Phylloxera infestation and the uptake and distribution of C-13 and N-15 tracers in grape vines

文献类型： 外文期刊

第一作者： Duo, Yuanpeng

作者： Duo, Yuanpeng;Wang, Fengpan;Ji, Xinglong;Zhai, Heng;Jiang, Enshun

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期刊名称：VITIS （ 影响因子：1.339； 五年影响因子：1.306 ）

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收录情况： SCI

摘要： In order to study the reason phylloxera (Daktulosphaira vitifolia Fitch) feeding on roots leads to decreased plant productivity, the uptake and distribution of C-13 photosynthates and N-15 in the grape vine 'Wuhe 8612' in response to phylloxera infestation were investigated. Phylloxera and grapevines cocultivated in pots were treated with (CO2)-C-13 and N-15-urea. The plant weight, nitrogen concentration and accumulation, N-15 utilization efficiency, Nitrogen derived from fertilizer (Ndff%), and carbon isotope ratio (delta C-13) of different organs were measured. Phylloxera infestation significantly reduced grape weight, shoot length, and N concentration and accumulation in different organs, whereas it increased the ratio between N content of the of roots and above-ground organs. Phylloxera infestation reduced leaf and root nitrogen N-15 utilization efficiency, by 24 % and 14 %, respectively compared to controls. Labeled leaves of infested plants took up rather more C-13 and N-15 and exported a substantial amount of these nutrients to roots. Labeled roots took up rather more N-15 and exported a small amount of these nutrients to upper leaves. This study found that phylloxera infestation reduced C-13 and N-15 uptake in leaves and roots, but increased N and photosynthates, which were mostly distributed to the roots, but also to the upper leaves. These factors together led to weak grape vine growth.

分类号： S663.1

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