期刊
PLANT SIGNALING & BEHAVIOR
卷 7, 期 9, 页码 1185-1187出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.21260
关键词
Ultraviolet-B; morphogenesis; UVR8; Stress; flavonoids; endoreduplication
资金
- Research Foundation Flanders (FWO) [G.0382.04N]
- FWO Research Community [W0.038.04N]
- Science Foundation Ireland (SFI) [11/RFP.1/EOB/3303]
- COST-Action [FA0906]
Low levels of UV (UV)-radiation alter the morphology of plants. UV-B exposure can lead to shorter petioles and shorter, narrower and/or thicker leaf blades. The resulting decrease in leaf area has been associated with inhibitory UV-B effects on biomass accumulation. In Arabidopsis, UV-B effects on leaf area have variously been attributed to altered cell division, cell expansion or combinations of these two processes. A dedicated UV-B sensory system, crosstalk between flavonoids and auxins, endoreduplication and generic Stress Induced Morphogenic Responses (SIMR) have all been proposed to contribute to the UV-B phenotype. Here, we propose that UV-mediated morphogenesis, rather than being controlled by a single regulatory pathway, is controlled by a regulatory blur involving multiple compensatory molecular and physiological feedback interactions.
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