Discoveries and dilemmas concerning cytokinin metabolism

被引:15
作者
Auer, CA [1 ]
机构
[1] Univ Connecticut, Dept Plant Sci, Storrs, CT 06269 USA
关键词
cytokinin; metabolism; conjugation; interconversion pathway; O-glucosyltransferase;
D O I
10.1007/s003440010044
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Natural cytokinin Compounds that function as plant hormones arc adenine molecules connected to an N-6 side chain. Metabolic pathways produce various structural modifications to the adenine moiety and/or the side chain that affect cytokinin function, activity, stability, and transport in plants. This review focuses on recent research that is elucidating the genes and biochemical pathways involved in cytokinin conjugation, deconjugation, and inter-conversion. One area of new discovery concerns the process of O-glucosidc conjugate formation. Genes have been identified for O-glucosyltransferase enzymes in Phaseolus (ZOG1 and ZOX1) and maize (cisZOG1) and have been used to study enzyme activity, structure, and function in plant development. New information about the genetic basis of the adenine salvage pathway and its relationship to cytokinin interconversion and regulation has also become available. However, various dilemmas about cytokinin metabolism remain and need to be resolved using a combination of research approaches.
引用
收藏
页码:24 / 31
页数:8
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