究  

Study on Photosynthetic Diurnal Variation of Salix matsudana Under Salt Stress

作　　者：赵育鹏 ZHAO Yu-peng(Shanxi Academy of Forestry and Grassland Sciences,Taiyuan,Shanxi 030012)

机构地区：[1]山西省林业和草原科学研究院,山西太原030012

出　　处：《安徽农业科学》2024年第4期87-89,共3页Journal of Anhui Agricultural Sciences

摘　　要：以竹柳盆栽苗木为试验材料,分析其在不同盐分浓度下的净光合速率、气孔导度、蒸腾速率、胞间CO_(2)浓度等光合生理指标的日变化特征。结果表明:竹柳在对照与轻度胁迫条件下,净光合速率的日变化特征表现为双峰型;在中度和重度胁迫条件下,为单峰型曲线,变化趋势表现为先上升后下降。气孔导度在对照与轻度胁迫条件下的日变化特征表现为双峰型;在中度和重度胁迫条件下为单峰型曲线,呈逐渐下降的趋势。蒸腾速率的日变化特征与气孔导度类似。各胁迫处理胞间CO_(2)浓度均较对照高,且随胁迫程度的加剧,胞间CO_(2)浓度也随之上升。The Salix matsudana were used as experimental material to study the effect of salt stree on the photosynthetic diurnal variation.The results showed that the photosynthetic rate of Salix matsudana showed a bimodal type in the standard contrast and mild stress conditions,while showed a single peak type in the moderate and severe stress condition with a trend first rise then falling.The stomatal conductance showed a bimodal type in the standard contrast and mild stress conditions,while showed a single peak type in the moderate and severe stress conditions with a trend of gradual decline.The daily variation trends of transpiration rate was similar with the stomatal conductance.The intercellular CO_(2)concentration under stress treatment were higher than the standard contrast,and increased with the salt stress levels.

关 键 词：竹柳 盐胁迫 净光合速率 气孔导度 蒸腾速率 胞间CO_(2)浓度 日变化 

分 类 号：S718[农业科学—林学]