International Journal of Molecular Sciences

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Dr. Sang-kyu Lee

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Guest Editor

Division of Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
Interests: carbon metabolism; functinal genomics; targeted mutagenesis

Dr. Jong Seong Jeon

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Guest Editor

Graduate School of Green-Bio Science, Kyung Hee University, Yongin 17104, Republic of Korea
Interests: rice functional genomics; plant immunity; plant carbon metabolism; plant source-sink interaction; photosynthesis
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Special Issue Information

Dear Colleauges,

Modern agriculture is confronted with issues such as global population growth and climate change. According to numerous studies, major climate changes such as increased CO₂, rising temperatures, and drought, will have a negative impact on agriculture, particularly photosynthesis and crop productivity. Therefore, the ideal goal of future agriculture would be to increase photosynthesis efficiency in order to fix more carbon and efficiently transport and store the carbohydrates to sink organs (seeds, tubers, fruits, etc.). This Special Issue focuses on recent advances in functional studies on photosynthesis and carbon metabolism in plant species. We welcome the submission of original research articles and short communications that contribute to the advancement of photosynthesis and carbon metabolism. We are also inviting scientists to write reviews for this Special Issue.

Dr. Sang-kyu Lee
Dr. Jong Seong Jeon
Guest Editors

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Keywords

photosynthesis
carbon metabolism
carbon partioning
souce-sink relationship
sugar transporter
crop yield

Published Papers (1 paper)

Research

15 pages, 2967 KiB

Open AccessArticle

OsαCA1 Affects Photosynthesis, Yield Potential, and Water Use Efficiency in Rice

by Yaqian He, Wen Duan, Baoping Xue, Xiaochen Cong, Peng Sun, Xin Hou and Yun-Kuan Liang

Int. J. Mol. Sci. 2023, 24(6), 5560; https://doi.org/10.3390/ijms24065560 - 14 Mar 2023

Cited by 3 | Viewed by 1592

Abstract

Plant growth and crop yield are essentially determined by photosynthesis when considering carbon dioxide (CO₂) availability. CO₂ diffusion inside a leaf is one of the factors that dictate the CO₂ concentrations in chloroplasts. Carbonic anhydrases (CAs) are zinc-containing enzymes that interconvert CO₂ and bicarbonate ions (HCO₃⁻), which, consequently, affect CO₂ diffusion and thus play a fundamental role in all photosynthetic organisms. Recently, the great progress in the research in this field has immensely contributed to our understanding of the function of the β-type CAs; however, the analysis of α-type CAs in plants is still in its infancy. In this study, we identified and characterized the OsαCA1 gene in rice via the analysis of OsαCAs expression in flag leaves and the subcellular localization of its encoding protein. OsαCA1 encodes an α-type CA, whose protein is located in chloroplasts with a high abundance in photosynthetic tissues, including flag leaves, mature leaves, and panicles. OsαCA1 deficiency caused a significant reduction in assimilation rate, biomass accumulation, and grain yield. The growth and photosynthetic defects of the OsαCA1 mutant were attributable to the restricted CO₂ supply at the chloroplast carboxylation sites, which could be partially rescued by the application of an elevated concentration of CO₂ but not that of HCO₃⁻. Furthermore, we have provided evidence that OsαCA1 positively regulates water use efficiency (WUE) in rice. In summary, our results reveal that the function of OsαCA1 is integral to rice photosynthesis and yield potential, underscoring the importance of α-type CAs in determining plant physiology and crop yield and providing genetic resources and new ideas for breeding high-yielding rice varieties. Full article

(This article belongs to the Special Issue Regulation of Photosynthetic Carbon Assimilation and Allocation in Plant)

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