Two glyoxylate reductase isoforms are functionally redundant but required under high photorespiration conditions in rice

Zhang, Zhisheng; Liang, Xianwen; Lü, Lei; Xu, Zhongyu; Huang, Jiayu; He, Hailong; Peng, Xinxiang

doi:10.1186/s12870-020-02568-0

Cited by 8 publications

(6 citation statements)

References 51 publications

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“…Together, these findings are consistent with an elevated rate of SSA conversion to GHB with cold and low O 2 , and suggest that AtGLYR1,2 are part of an adaptive response to stress-induced changes in redox balance [ 83 ]. Notably, the rice osglyr1/2 double mutant displays stunted growth under photorespiratory conditions, compared to the WT [ 87 ], validating our earlier hypothesis that the GLYRs reduce both glyoxylate and SSA in planta [ 88 ]. The two GLYRs function in a redundant manner, which would be consistent with the diffusion of SSA and glyoxylate from their sites of origin.…”

Section: Gaba Metabolism and Its Response To Abiotic Stresssupporting

confidence: 77%

γ-Aminobutyrate (GABA) Regulated Plant Defense: Mechanisms and Opportunities

Shelp

Aghdam

Flaherty

2021

Plants

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Global climate change and associated adverse abiotic and biotic stress conditions affect plant growth and development, and agricultural sustainability in general. Abiotic and biotic stresses reduce respiration and associated energy generation in mitochondria, resulting in the elevated production of reactive oxygen species (ROS), which are employed to transmit cellular signaling information in response to the changing conditions. Excessive ROS accumulation can contribute to cell damage and death. Production of the non-protein amino acid γ-aminobutyrate (GABA) is also stimulated, resulting in partial restoration of respiratory processes and energy production. Accumulated GABA can bind directly to the aluminum-activated malate transporter and the guard cell outward rectifying K+ channel, thereby improving drought and hypoxia tolerance, respectively. Genetic manipulation of GABA metabolism and receptors, respectively, reveal positive relationships between GABA levels and abiotic/biotic stress tolerance, and between malate efflux from the root and heavy metal tolerance. The application of exogenous GABA is associated with lower ROS levels, enhanced membrane stability, changes in the levels of non-enzymatic and enzymatic antioxidants, and crosstalk among phytohormones. Exogenous GABA may be an effective and sustainable tolerance strategy against multiple stresses under field conditions.

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Section: Gaba Metabolism and Its Response To Abiotic Stresssupporting

confidence: 77%

γ-Aminobutyrate (GABA) Regulated Plant Defense: Mechanisms and Opportunities

Shelp

Aghdam

Flaherty

2021

Plants

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“…This reaction is essential during carbon recovery in photorespiration ( Fernie and Bauwe, 2020 ). Glyoxylate reductase converts glyoxylate to glycolate in the cytosol, oxidizing NADPH to NADP + , and probably participates in the removal of toxic glyoxylate leaked from peroxisomes ( Zhang et al, 2020a ). Interestingly, these two activities arise from the same enzyme, along with 2-KGR activity.…”

Section: Potential Roles Of Ta In Grape Berries Based On Predecessorsmentioning

confidence: 99%

Biosynthesis and Cellular Functions of Tartaric Acid in Grapevines

et al. 2021

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Tartaric acid (TA) is an obscure end point to the catabolism of ascorbic acid (Asc). Here, it is proposed as a “specialized primary metabolite”, originating from carbohydrate metabolism but with restricted distribution within the plant kingdom and lack of known function in primary metabolic pathways. Grapes fall into the list of high TA-accumulators, with biosynthesis occurring in both leaf and berry. Very little is known of the TA biosynthetic pathway enzymes in any plant species, although recently some progress has been made in this space. New technologies in grapevine research such as the development of global co-expression network analysis tools and genome-wide association studies, should enable more rapid progress. There is also a lack of information regarding roles for this organic acid in plant metabolism. Therefore this review aims to briefly summarize current knowledge about the key intermediates and enzymes of TA biosynthesis in grapes and the regulation of its precursor, ascorbate, followed by speculative discussion around the potential roles of TA based on current knowledge of Asc metabolism, TA biosynthetic enzymes and other aspects of fruit metabolism.

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“…Likewise, compared with Raza et al (2020) [ 126 ], the average interval distance of heat-tolerance meta-QTLs was smaller in this study. Besides, 47 blast-resistant and 21 heat-tolerant genes published were found in meta-QTL regions ( Table 1 and Table 2 ), such as Pi27 (t) [ 65 ], Pi-Da(t) [ 66 ], Pi14 [ 67 ], Pi16 (t) [ 68 ], Pid1 (t) [ 68 ], OsHsfA7 [ 104 ], OsHsfC1a [ 104 ], OsWRKY11 [ 105 ], OsGR2 [ 106 ], OsRb1 [ 107 ] and OsHSP58.7 [ 112 ]. Therefore, this study not only narrowed the confidence interval, but also improved the credibility of meta-QTLs related to these two traits, which would lay a foundation for further mining of crucial resistant genes.…”

Section: Discussionmentioning

confidence: 99%

Selection of Candidate Genes Conferring Blast Resistance and Heat Tolerance in Rice through Integration of Meta-QTLs and RNA-Seq

Tian

Chen

et al. 2022

Genes

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Due to global warming, high temperature is a significant environmental stress for rice production. Rice (Oryza sativa L.), one of the most crucial cereal crops, is also seriously devastated by Magnaporthe oryzae. Therefore, it is essential to breed new rice cultivars with blast and heat tolerance. Although progress had been made in QTL mapping and RNA-seq analysis in rice in response to blast and heat stresses, there are few reports on simultaneously mining blast-resistant and heat-tolerant genes. In this study, we separately conducted meta-analysis of 839 blast-resistant and 308 heat-tolerant QTLs in rice. Consequently, 7054 genes were identified in 67 blast-resistant meta-QTLs with an average interval of 1.00 Mb. Likewise, 6425 genes were obtained in 40 heat-tolerant meta-QTLs with an average interval of 1.49 Mb. Additionally, using differentially expressed genes (DEGs) in the previous research and GO enrichment analysis, 55 DEGs were co-located on the common regions of 16 blast-resistant and 14 heat-tolerant meta-QTLs. Among, OsChib3H-c, OsJAMyb, Pi-k, OsWAK1, OsMT2b, OsTPS3, OsHI-LOX, OsACLA-2 and OsGS2 were the significant candidate genes to be further investigated. These results could provide the gene resources for rice breeding with excellent resistance to these 2 stresses, and help to understand how plants response to the combination stresses of blast fungus and high temperature.

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Two glyoxylate reductase isoforms are functionally redundant but required under high photorespiration conditions in rice

Cited by 8 publications

References 51 publications

γ-Aminobutyrate (GABA) Regulated Plant Defense: Mechanisms and Opportunities

γ-Aminobutyrate (GABA) Regulated Plant Defense: Mechanisms and Opportunities

Biosynthesis and Cellular Functions of Tartaric Acid in Grapevines

Selection of Candidate Genes Conferring Blast Resistance and Heat Tolerance in Rice through Integration of Meta-QTLs and RNA-Seq

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