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E-GEOD-63429

ABSTRACT: Transcription profiling of submergence tolerance in Maize

PROVIDER: E-GEOD-63429 | ExpressionAtlas | 2019-05-14

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-63429-analysis-methods.tsv	Tabular
	E-GEOD-63429-analytics.tsv	Tabular
	E-GEOD-63429-analytics.tsv.undecorated	Tabular
	E-GEOD-63429-analytics.tsv.undecorated.unrounded	Tabular
	E-GEOD-63429-analytics.tsv.unrounded	Tabular

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Genetic and Molecular Characterization of Submergence Response Identifies Subtol6 as a Major Submergence Tolerance Locus in Maize

Project description:Maize is highly sensitive to short term flooding and submergence. We aimed to discover genetic variation for submergence tolerance in maize and elucidate the genetic basis of submergence tolerance through transcriptional profiling of contrasting genotypes. A diverse set of maize nested association mapping (NAM) founder lines were screened, and two highly tolerant (Mo18W and M162W) and sensitive (B97 and B73) genotypes were identified. Transcriptome analysis was performed on these inbreds to provide genome level insights into the molecular responses to submergence.

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Genetic and Molecular Characterization of Submergence Response Identifies Subtol6 as a Major Submergence Tolerance Locus in Maize

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Project description:In this work, we performed high throughput sequencing of small RNA libraries in maize (Zea mays ssp. mays) and teosinte (Zea mays ssp. parviglumis) to investigate the response mediated by miRNAs in these plants under control conditions, submergence, drought and alternated drought-submergence or submergence-drought stress. After Illumina sequencing of 8 small RNA libraries, we obtained from 16,139,354 to 46,522,229 raw reads across the libraries. Bioinformatic analysis identified 88 maize miRNAs and 76 miRNAs from other plants differentially expressed in maize and/or in teosinte in response to at least one of the treatments, and revealed that a larger set of miRNAs were regulated in maize than in teosinte in response to submergence and drought stress.

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BKK1/BAK7 and TCP21 form a positive feedback loop to facilitate submergence tolerance in plants

Project description:Submergence can be a deleterious threat to plant development and the agricultural production of Brassica napus (B. napus), an important worldwide oil crop. However, the molecular mechanisms underlying submergence tolerance in B. napus remain elusive. Here, through a genome-wide association study, we identify a SOMATIC EMBRYOGENESIS RECEPTOR-LIKE KINASE, BKK1/BAK7, which is indispensable for plant survival after submergence stress. Submergence rapidly activates the expression of BAK7 and induces the accumulation of the kinase part of BAK7 in the nucleus. BAK7 interacts with and phosphorylates class I TCP transcription factor TCP21, stabilizing it. TCP21, along with several other class I TCPs, modulates the transcriptomic reprogramming after submergence to enhance plant tolerance to submergence. Moreover, overexpression of TCP21 rescues the submergence-intolerant phenotype of bak1-3 bkk1-1 mutant. Interestingly, TCP21 directly binds to the promoter regions of BAK7 to activate its expression after submergence. This study provides insights into the molecular mechanism of plant adaptation to submergence stress and offers promising solutions for breeding submergence-resistant B. napus accessions.

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