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以上海崇明东滩入侵植物互花米草与本地种芦苇为研究对象,研究持续淹水胁迫对两种植物光合色素含量的影响.结果表明:互花米草与芦苇叶片的光合色素基本组成与含量不同,对持续淹水的响应也不同.在持续淹水胁迫下,互花米草叶绿素a、叶绿素b及类胡萝卜素含量降低,叶绿素a/b、类胡萝卜素/叶绿素值提高;芦苇各色素含量升高,叶绿素a/b、类胡萝卜素/叶绿素值基本保持稳定.解除持续淹水胁迫后,互花米草各色素含量逐渐升高,叶绿素a/b、类胡萝卜素/叶绿素值降低,并逐渐接近对照水平;而芦苇各色素含量显著高于对照.两种植物均表现出一定的补偿效应,但芦苇比互花米草更能适应同等程度的持续淹水胁迫.应用持续淹水措施治理互花米草时,可采用本地种芦苇作为治理后湿地恢复的替代植物.
In order to study the effects of continuous waterlogging on photosynthetic pigment content of two plant species, the invasive plant Spartina alterniflora and native species of Reed silage in the East Bank of Chongming Island, Shanghai were studied.The results showed that the photosynthetic pigment content of Spartina alterniflora and Phragmites communis The content of chlorophyll a, chlorophyll b and carotenoid of Spartina alterniflora decreased, chlorophyll a / b, carotenoid / chlorophyll value increased; The contents of chlorophyll a / b, carotenoid and chlorophyll remained stable after the continuous flooding stress was relieved, and the contents of chlorophyll a / b and carotenoid / chlorophyll decreased , And gradually approached the control level, but the pigment content of Phragmites australis was significantly higher than that of the control.The two plants showed some compensatory effects, but Phragmites australis than Spartina alterniflora to adapt to the same degree of continuous waterlogging stress.Application of continuous flooding Measures to control Spartina alterniflora native species of reed can be used as an alternative plant for the restoration of wetlands after treatment.