摘要
以金光杏梅盆栽幼苗为试材,研究了干旱胁迫对金光杏梅叶片渗透调节物质含量和光合作用日变化的影响。结果表明:随着干旱胁迫程度的增加,金光杏梅叶片相对含水量和叶绿素含量都明显降低;细胞质膜透性、丙二醛(MDA)、可溶性糖、脯氨酸(Pro)的含量显著增加;叶片净光合速率、蒸腾速率和气孔导度等都随着干旱胁迫的加重而降低,细胞间隙CO2浓度随着干旱胁迫的加重而升高;轻度干旱胁迫下,气孔限制是净光合速率降低的主要原因;严重干旱胁迫下,非气孔限制是净光合速率降低的主要原因。
Using potted Jinguang plum seedling as material, the content of osmotic adjusting substance and the diurnal variation of photosynthesis in Jinguang plum leaves were studied. The results were as follows ： with the increase of drought stress degree, the relative water content and chlorophyll content in leaves were decreased, but the permeability of plasma membrane and the content of MDA, soluble sugar and proline in leaves were increased ; And with the development of drought stress, the photosynthesis rate, transpiration rate and stomatal conductance were declined, and intercellular CO2 concentration was raised ; The main reason for the decrease of photosynthesis rate were stomatal limitation in light drought stress, and nonstomatal limitation in severe drought stress.
出处
《华北农学报》
CSCD
北大核心
2008年第1期119-122,共4页
Acta Agriculturae Boreali-Sinica
基金
河南科技学院重点资助项目(040109)
关键词
金光杏梅
干旱胁迫
渗透调节物质
光合作用
Jinguang plum
Drought stress
Osmotic adjusting substance
Photosynthesis
