期刊
JOURNAL OF PLANT PHYSIOLOGY
卷 159, 期 6, 页码 567-584出版社
ELSEVIER GMBH
DOI: 10.1078/0176-1617-0774
关键词
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Ammonium (NH4+) toxicity is an issue of global ecological and economic importance. In this review, we discuss the major themes of NH4+ toxicity, including the occurrence of NH4+ in the biosphere, response differences to NH4+ nutrition among wild and domesticated species, symptoms and proposed mechanisms underlying toxicity, and means by which it can be alleviated. Where possible, nitrate (NO3-) nutrition is used as point of comparison. Particular emphasis is placed on issues of cellular pH, ionic balance, relationships with carbon biochemistry, and bioenergetics of primary NH4+ transport. Throughout, we attempt to identify areas that are controversial, and areas that are in need of further examination.
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