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A PHOT2-NPH3-CAMTA2 light-temperature coincidence detection system in Arabidopsis II

ABSTRACT: A PHOT2-NPH3-CAMTA2 light-temperature coincidence detection system in Arabidopsis II

PROVIDER: PRJNA1002314 | ENA |

REPOSITORIES: ENA

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A PHOT2-NPH3-CAMTA2 light-temperature coincidence detection system in Arabidopsis II

Project description:Light and temperature variations are inescapable in nature, providing many types of information and influencing development and physiology. PHOTOTROPIN (PHOT) blue light receptor-kinases play well-characterized roles in multiple processes in short time scales, but functions over days, weeks, or seasons have rarely been explored. Here we show that PHOT2 integrates blue light and low temperature signals to control leaf number at flowering. Plants lacking PHOT2 show delayed flowering, specifically when grown in low temperature. This effect is blocked by loss of NON-PHOTOTROPIC HYPOCOTYL 3 (NPH3), and can be phenocopied by reduced blue light intensity, and by removal of CAMTA2. PHOT2 and CAMTA2 show non-additive genetic interactions, and a deep RNA-sequencing time course reveals highly overlapping phot2- and camta2-dependent effects on gene expression patterns across the day. Network-based co-expression analysis indicates system-level up-regulation of key growth modules in phot2 and camta2 mutants. Temperature- and genotype-dependent modulation of florigen-anti-florigen balance in phot2 and camta2 mutants is consistent with the phenotype. Together these data establish PHOT2 and NPH3 as a light-temperature coincidence detection module, operating with CAMTA2 as a downstream or parallel regulator of PHOT2-dependent gene expression.

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Project description:This SuperSeries is composed of the SubSeries listed below.

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