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为了优选用于河岸、库岸等间歇性淹水地区植被恢复的适生树种,研究了30d完全淹水解除后互叶白千层(Melaleuca alternifolia)幼苗气体交换特性、叶绿素荧光特性和质膜透性的恢复情况。在全淹30d及退水后70d的恢复生长过程中,互叶白千层成活率为100%。经过30d的全淹处理,互叶白千层的叶绿素含量、净光合速率、气孔导度、蒸腾速率、光系统Ⅱ(PSⅡ)的最大光化学量子效率和光化学猝灭明显下降,而非光化学猝灭和质膜透性明显上升,分别为对照植株的51%、48%、45%、40%、86%、45%、163%和145%。在退水后的恢复生长过程中,互叶白千层的叶绿素含量、净光合速率、气孔导度、蒸腾速率、PSⅡ的最大光化学量子效率和光化学猝灭系数不断升高,而非光化学猝灭和质膜透性不断下降,60d后恢复到对照植株水平。互叶白千层是一种耐淹植物,可在河岸、库岸等间歇性淹水地区种植。
In order to optimize the use of suitable tree species for vegetation restoration in intermittent flooded areas such as banks and banks, the gas exchange, chlorophyll fluorescence and membrane permeability of Melaleuca alternifolia seedlings after 30 days of complete flooding were studied. Sexual recovery situation. The survival rate of Melaleuca alterniflora was 100% during 30 days of total flooding and 70 days after water returning. The chlorophyll content, net photosynthetic rate, stomatal conductance, transpiration rate, maximum photochemical quantum yield and photochemical quenching of PSⅡ decreased significantly after 30 days of flooding, but not photochemical quenching And plasma membrane permeability were significantly increased by 51%, 48%, 45%, 40%, 86%, 45%, 163% and 145% of control plants, respectively. Chlorophyll content, net photosynthetic rate, stomatal conductance, transpiration rate, maximum photochemical quantum efficiency of PSⅡ and photochemical quenching coefficient of Melaleuca alterniflora increased gradually during the process of regrowth after water returning, but not photochemical quenching And membrane permeability continued to decline, 60d after the return to the control plant level. Melaleuca alternifolia is a flood-tolerant plant that can be planted in intermittent flooded areas such as banks and banks.