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Plant δ 15 N associated with arbuscular mycorrhization, drought and nitrogen deficiency
Author(s) -
Handley L. L.,
Azcón R.,
Ruiz Lozano J. M.,
Scrimgeour C. M.
Publication year - 1999
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19990715)13:13<1320::aid-rcm607>3.0.co;2-m
Subject(s) - arbuscular mycorrhiza , mycorrhiza , chemistry , nitrogen , nutrient , δ15n , arbuscular mycorrhizal , symbiosis , botany , agronomy , δ13c , biology , stable isotope ratio , bacteria , genetics , physics , organic chemistry , quantum mechanics
It has long been evident that plant 15 N chiefly reflects the processes which fractionate 15 N/ 14 N rather than the 15 N of plant N source(s). It has emerged recently that one of the most important fractionating processes contributing to the whole plant 15 N is the presence/absence, type or species of mycorrhiza, especially when interacting with nutrient deficiency. Ecto‐ and ericoid mycorrhizas are frequently associated with 15 N‐depleted foliar 15 N, commonly as low as −12‰. As shown by the present study, plants having no mycorrhiza, or those infected with various species of arbuscular mycorrhiza (AM)‐forming fungi, interact with varying concentrations of soil nitrogen [N] and moisture to enrich plant 15 N by as much as 3.5‰. Hence the lack of a mycorrhiza, or variation in the species of AM‐forming fungal associations, can account for about 25% of the usually reported variations of foliar 15 N found in field situations and do so by 15 N enrichment rather than depletion. Copyright © 1999 John Wiley & Sons, Ltd.