盐胁迫对锦带花幼苗生长特性的影响

Effect of Salt Stress on the Seedling Growth of Weigela florida

以锦带花为材料,采用盆栽法研究了不同土壤盐质量分数对锦带花生长的影响.结果表明：锦带花在盐质量分数≤0.3%时,盐胁迫对其生物量、相对新梢生长量及根冠比的抑制作用不显著,在盐质量分数为0.1%时还略有增加,当盐质量分数为0.4%时才显著下降.随着土壤盐质量分数的增加,叶片及根部的相对含水率逐渐减少,细胞膜透性及丙二醛含量逐渐增大.脯氨酸的含量在盐质量分数≤0.4%时呈现逐渐增加的趋势,在盐质量分数为0.5%时有所下降.可溶性糖含量变化趋势与脯氨酸基本一致.因此可知锦带花具有一定的耐盐性.

Effect of salt stress on the growth of Weigela florida was studied.The results showed that the effects of salt stress on the biomass,root/shoot ratio and the growth of new tress were not significant when mass fraction of salt ≤ 0.3%.There was a little increase on the biomass when mass fraction of salt was 0.1%.When the mass fraction of salt was 0.4%,they decreased obviously.The water content decreased gradually but the electrolyte leakage and MDA increased gradually with the increasing of mass fraction of salt.The content of proline increased gradually while the mass fraction of salt ≤0.4%,but decreased when the mass fraction of salt was 0.5%.