聚乙二醇模拟干旱对耐低钾水稻幼苗光合特性的影响  

Effects of Drought Stress Simulated by Polyethlene Glycol on Photosynthetic Characteristics in Low Potassium Tolerant Rice Seedlings

作　　者：戴高兴[1] 彭克勤[1] 邓国富[2] 萧浪涛[1] 张雪芹[1] 

机构地区：[1]湖南农业大学湖南省植物激素与生长发育重点实验室,湖南长沙410128 [2]广西农业科学院水稻研究所,广西南宁530007

出　　处：《中国水稻科学》2008年第1期99-102,共4页Chinese Journal of Rice Science

基　　金：湖南省计委资助项目[湘计科352-6]

摘　　要：以早籼品种瑰宝8号及其变异后代耐低钾水稻为材料,用20%PEG6000模拟干旱,对幼苗光合特性进行了研究,并对测定指标进行相关性分析。模拟干旱胁迫下,耐低钾水稻幼苗具有相对较高的钾含量、钾素利用效率、生物量、水势、光合速率、气孔导度和胞间CO2浓度。相关分析表明,水稻幼苗钾含量和钾素利用效率与生物量、光合速率、气孔导度、胞间CO浓度和水势呈显著正相关。Photosynthetic characteristics were measured and correlation analysis among these characteristics were made in the earlyindica rice variety, Guibao 8, and its mutant tolerant to low potassium under 20% PEG6000-simulated drought stress. Compared with Guibao 8, the mutant showed higher biomass, potassium content and potassium use efficiency, water potential, photosynthetic rate, stomatal conductance and intercellular CO2 concentration. The correlation analysis showed that potassium content, potassium use efficiency were significantly and positively correlated with biomass, water potential, photosynthetic rate, stomatal conductance, intercellular CO2 concentration in rice seedlings.

关 键 词：水稻 干旱胁迫 钾素利用效率 光合作用 抗旱性 耐低钾突变体 

分 类 号：S511[农业科学—作物学]