不同生育期人参根系伤流液质量与叶片光合的关系
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国家自然科学基金(31171459)


Relationships Between Mass of Root Bleeding Sap and Photosynthesis in Leaves of Panax ginseng
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    摘要:

    为了解人参根系活力与叶片光合的关系,在人参茎基部剪断、收集伤流液,以伤流液的质量作为根系活力的指标,研究了不同生育期人参根系伤流液质量(m伤流液)与叶片净光合速率(Pn)和离体植株地上部分吸水量(AWM)的变化及其关系.结果表明:根系 m伤流液 在开花期较低,绿果期和红果初期较高,红果中期最低,叶片Pn表现为开花期较低,绿果期最高,红果初期较高,红果中期最低;根系 m伤流液 与叶片Pn和植株AWM均呈极显著正相关;叶片Pn和植株AWM与根系 m伤流液 的比值在红果中期最高,表明红果中期根系供水能力下降较快,而叶片Pn和植株需水量下降较慢.说明不同生育期人参根系活力与叶片光合有密切关系.

    Abstract:

    In order to investigate the relationship between root activity and photosynthetic ability at different growth stages of Panax ginseng,the stem of P.ginseng was cut at the base and the root bleeding sap was collected.The root bleeding sap mass(mBS), as an index indicating root activity,net photosynthetic rate (Pn) and the plant aerial organs absorbing water mass(AWM)of P.ginseng were measured at different growth stages.The results showed that mBS was lower at flowering stage,higher at green fruit and early red fruit stages and the lowest at red fruit stage.The photosynthesis of leaf was lower at flowering stage,higher at green fruit stage and early red fruit stage and the lowest at red fruit stage.BSW was positively correlated with Pn,PC and AWM.In addition,Pn/mBS and AWM/mBS was the highest at red fruit stage.The root activity was closely related to leaf photosynthesis of P.ginseng at different growth stages.

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李 鑫,崔菁菁,徐克章,肖金川,张治安,李大勇.不同生育期人参根系伤流液质量与叶片光合的关系[J].华南农业大学学报,2013,34(3):362-365

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  • 收稿日期:2012-08-21
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  • 在线发布日期: 2013-06-27