{"title":"C<sub>4</sub> monocots and C<sub>4</sub> dicots exhibit rapid photosynthetic induction response in contrast to C<sub>3</sub> plants.","authors":"Keiichiro Tanigawa, Qu Yuchen, Naoya Katsuhama, Kazuma Sakoda, Yu Wakabayashi, Yu Tanaka, Rowan Sage, Tracy Lawson, Wataru Yamori","doi":"10.1111/ppl.14431","DOIUrl":null,"url":null,"abstract":"<p><p>Considering the prevalence of ever-changing conditions in the natural world, investigation of photosynthetic responses in C<sub>4</sub> plants under fluctuating light is needed. Here, we studied the effect of dynamic illumination on photosynthesis in totally 10 C<sub>3</sub>, C<sub>3</sub>-C<sub>4</sub> intermediate, C<sub>4</sub>-like and C<sub>4</sub> dicots and monocots at CO<sub>2</sub> concentrations of 400 and 800 μmol mol<sup>-1</sup>. C<sub>4</sub> and C<sub>4</sub>-like plants had faster photosynthetic induction and light-induced stomatal dynamics than C<sub>3</sub> plants at 400 μmol mol<sup>-1</sup>, but not at 800 μmol mol<sup>-1</sup> CO<sub>2</sub>, at which the CO<sub>2</sub> supply rarely limits photosynthesis. C<sub>4</sub> and C<sub>4</sub>-like plants had a higher water use efficiency than C<sub>3</sub> plants at both CO<sub>2</sub> concentrations. There were positive correlations between photosynthetic induction and light-induced stomatal response, together with CO<sub>2</sub> compensation point, which was a parameter of the CO<sub>2</sub>-concentrating mechanism of C<sub>4</sub> photosynthesis. These results clearly show that C<sub>4</sub> photosynthesis in both monocots and dicots adapts to fluctuating light conditions more efficiently than C<sub>3</sub> photosynthesis. The rapid photosynthetic induction response in C<sub>4</sub> plants can be attributed to the rapid stomatal dynamics, the CO<sub>2</sub>-concentrating mechanism or both.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":null,"pages":null},"PeriodicalIF":5.4000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physiologia plantarum","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1111/ppl.14431","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Considering the prevalence of ever-changing conditions in the natural world, investigation of photosynthetic responses in C4 plants under fluctuating light is needed. Here, we studied the effect of dynamic illumination on photosynthesis in totally 10 C3, C3-C4 intermediate, C4-like and C4 dicots and monocots at CO2 concentrations of 400 and 800 μmol mol-1. C4 and C4-like plants had faster photosynthetic induction and light-induced stomatal dynamics than C3 plants at 400 μmol mol-1, but not at 800 μmol mol-1 CO2, at which the CO2 supply rarely limits photosynthesis. C4 and C4-like plants had a higher water use efficiency than C3 plants at both CO2 concentrations. There were positive correlations between photosynthetic induction and light-induced stomatal response, together with CO2 compensation point, which was a parameter of the CO2-concentrating mechanism of C4 photosynthesis. These results clearly show that C4 photosynthesis in both monocots and dicots adapts to fluctuating light conditions more efficiently than C3 photosynthesis. The rapid photosynthetic induction response in C4 plants can be attributed to the rapid stomatal dynamics, the CO2-concentrating mechanism or both.
期刊介绍:
Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.