香草醛和对羟基苯甲酸对杉木幼苗生理特性的影响 |
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| 出 版 社：应用生态学报 |
| 发表时间：2002年10月 |
| 台 站：
会同森林生态系统定位研究站
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| 作 者：陈龙池 廖利平 汪思龙 黄志群 肖复明 |
| 点 击 率：9820 |
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| 关 键 字：酚类物质 化感作用 净光合速率 蒸腾速率 气孔导度 根系活力 |
| 摘 要：采用盆栽模拟实验, 研究了不同浓度的香草醛和对羟基苯甲酸对杉木幼苗生理特性的影响. 结果表明, 当浓度为10 mmol·L - 1和1 mmol·L - 1时显著抑制了杉木幼苗的叶绿素含量、光合作用、根系活力等生理指标, 并且随着浓度的增加, 对生理活性的抑制作用增大. 其中, 用香草醛处理的杉木幼苗的净光合速率分别降低37. 0 %、25. 1 %; 蒸腾速率分别降低37. 0 %、20. 3 %; 气孔导度分别降低46. 8 %、33. 7 %; 根系活力分别降低78. 8 %、51. 6 %. 连栽杉木林土壤中积累的香草醛、对羟基苯甲酸等酚类化合物能够对杉木幼苗产生化感作用, 这是导致连栽杉木生产力降低的一个不可忽视的因素. |
| 关 键 字(英文)：Phenolics, Allelopathy, Net photosynthetic rate, Transpirational rate, Stomatal conductance, Activity of root system |
| 摘 要(英文)：Effects of vanillin and P2hydroxybenzoic acid at different concentrations on physiological characteristic of Chinese fir seedlings were studied by potted experiment . The results showed that 10mmol·L - 1 and 1 mmol·L - 1 of two kinds of phenolics significantly reduced the content of chlorophyll ,rate of photosynthesis and root activity , and that the higher the concentration of vanillin and P2hydroxybenzoic acid ,the more the physiological activities was inhibited.By treatment with 1 and 10mmol·L - 1 vanillin , Chinese fir seedlings reduced its photosynthesis rate 25.1 % and 37.0 % ,transpiration rate 20.3 % and 37.0 % ,stomata conductance 33. 7 % and 46. 8 % and root activity 51. 6 % and 78. 8 % ,respectively. The results suggested that vanillin and P2hydroxybenzoic acid accumulated in the soil by continuous cropping of Chinese fir may have some allelopathic effect on the seedlings of Chinese fir and the effect is one of the factors leading to the low productivity of continuously cropped Chinese fir forest. |
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 香草醛和对羟基苯甲酸对杉木幼苗生理特性的影响.pdf |
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