The role of miR156 in developmental transitions in Nicotiana tabacum

Plants undergo a series of developmental transitions during their life cycle. After seed germination, plants pass through two distinct phases： the vegetative phase in which leaves are produced and the reproductive phase in which flowering occurs. Based on the reproductive competence and morphologica...

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Bibliographic Details
Published in:Science China. Life sciences 2015-03, Vol.58 (3), p.253-260
Main Authors: Zhang, TianQi, Wang, JiaWei, Zhou, ChuanMiao
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Life Sciences
MicroRNAs - genetics
MicroRNAs - physiology
Nicotiana - genetics
Nicotiana - growth & development
Plant Leaves - growth & development
Research Paper
中转
植物发育
烟草
生命周期
生殖能力
生殖阶段
种子发芽
过量表达
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Summary:Plants undergo a series of developmental transitions during their life cycle. After seed germination, plants pass through two distinct phases： the vegetative phase in which leaves are produced and the reproductive phase in which flowering occurs. Based on the reproductive competence and morphological changes, the vegetative phase can be further divided into juvenile and adult phases. Here, we demonstrate that the difference between juvenile and adult phase of Nicotiana tabacum is characterized by the changes in leaf size, leaf shape as well as the number of leaf epidermal hairs（trichomes）. We further show that miR156, an age-regulated microR NA, regulates juvenile-to-adult phase transition in N. tabacum. Overexpression of miR156 results in delayed juvenile-to-adult transition and flowering. Together, our results support an evolutionarily conserved role of miR156 in plant developmental transitions.
ISSN:1674-7305
1869-1889
DOI:10.1007/s11427-015-4808-5