Physiological mechanisms influencing plant nitrogen isotope compositionReview

Evans RD.

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Physiological mechanisms influencing plant nitrogen isotope compositionReview

机译：影响植物氮同位素组成的生理机制综述

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Whole-plant and leaf nitrogen isotope composition are determined by the isotope ratio of the external nitrogen source and physiological mechanisms within the plant. Whole-plant isotope composition can reflect that of the nitrogen source when plant demand exceeds nitrogen supply, Uptake by mycorrhizae can cause the isotope ratio of the plant to deviate from the source. Intra-plant variation in isotope composition can be caused by multiple assimilation events, organ-specific loss of nitrogen, and resorption and reallocation of nitrogen. Future work must address acquisition of organic nitrogen from the soil solution, the role of mycorrhizae, and internal transformations within the plant.

机译：全株和叶片氮同位素组成由外部氮源的同位素比值和植物内部的生理机制决定。当植物需求超过氮供给时，全植物同位素组成可以反映氮源的同位素组成，菌根吸收会导致植物的同位素比值偏离源。植物内同位素组成的变化可由多次同化事件、器官特异性氮损失以及氮的吸收和重新分配引起。未来的工作必须解决从土壤溶液中获取有机氮、菌根的作用以及植物内部转化的问题。

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来源
《Trends in Plant Science》 |2001年第3期|121-126|共6页
作者
Evans RD.;
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作者单位

Evans RD, Univ Arkansas, Stable Isotope Lab, Fayetteville, AR 72701, USA;

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原文格式 PDF
正文语种英语
中图分类植物学;
关键词
Natural n-15 abundance; Organic nitrogen; Amino-acids; Fractionation; Nitrate; Delta-n-15; Ectomycorrhizal; Barley; Fungi; Absorption;

机译：天然 n-15 丰度;有机氮;氨基酸;分馏;硝酸盐;Delta-n-15;外生菌根;大麦;真菌;吸收;

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Physiological mechanisms influencing plant nitrogen isotope compositionReview

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