Ecological significance and complexity of N-source preference in plants

被引:259
作者
Britto, Dev T. [1 ]
Kronzucker, Herbert J. [1 ]
机构
[1] Univ Toronto, Dept Biol Sci, Toronto, ON M1C 1A4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Ammonium; nitrate; N-source preference; succession; competition; soils; amino acids; complexity; CARBON-ISOTOPE DISCRIMINATION; NITRATE REDUCTASE-ACTIVITY; WATER-USE EFFICIENCY; SPRUCE PICEA-ABIES; NITROGEN ACQUISITION; AMMONIUM TOXICITY; BARLEY ROOTS; DIFFERENTIAL RESPONSES; PHRAGMITES-AUSTRALIS; GLUTAMINE-SYNTHETASE;
D O I
10.1093/aob/mct157
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Plants can utilize two major forms of inorganic N: NO3 (nitrate) and NH4 (ammonium). In some cases, the preference of one form over another (denoted as ) can appear to be quite pronounced for a plant species, and can be an important determinant and predictor of its distribution and interactions with other species. In many other cases, however, assignment of preference is not so straightforward and must take into account a wide array of complex physiological and environmental features, which interact in ways that are still not well understood. This Viewpoint presents a discussion of the key, and often co-occurring, factors that join to produce the complex phenotypic composite referred to by the deceptively simple term N-source preference. N-source preference is much more complex a biological phenomenon than is often assumed, and general models predicting how it will influence ecological processes will need to be much more sophisticated than those that have been so far developed.
引用
收藏
页码:957 / 963
页数:7
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