盐胁迫对唐山玫瑰幼苗生长和生理特性的影响

目的]研究唐山玫瑰(Rosa rugosa)耐盐性,为抗盐植物的选育及推广应用提供理论参考。方法]采用随机区组试验,盐质量浓度梯度分别为0%(CK)、0.2%、0.4%、0.6%、0.8%,10次重复。测定指标分别为成活率、生长量、生物量、叶绿素含量、脯氨酸含量。结果]盐胁迫抑制了唐山玫瑰的新稍生长量和生物量,与地上部分相比,根系对盐胁迫更加敏感。随着盐浓度的增加,唐山玫瑰的叶绿素含量呈下降趋势,脯氨酸含量呈上升趋势;与对照相比,在盐浓度为0.6%时,叶绿素a和b的含量显著降低,脯氨酸含量显著增加。上述指标可以作为唐山玫瑰耐盐性评价的参考指标。结论]盐质量浓度达到0.6%时对唐山玫瑰的生理产生影响。

Effects of Salt Stress on Seedling Growth and Physiological Characteristics of Tangshan Rose (Rosa rugosa)

Objective] The purpose was to study Tangshan rose′s resistance to salt,and provide a theoretical reference for breeding salt-tolerance plants and their popularization and application.Method] Randomized block design was used to carry out the test with 10 repeatitivens,and slat concentration was 0%(CK),0.2%,0.4%,0.6%,0.8%,respectively.The measuring indices were survival rate,growth amount,biomass amount,chlorophyll content and proline content.Result] Salt stress inhibited Tangshan rose′s growth amount of cuttings and biomass amount,and its root was more sensitive than aboveground.With salt concentration increasing,Tangshan rose′s chlorophyll content showed a decreasing trend,while proline content showed a rising trend.And when salt concentration was 0.6%,chlorophyll a and b content decreased significantly,and proline content increased significantly.All the test indices could be used as the indicators of Tangshan rose salt-tolerance evaluation.Conclusion] That salt concentration of 0.6% has already come out impacts on Tangshan rose′s physiology.