Chloroplast Accumulation Response Enhances Leaf Photosynthesis and Plant Biomass Production
Year: 2018
Type: article
Abstract: Under high light intensity, chloroplasts avoid absorbing excess light by moving to anticlinal cell walls (avoidance response), but under low light intensity, chloroplasts accumulate along periclinal cell walls (accumulation response). In most plant species, these responses are induced by blue light and are mediated by the blue light photoreceptor, phototropin, which also regulates phototropism, leaf flattening, and stomatal opening. These phototropin-mediated responses could enhance photosynthesis and biomass production. Here, using various Arabidopsis (Arabidopsis thaliana) mutants deficient in chloroplast movement, we demonstrated that the accumulation response enhances leaf photosynthesis and plant biomass production. Conspicuously, phototropin2 mutant plants specifically defective in the avoidance response but not in other phototropin-mediated responses displayed a constitutive accumulation response irrespective of light intensities, enhanced leaf photosynthesis, and increased plant biomass production. Therefore, our findings provide clear experimental evidence of the importance of the chloroplast accumulation response in leaf photosynthesis and biomass production.
Source: PLANT PHYSIOLOGY
DOI: 10.1104/pp.18.00484
Language: English
Topic: Light effects on plants
Subfield: Plant Science
Domain: Life Sciences
Open Access status: green
Awards: G1916572528, G2249407812, G2669701665, G3262059990, G3952382433, G4404770026, 葉緑体光定位運動における新規因子の同定と信号伝達分子メカニズムの解明, How plants adjust their photosynthesis in response to fluctuating light environments, chloroplast movement on adapting light environment, G5785719264, Functioinal analysis of the factors involved in transportation rice glutelin from ER in rice endosperm and utilization of breeding, Enhancement of plant biomass production in conifer trees by altering choloroplast movemment, Functional Analysis of Newly-found Actin Structure Involved inChloroplast Photorelocation Movement, Analysis of the signaling pathway of a phototropin photoreceptor in microdomain-like particles(Fostering Joint International Research), G750020003, Studies on the signal tranferred in a cell and its transferring system, Analysis of signaling of a phototropin photoreceptor in microdomains, Study on the mechanism of motive force generation in chloroplast movement
OpenAlex ID: W2894376951