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首页> 外文期刊>RSC Advances >The tolerance of growth and clonal propagation of Phragmites australis (common reeds) subjected to lead contamination under elevated CO2 conditions
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The tolerance of growth and clonal propagation of Phragmites australis (common reeds) subjected to lead contamination under elevated CO2 conditions

机译：在升高的CO2条件下遭受铅污染的南方芦苇（普通芦苇）的生长和克隆繁殖的耐受性

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摘要

Phragmites australis is a rhizomatous perennial plant with extensive distribution and tolerance. To explore plant growth and clonal propagative tolerance to lead contamination under elevated CO2, they were exposed to combinations of five Pb levels (0, 300, 500, 1500, 3000 mg kg(-1)) and two CO2 concentrations (380 +/- 20 and 760 +/- 20 mmol mol(-1)) in phytotron. Biomass, photosynthetic parameters and rhizome growth were significantly inhibited, while number of axillary shoot buds and daughter apical rhizome shoots were increased by Pb additions. similar to 80% of daughter shoots was from daughter axillary shoots, representing a phalanx growth pattern. Under elevated CO2, photosynthetic parameters (excluding stomatal conductance and transpiration rate), growth of clonal modules were increased, facilitating plant biomass accumulation, phalanx growth and spreading strategy. The results suggest that elevated CO2 might improve growth and clonal propagative resistance to Pb contamination through increasing photosynthetic, phalanx growth and population expansion of Phrgagmites australis.
机译：芦苇是多年生的根茎植物，具有广泛的分布和耐受性。为了探索植物生长和克隆繁殖对铅在CO2浓度升高下的污染的耐受性，将它们暴露于五种Pb水平（0、300、500、1500、3000 mg kg（-1））和两种CO2浓度（380 +/-）的组合下20和760 +/- 20 mmol mol（-1））。添加Pb可以显着抑制生物量，光合参数和根茎的生长，而腋芽和子根茎的芽数则增加。类似于80％的子枝来自子腋芽，代表方节生长模式。在CO2浓度升高的条件下，光合作用参数（气孔导度和蒸腾速率除外），克隆模块的生长增加，有利于植物生物量的积累，趾骨的生长和扩散策略。结果表明，升高的CO2可能会通过增加光生的Phrgagmites australis的光合作用，趾骨生长和种群扩展来改善其生长和对Pb污染的克隆繁殖抗性。

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