Chinese Bulletin of Botany ›› 2009, Vol. 44 ›› Issue (03): 273-282.DOI: 10.3969/j.issn.1674-3466.2009.03.003
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Fengqiu Cao, Guowei Liu, Weihong Wang, Xuemin Wu, Laihua Liu*
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Urea occurs in nature and serves as a rapidly available nitrogen (N) source for the growth of many organisms, including pl-ants. This review gives a brief overview of the fundamental physiological significance of urea occurrence and its permeable proteins in various living systems. Mechanisms for urea generation and degradation in plants are discussed, and physiolo-gical roles of urea in plant N nutrition, metabolism and transport are highlighted. Two types of plant membrane transporters, namely MIPs and DUR3, potentially play roles in low- and high-affinity urea transport, respectively. MIPs mediate passive urea movement and were primarily investigated in heterologous gene-expression systems; AtDUR3 was shown to particip-ate in urea uptake in Arabidopsis roots. Transport characteristics, transcriptional regulation, and the subcellular localization of MIPs and DUR3 suggest the relevance of urea transport through these transporters in N nutrition and redistribution in planta.
Fengqiu Cao;Guowei Liu;Weihong Wang;Xuemin Wu;Laihua Liu*. Molecular Processes of Urea Metabolism and Transport in Higher Plants[J]. Chinese Bulletin of Botany, 2009, 44(03): 273-282.
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URL: https://www.chinbullbotany.com/EN/10.3969/j.issn.1674-3466.2009.03.003
https://www.chinbullbotany.com/EN/Y2009/V44/I03/273