作　　者： ; ; (高树杰）;

机构地区： 长江大学园艺园林学院

出　　处： 《长江大学学报（自科版）（中旬）》 2010年第4期52-55,共4页

摘　　要： 模拟淹水胁迫处理及胁迫解除过程,设计浅淹(V1)、淹没(V2)、经淹没后半出露(V3)、经淹没后完全出露(V4)和对照(CK)5种处理,测定了各处理下李氏禾(Leersia herxandra)的根长、根表面积、根直径、根体积等根系生长参数。结果表明,(1)李氏禾的根长、单位体积根长、根表面积、根投影表面积等根系生长参数随处理发生变化,且均表现为V1>CK>V2>V3>V4,V1条件下的各参数极显著高于其他各处理。(2)V1条件下李氏禾的根长、单位体积根长是V2时的3倍,但V2、V3与CK差异不显著。(3)李氏禾植株根的直径V2>V1>CK>V3>V4,V1和V2之间差异不显著,但均显著高于CK,V3、V4与CK相比没有显著差异。(4)李氏禾根体积V1>V2>CK>V3>V4,V1极显著高于其他处理,V3、V4则显著低于V2和CK。 Leersia herxandra was a kind of grass with high survival rate under condition of submerging and drought.Five treaments were simulated,which were growing in test field without controling (CK),waterlogged (V1),submerging (V2),raising from bottom to middle after submerging (V3) and revelation after submerging (V4).The root growth parameters of L.herxandra were mensurated under condition of the above-stated 5 treaments.Results showed that:(1) The root length,root lenpervol,root surfarea and root projsurfarea of L.herxandra were dynamically subjected to flooding stress and rescission of stress,and their value were V1>CK>V2>V3>V4.Moreover the value of V1 were more significant than those of the other treaments.(2) The root length and the root lenpervol of L.herxandra subjected to V2 were 3 times of that subjected to V1,but the differences between V2,V3 and CK were not significant.(3)The root avgdiam value of L.herxandra were V2>V1>CK>V3>V4.Both value of V1 and V2 were significantly more than CK,while the differences between V2 and V1 were not significant.Also there were not significant differences between V3,V4 and CK.(4)The rootvolume value of L.herxandra were V1>V2>CK>V3>V4,and differences among V1 and other treaments were the extremely significant.Both the rootvolume value of V3 and V4 were significantly lower than those of V2 and CK.

关 键 词： 李氏禾 淹水胁迫 胁迫解除 根系生长参数

领　　域： [生物学]