Phototropin monitors actual temperature, not temperature difference, to regulate temperature-dependent chloroplast movement via cis-trans autophosphorylation mode switching in Marchantia polymorpha.

ABSTRACT:

Main conclusion

In liverworts, phototropin senses the actual temperature rather than temperature differences and switches from cis- to trans-autophosphorylation to trigger the cold-avoidance response of chloroplast movement. Blue-light (BL)-induced chloroplast movement in plant cells is temperature-dependent. At standard growth temperatures, chloroplasts move toward weak BL-irradiated regions (accumulation response), maximizing photoreception, whereas at lower temperatures they move away from the irradiated area (cold-avoidance response), reducing photodamage. This temperature-dependent switch in the chloroplast response is mediated by phototropin (phot), a BL receptor and thermosensor, which contains a kinase domain and undergoes cis- and trans-autophosphorylation in response to B

SUBMITTER: Noguchi M 

PROVIDER: S-EPMC12812097 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature