Maize bHLH55 functions positively in salt tolerance through modulation of AsA biosynthesis by directly regulating GDP-mannose pathway genes

Yu, Chunmei; Yan, Ming; Dong, Huizhen; Luo, Jie; Ke, Yongchao; Guo, Anfang; Chen, Yanhong; Zhang, Jian; Huang, Xiaosan

doi:10.1016/j.plantsci.2020.110676

Cited by 38 publications

(21 citation statements)

References 64 publications

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“…that is induced by salinity [ 57 ], while in cultivated rice, the expression of OsAKT1 (inward-rectifying K + channel) is induced and the ionic balance is maintained by the expression of OrbHLH001 under salt stress [ 58 ]. Additionally, in maize, ZmbHLH55 improves salt stress tolerance by increasing the accumulation of ascorbic acid through the direct modulation of the expression of genes involved in ascorbic acid biosynthesis [ 59 ]. These results provide insights into the mechanisms by which members of the bHLH gene family respond to salt stress in plants ( Figure 2 ).…”

Section: Roles Of Bhlh Tfs In Plant Stress Tolerancementioning

confidence: 99%

Current Understanding of bHLH Transcription Factors in Plant Abiotic Stress Tolerance

Guo

Sun

et al. 2021

IJMS

136

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Named for the characteristic basic helix-loop-helix (bHLH) region in their protein structure, bHLH proteins are a widespread transcription factor class in eukaryotes. bHLHs transcriptionally regulate their target genes by binding to specific positions on their promoters and thereby direct a variety of plant developmental and metabolic processes, such as photomorphogenesis, flowering induction, shade avoidance, and secondary metabolite biosynthesis, which are important for promoting plant tolerance or adaptation to adverse environments. In this review, we discuss the vital roles of bHLHs in plant responses to abiotic stresses, such as drought, salinity, cold, and iron deficiency. We suggest directions for future studies into the roles of bHLH genes in plant and discuss their potential applications in crop breeding.

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Section: Roles Of Bhlh Tfs In Plant Stress Tolerancementioning

confidence: 99%

Current Understanding of bHLH Transcription Factors in Plant Abiotic Stress Tolerance

Guo

Sun

et al. 2021

IJMS

136

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“…In addition, the significant SNP chr8.S_162559636 found for SePCPP under low-P condition was located in the gene GRMZM2G030762 (Figure S8), which encodes the transcription factor bHLH55, a member of BHLH family. In maize, transcription factor bHLH55 can enhance plant salt stress through regulation of the biosynthesis of ascorbic acid, which is an antioxidant and enzyme vital to abiotic stress tolerance [48].…”

Section: Genome-wide Association Study To Identify P-stress Responsive Genesmentioning

confidence: 99%

Genetic Dissection of Phosphorus Use Efficiency in a Maize Association Population under Two P Levels in the Field

Wang

et al. 2021

IJMS

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Phosphorus (P) deficiency is an important challenge the world faces while having to increase crop yields. It is therefore necessary to select maize (Zea may L.) genotypes with high phosphorus use efficiency (PUE). Here, we extensively analyzed the biomass, grain yield, and PUE-related traits of 359 maize inbred lines grown under both low-P and normal-P conditions. A significant decrease in grain yield per plant and biomass, an increase in PUE under low-P condition, as well as significant correlations between the two treatments were observed. In a genome-wide association study, 49, 53, and 48 candidate genes were identified for eleven traits under low-P, normal-P conditions, and in low-P tolerance index (phenotype under low-P divided by phenotype under normal-P condition) datasets, respectively. Several gene ontology pathways were enriched for the genes identified under low-P condition. In addition, seven key genes related to phosphate transporter or stress response were molecularly characterized. Further analyses uncovered the favorable haplotype for several core genes, which is less prevalent in modern lines but often enriched in a specific subpopulation. Collectively, our research provides progress in the genetic dissection and molecular characterization of PUE in maize.

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“…), enhanced rice salt tolerance by regulating the expression level of OsAKT1 (Li et al 2010). ZmbHLH55 in maize and SlbHLH22 in tomato improved plant salt tolerance by over-expression (Waseem et al 2019;Yu et al 2021). From Fig.…”

Section: Discussionmentioning

confidence: 90%

BEAR1, a bHLH Transcription Factor, Controls Salt Response Genes to Regulate Rice Salt Response

Teng

Zhang

et al. 2022

J. Plant Biol.

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Transcription factors play important roles in plant abiotic stresses. However, there are a large number of TF functions in rice salt response need to be characterized. Our study identified a new transcription factor, BEAR1, acts as a regulator of rice salt response. We used artificial microRNA to generate BEAR1 knockdown transgenic rice, and CRISPR to generate BEAR1 gene editing mutant lines. Both knockdown lines and mutant lines showed salt sensitive phenotypes, compared to NIP. Transient expression in rice protoplast was used to confirm the subcellular localization of BEAR1. The transcription activity of BEAR1 was detected by yeast system. BEAR1 was induced by salt stress and dominantly expressed in root at seedling stage and spikelet at mature stage. BEAR1 regulating rice salt response by controlling expression levels of many salt-related genes, including salt response marker genes and ion transporter genes. The study revealed that BEAR1 was a regulator of rice salt response.

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Maize bHLH55 functions positively in salt tolerance through modulation of AsA biosynthesis by directly regulating GDP-mannose pathway genes

Cited by 38 publications

References 64 publications

Current Understanding of bHLH Transcription Factors in Plant Abiotic Stress Tolerance

Current Understanding of bHLH Transcription Factors in Plant Abiotic Stress Tolerance

Genetic Dissection of Phosphorus Use Efficiency in a Maize Association Population under Two P Levels in the Field

BEAR1, a bHLH Transcription Factor, Controls Salt Response Genes to Regulate Rice Salt Response

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