摘要
以一年生双荚决明实生苗为试材,设置了轻度、中度、重度淹水胁迫处理,研究了不同程度的淹水胁迫处理对双荚决明的叶绿素荧光参数、过氧化物酶(POD)活性、丙二醛(MDA)含量、叶绿素含量以及叶片含水量等生长及生理生化指标的影响。结果表明:随着淹水深度的加大,双荚决明植株受到的胁迫伤害逐渐增大。淹水处理6d后,重度水淹的双荚决明植株已全部死亡。经过1个月的淹水胁迫处理,轻度水淹组和中度水淹组的Fo、Fv/Fm、qN相比对照组均有所下降,而ETR、Fv′/Fm′呈现先上升后下降的趋势;POD活性随着胁迫时间的延长先上升后下降。叶片含水量和丙二醛含量相比对照组明显上升,叶绿素含量则低于对照。在淹水胁迫处理12个月后,轻度水淹组和中度水淹组双荚决明依然生长良好,长出许多气生根来适应淹水环境。
The chlorophyll fluorescence parameters,peroxidase（POD）,malondialdehyde（MDA）,chlorophyll content,leaf water content and growth of Cassia bicapsularis seedlings were determined after treated with waterlogging stress.The results showed that with the increase of water depth,the injury of stress of Cassia bicapsularis plants gradually increased.After waterlogging treatment for 6days,severely flooded plants all died.After a month of waterlogging stress,Fo,Fv/Fm,qN of mild group and moderate waterlogging group plants decreased compared with the control group,while ETR,Fv′/Fm′downward after the first rise trends,POD activity increased first as the stress time,then decreased.Leaf water content and MDA content increased significantly compared with the control group,the chlorophyll content was lower than the control group.After waterlogging treatment for twelve months in,mild waterlogging and moderate waterlogging group plants still grew well and grew many aerial rooting to adapt to waterlogging environment.
作者
蔡思琪
廖飞勇
CAI Siqi LIAO Feiyong(College of Landscape Architecture,Central South University of Forestry and Technology ,Changsha, Hunan 410004)
出处
《北方园艺》
CAS
北大核心
2017年第3期71-75,共5页
Northern Horticulture
基金
湖南省教育厅重点资助项目(15A195)
湖南省研究生科技创新资助项目(CX2016B324)
中南林业科技大学研究生科技创新基金资助项目(CX2016810)
关键词
双荚决明
水淹胁迫
生理特性
气生根
Cassia bicapsularis
waterlogging stress
physiological characteristics
aerial roots
