A metabolic day length measurement system mediates winter photoperiodism in plants
| Autor: | Wenxin Yuan, Morgan Vanderwall, Ann Feke, Bryan Thines, Ariela Schear, Wei Liu, Daniel A. Tarté, Joshua M. Gendron, Chun Chung Leung, Xing Wu, Damon A. Clark, Garrett Sager |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
endocrine system
Photoperiod Circadian clock Arabidopsis Metabolic network Flowers Biology Photosynthesis General Biochemistry Genetics and Molecular Biology Article Gene Expression Regulation Plant Circadian Clocks Botany Molecular Biology Gene reproductive and urinary physiology photoperiodism Arabidopsis Proteins food and beverages Cell Biology biology.organism_classification Circadian Rhythm biological sciences Seasons hormones hormone substitutes and hormone antagonists Developmental Biology |
| Zdroj: | Dev Cell |
| Popis: | Plants have served as a preeminent study system for photoperiodism due to their propensity to flower in concordance with the seasons. A nearly singular focus on understanding photoperiodic flowering has prevented the discovery of other photoperiod measuring systems necessary for vegetative health. Here, we use bioinformatics to identify photoperiod-induced genes in Arabidopsis. We show that one, PP2-A13, is expressed exclusively in, and required for, plant fitness in short, winter-like photoperiods. We create a real-time photoperiod reporter, using the PP2-A13 promoter driving luciferase, and show that photoperiodic regulation is independent of the canonical CO/FT mechanism for photoperiodic flowering. We then reveal that photosynthesis combines with circadian-clock-controlled starch production to regulate cellular sucrose levels to control photoperiodic expression of PP2-A13. This work demonstrates the existence of a photoperiod measuring system housed in the metabolic network of plants that functions to control seasonal cellular health. |
| Databáze: | OpenAIRE |
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