The A-B-A of Floral Transition: The to Do List for Perfect Escape
The transition to flowering marks the initiation of reproductive competence in plants.After the floral transition,the shoot apical meristem (SAM) ceases to produce leaf primordia and starts to generate floral primordia,the reproductive organs of plants.To maximize reproductive success,the timing of this transition needs to be precisely aligned with the most favorable environmental conditions (Blackman,2017).Day length and cold temperature variations usually act as predictable seasonal signals to initiate flowering.However,due to the complexity of natural conditions,plants must gage a much wider array of information before committing to reproductive development.A striking example of this developmental plasticity is the drought escape (DE) response,where drought conditions experienced during vegetative growth cause an accelerated flowering time compared with optimal watering conditions (Figure 1A).Among the strategies to cope with drought stress,DE may provide ephemeral plants like Arabidopsis with a simple ”exit strategy” to anticipate seed set before drought conditions become incompatible with their survival.
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Research in the author”s lab is supported by the Cariplo Foundation through the FLORIMAIZE project AF 1301-006/FC 2013-1889 jointly supported under the Ceres initiative of Fondazione Cariplo and Agropolis Fondation and the linea 2/2018 starting grant from the Università degli Studi di Milano.No conflict of interest declared
2019-05-27（万方平台首次上网日期，不代表论文的发表时间）
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