Journal
PLANTS-BASEL
Volume 11, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/plants11091233
Keywords
rice; at1g65230 mutant line; light-harvesting complex; photosynthetic pigment; salt stress; phiPSII; electron transport rate; stomatal conductance
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Funding
- 90th Anniversary of Chulalongkorn University, Rachadapisek Sompote Fund [GCUGR1125614034D]
- Network Strengthening Fund [B16F640103]
- project Plants as a tool for sustainable global development within the program Research, Development and Education (OP RDE) [CZ.02.1.01/0.0/0.0/16_019/0000827]
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This study investigated the functions of eight genes involved in photosynthesis under salt stress conditions using gene co-expression network analysis. The results showed that the expression of the LOC 0s01g68450 gene improved photosynthesis and salt tolerance in plants.
Salt stress affects plant growth and productivity. In this study we determined the roles of eight genes involved in photosynthesis, using gene co-expression network analysis, under salt-stress conditions using Arabidopsis knockout mutants. The green area of the leaves was minimum in the at1g65230 mutant line. Rice LOC 0s01g68450, a homolog of at1g65230, was ectopically expressed in the at1g65230 mutant line to generate revertant lines. Under salt stress, the revertant lines exhibited significantly higher net photosynthesis rates than the at1g65230 mutant line. Moreover, the operating efficiency of photosystem II (PSII) and electron transport rate of the revertant lines were higher than those of the wild type and at1g65230 mutant line after 10 days of exposure to salt stress. After this period, the protein PsbD-the component of PSII-decreased in all lines tested without significant difference among them. However, the chlorophyll a and b, carotenoid, and anthocyanin contents of revertant lines were higher than those of the mutant line. Furthermore, lower maximum chlorophyll fluorescence was detected in the revertant lines. This suggests that LOC 0s01g68450 expression contributed to the salt tolerance phenotype by modifying the energy dissipation process and led to the ability to maintain photosynthesis under salt stress conditions.
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