周凯, 郭维明, 王智芳, 郝峰鸽. 菊花不同部位及根际土壤水浸液处理对光合作用的自毒作用研究[J]. 中国生态农业学报(中英文), 2009, 17(2): 318-322. DOI: 10.3724/SP.J.1011.2009.00318
引用本文: 周凯, 郭维明, 王智芳, 郝峰鸽. 菊花不同部位及根际土壤水浸液处理对光合作用的自毒作用研究[J]. 中国生态农业学报(中英文), 2009, 17(2): 318-322. DOI: 10.3724/SP.J.1011.2009.00318
ZHOU Kai, GUO Wei-Ming, WANG Zhi-Fang, HAO Feng-Ge. Autotoxicity of aquatic extracts from chrysanthemum and rhizosphere soil on photosynthesis in the same plant species[J]. Chinese Journal of Eco-Agriculture, 2009, 17(2): 318-322. DOI: 10.3724/SP.J.1011.2009.00318
Citation: ZHOU Kai, GUO Wei-Ming, WANG Zhi-Fang, HAO Feng-Ge. Autotoxicity of aquatic extracts from chrysanthemum and rhizosphere soil on photosynthesis in the same plant species[J]. Chinese Journal of Eco-Agriculture, 2009, 17(2): 318-322. DOI: 10.3724/SP.J.1011.2009.00318

菊花不同部位及根际土壤水浸液处理对光合作用的自毒作用研究

Autotoxicity of aquatic extracts from chrysanthemum and rhizosphere soil on photosynthesis in the same plant species

  • 摘要: 菊花Dendranthema morifolium(Ramat) Tzvel.的自毒作用是菊花连作障碍发生机理研究的重要内容之一。本文研究了连作障碍比较明显的菊花栽培种“高压太子”不同部位(枯落物、叶、茎和根系)及根际土壤水浸液处理对盆栽同种菊花光合作用的影响, 结果表明: 不同部位和根际土壤水浸液处理对叶片叶绿素含量、净光合速率及气孔导度均表现出抑制趋势, 而暗呼吸速率却受到促进, 尤以地上部水浸液的抑制作用为显著。说明降低自身叶绿素含量、净光合速率及气孔导度, 即抑制自身的光合作用, 同时促进自身暗呼吸是菊花自毒作用的机制之一。

     

    Abstract: Autotoxicity is a major obstacle in continuous cropping under protected cultivation. Previous studies have shown that autotoxicity is a critical factor in chrysanthemum cultivation under continuous cropping. In this paper, autotoxic effects of aquatic extracts from different parts (litters, leaves, stems, roots) and rhizosphere soil of cultivated chrysanthemum “Gaoyataizi” on the photosynthesis of the same species of crop were investigated. The results show that aquatic extracts, especially the extracts of aboveground parts, significantly decrease chlorophyll content, net photosynthetic rate and leaf photosynthetic activity and stomatal conductance. It however, enhances dark respiration rate. The study shows that inhibiting photosynthesis and enhancing dark respiration is one of the mechanisms of autotoxicity in chrysanthemum.

     

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