摘要
探讨5个浓度0、0.5、1.0、5.0、10.0 mmol/L的外源甜菜碱对100 mmol/LNaCl胁迫下杜梨种子萌发、幼苗生长及其生理特性的影响,以不添加甜菜碱的处理作为对照.结果表明,甜菜碱处理对盐胁迫下杜梨种子发芽、幼苗生长及生理代谢均有显著促进作用.其中以1.0 mmol/L浓度处理的效果最显著,杜梨种子的萌发率、发芽势、幼苗株高、地上部鲜重、叶片超氧化物歧化酶、过氧化物酶和过氧化氢酶活性、叶绿素含量、净光合速率均显著高于对照和另外3个浓度处理;丙二醛含量均低于对照和另3个处理.
Abstract
The effects of five concentrations of exogenous betaine(0,0.5,1.0,5.0,10.0 mmol/L)on the seeds germination,seedling growth,and physiological characteristics of Pyrus betulaefolia under 100 mmol/L NaCl were investigated,with the treatment without betaine as the control.The results indicated that treatments with exogenous betaine at various concentrations signif-icantly promoted the germination of P.betulaefolia seeds and the aboveground growth of seedlings under salt stress,with the treatment of 1.0 mmol/L betaine showing the most significant impact.The germination rate and germination potential,seedling height,aboveground fresh weight,leaf su-peroxide dismutase,peroxidase and catalase activities,chlorophyll content,and net photosynthetic rate were significantly higher than those of the control and the other three treatments;while the MDA content was lower than that of the control and the other three treatments.
维普
万方数据