Research Progress in Seed Development, Dormancy and Germination Regulated by Cytokinin
Received date: 2020-08-03
Accepted date: 2021-01-05
Online published: 2021-01-22
Seed germination is an important stage in the establishment, growth and propagation of plants, and plays a critical role in the life cycle of seed plants. Seed dormancy is formed during development, and reaches its peak at physiological maturity. The phytohormone regulation of seed dormancy and germination may be a highly conserved mechanism in seed plants. Cytokinin (CK) is one of the most important signal molecules in plants, and regulates many aspects of plant growth and development. The bioactive CK levels are controlled by a balance among biosynthesis, activation, deactivation, re-activation and degradation, and seed development, dormancy and germination are regulated by bioactive CK levels and signaling pathways. Here, we mainly summarize the research progresses of CK biosynthesis and catabolism, signaling, and regulation on seed development, dormancy and germination. In addition, we also propose some scientific questions that need further addressed in this field to provide some information for understanding the molecular mechanism of seed development, dormancy and germination regulated by CK.
Key words： cytokinin; metabolism; molecular mechanism; seed dormancy and germination; signaling
Songquan Song, Jun Liu, Hua Yang, Wenhu Zhang, Qi Zhang, Jiadong Gao . Research Progress in Seed Development, Dormancy and Germination Regulated by Cytokinin[J]. Chinese Bulletin of Botany, 2021 , 56(2) : 218 -231 . DOI: 10.11983/CBB20141
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