摘要
以池杉Taxodium ascendens Brongn.和乌桕Sapium sebiferum(Linn.)Roxb.当年实生幼苗为材料,通过人为控水进行淹水胁迫,设置了对照组CK和水淹组,测定了两树种生长及生理生化等方面的指标.结果表明:淹水胁迫结束后,两树种水淹组幼苗主根长、主(粗)根数、地径、株高和株质量都显著(p<0.05)低于对照组,而乌桕在长期淹水胁迫后各生长指标(株质量除外)比池杉降低的程度更大.两树种叶绿素和类胡萝卜素的质量分数也发生了显著变化,到试验结束时,池杉幼苗叶绿素和类胡萝卜素的质量分数分别比对照组降低41.28%和35.38%;而乌桕幼苗比对照组降低68.10%和59.19%.随着淹水胁迫时间的延长,叶片丙二醛(MDA)质量分数呈上升趋势,超氧化物歧化酶(SOD)活性呈先降后升趋势,而过氧化物酶(POD)活性则一直低于对照水平.
Under the condition of water controlling and submergence stress,two different kinds of water treatments（control group and submergence group） were applied to examine the growth,physiological and biochemical characteristics of Taxodium ascendens Brongn and Sapium sebiferum（Linn.） Roxb seedlings.The result indicated that growth indices in submergence group were significantly lower than those in control group,while the growth indices（except the plant fresh weight） of S.sebiferum（Linn.） Roxb seedlings were lower than those of T.ascendens Brongn seedlings.And the chlorophyll and carotenoid had changed greatly.The chlorophyll and carotenoid of T.ascendens Brongn seedlings in submergence group respectively lowered 41.28%,35.38% than control group,and S.sebiferum（Linn.） Roxb seedlings 68.10%,59.19%.With submergence stress treatment prolonged,the content of MDA increased,the SOD activity had a change of descend firstly then ascend,but the POD activity was always lower than the controlled level.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第10期46-50,共5页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(31100464)
"十一五"国家科技支撑计划资助项目(2006BA003A13-3-2)
重庆市自然科学基金资助项目(CSTC
2008BB1100)
关键词
三峡库区
消落带
池杉
乌桕
Three Gorges Reservoir Area
water-level fluctuation-zone
Taxodium ascendens Brongn
Sapium sebiferum（Linn.） Roxb
