不同盐分条件下金光杏梅幼苗生长和光合特性研究

Studied of Growth and Photosynthesis in Jinguang Plum Seedlings under Different Salt Stresses

研究了不同程度盐胁迫对金光杏梅幼苗生长和光合特性的影响。结果表明:盐胁迫抑制了金光杏梅幼苗的生长,随着盐浓度的升高,金光杏梅的株高、叶面积、叶鲜重、叶干重、茎干重、根干重均显著降低;叶片叶绿素含量、净光合速率、蒸腾速率、气孔导度亦显著降低,且盐浓度越高,下降幅度越大;细胞间隙CO2浓度随着盐浓度增加而增大,表明盐胁迫下非气孔因素是导致金光杏梅叶片光合速率下降的主要原因。

Using potted Jinguang plum seedlings as material,effect of salt stress on the growth and photosynthesis of seedlings were studied.The results showed that the growth of Jinguang plum seedlings were remarkably restrained by salt stress.With the increasing of salt concentration,the plant height,leaf area,leaf fresh weight,leaf dry weight,stem dry weight and root dry weight were remarkably decreased,and the chlorophyll content,photosynthesis rate,transpiration rate and stomatic conductance in leaves were declined too,but the intercellular CO2 concentration was inclined.The primary reason of the decrease of photosynthesis rate was nonstomatic factor under salt stress.