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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 annual seedlings of Caragana korshinskii were used as test materials, and mild, moderate and severe flooding stress treatments were set up. The effects of different degrees of flooding stress on chlorophyll fluorescence parameters, peroxidase POD activity, malondialdehyde (MDA) content, chlorophyll content and leaf water content and other physiological and biochemical parameters. The results showed that with the increase of the depth of flooding, the stress injury of Cydonia bungei increased gradually. After 6 days of flooding treatment, the heavily flooded double-pod cassia plants have all died. After one month’s waterlogging stress treatment, the Fo, Fv / Fm and qN of mild flooding group and moderate flooding group decreased compared with the control group, while the ETR, Fv ’/ Fm’ Decreased. POD activity increased first and then decreased with the extension of stress time. Leaf water content and MDA content increased significantly compared with the control group, chlorophyll content was lower than the control. After 12 months of waterlogging stress, the numbers of cassia seedlings in mild water flooding group and medium water flooding group still grew well, and many aerial roots were formed to adapt to flooding environment.