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Role of SVP in the control of flowering time by ambient temperature in Arabidopsis

2007; Cold Spring Harbor Laboratory Press; Volume: 21; Issue: 4 Linguagem: Inglês

10.1101/gad.1518407

1549-5477

Jeong Hwan Lee, Seong Jeon Yoo, Soo Hyun Park, Ildoo Hwang, Jong Seob Lee, Ji Hoon Ahn,

Plant Reproductive Biology

Plants must perceive and rapidly respond to changes in ambient temperature for their successful reproduction. Here we demonstrate that Arabidopsis SHORT VEGETATIVE PHASE ( SVP ) plays an important role in the response of plants to ambient temperature changes. The loss of SVP function elicited insensitivity to ambient temperature changes. SVP mediates the temperature-dependent functions of FCA and FVE within the thermosensory pathway. SVP controls flowering time by negatively regulating the expression of a floral integrator, FLOWERING LOCUS T ( FT ), via direct binding to the CArG motifs in the FT sequence. We propose that this is one of the molecular mechanisms that modulate flowering time under fluctuating temperature conditions.