磷对海水抑制芦荟幼苗生长的缓解效应

 研究了不同磷水平对海水胁迫下库拉索芦荟(Aloe vera)幼苗干物质积累、叶片伸长速率、叶绿素含量、叶片细胞膜透性、根系活力和K+、Na+、Ca2+、Mg2+、Cl- 含量的影响。结果表明，30％浓度海水胁迫下，外源磷水平的提高能明显增加芦荟幼苗植株的干重, 显著提高其叶片伸长速率、叶绿素含量和根系活力，降低叶片电解质渗漏率。且增磷显著降低根系Na+、Cl- 含量，促进K+、Ca2+ 向地上部运输，维持叶片较高的K+/ Na+ 、Ca2+/ Na+ 和SK,Na, 从而改善其地上部的离子平衡，明显缓解30%海水对芦荟幼苗生长的抑制作用。

Alleviatory Effects of Phosphorus on Growth Inhibition of Seawater-Stressed Aloe Seedlings

Effects of different P levels on dry matter accumulation, leaf elongation rate, chlorophyll content, root vigor, K+, Na+, Ca2+, Mg2+, Cl-contents of aloe seedings under 30% concentration of seawater were studied. The results showed that addition of P increased significantly plant dry weight, promoted markedly leaf elongation rate, chlorophyll contents and root vigor, decreased the electrolytic leakage of leaves. Addition of P also decreased significantly Na+, Cl- contents, promoted K+, Ca2+ transport to shoot, maintained high K+/ Na+ ,Ca2+/ Na+ and SK,Na in aloe leaves, improved ion homeostasis in leaves, this was one of the main causes of the alleviatory effects of P on growth inhibition of seawater-stressed aloe seedlings.