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Rubber Trees Demonstrate a Clear Retranslocation Under Seasonal Drought and Cold Stresses 

 
论文编号:
作者: Li YW; Lan GY; Xia YJ
刊物名称: Frontiers in Plant Science
所属学科:
论文题目英文: Rubber Trees Demonstrate a Clear Retranslocation Under Seasonal Drought and Cold Stresses
年: Dec 2016
卷: 7
期:
页: 1907
联系作者: Li YW; Lan GY; Xia YJ
收录类别:
影响因子: 4.495
参与作者:
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摘要:

Having been introduced to the northern edge of Asian tropics, the rubber tree (Hevea brasiliensis) has become deciduous in this climate with seasonal drought and cold stresses. To determine its internal nutrient strategy during leaf senescence and deciduous periods, we investigated mature leaf and senescent leaf nutrients, water-soluble soil nutrients and characteristics of soil microbiota in nine different ages of monoculture rubber plantations. Rubber trees demonstrate complicated retranslocation of N, P, and K during foliar turnover. Approximately 50.26% of leaf nutrients and 21.47% of soil nutrients were redistributed to the rubber tree body during the leaf senescence and withering stages. However, no significant changes in the structure- or function-related properties of soil microbes were detected. These nutrient retranslocation strategy may be important stress responses. In the nutrient retranslocation process, soil plays a dual role as nutrient supplier and nutrient “bank.” Soil received the nutrients from abscised leaves, and also supplied nutrients to trees in the non-growth stage. Nutrient absorption and accumulation began before the leaves started to wither and fall.

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