Submergence tolerance of rainfed lowland rice: search for physiological marker traits

Singh, H. P.; Singh, B. B.; Ram, P. C.

doi:10.1078/0176-1617-00036

Cited by 64 publications

(43 citation statements)

References 11 publications

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“…Findings with these near-isogenic lines were generally consistent with early studies that compared FR13A to unrelated submergence intolerant varieties. Overall, the submergence tolerance conferred by the SUB1 haplotype from FR13A is correlated with better maintenance of total soluble carbohydrates and limited elongation growth, lower aldehyde contents, less chlorophyll degradation, and less oxidative damage upon reoxygenation (Jackson and Ram 2003;Setter and Laureles 1996;Setter et al 1997;Singh et al 2001;Ella et al 2003;Das et al 2005;Fukao et al 2006;Fukao and Bailey-Serres 2008). The finding of strong SUB1A-1 promoter activity in internodes and in the collar region and leaf base is consistent with a role in suppressing division and elongation of cells (Singh et al 2010).…”

Section: Sub1c Sub1bsupporting

confidence: 62%

Submergence Tolerant Rice: SUB1’s Journey from Landrace to Modern Cultivar

Bailey‐Serres

Fukao

Ronald

et al. 2010

Rice

327

226

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Rice landraces tolerant of up to 2 weeks of complete submergence were collected from farmers' fields in the 1950s. Success in fine mapping of SUBMERGENCE 1 (SUB1), a robust quantitative trait locus from the submergence tolerant FR13A landrace, has enabled marker-assisted breeding of high-yielding rice capable of enduring transient complete submergence. At the molecular level, SUB1 is a variable polygenic locus encoding two or three ethylene responsive factor (ERF) DNA binding proteins. All Oryza sativa accessions encode SUB1B and SUB1C at this locus. An additional ERF, SUB1A, is present at SUB1 in FR13A and other tolerant accessions. The induction of SUB1A expression by ethylene during submergence disrupts the elongation escape strategy typical of lowland and deepwater rice, by limiting ethylene-induced gibberellic acid-promoted elongation. Microarray and metabolite studies confirm that SUB1A orchestrates its effects on metabolism and growth in a submergence-dependent manner. Due to the conditional activity of SUB1A, new "Sub1" mega-varieties effectively provide submergence tolerance without apparent ill effect on development, productivity, or grain quality.

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Section: Sub1c Sub1bsupporting

confidence: 62%

Submergence Tolerant Rice: SUB1’s Journey from Landrace to Modern Cultivar

Bailey‐Serres

Fukao

Ronald

et al. 2010

Rice

327

226

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“…Generally, submergence-sensitive lowland rice cultivars elongate more rapidly than tolerant cultivars under submergence stress (Singh et al, 2001;Das et al, 2005). To examine whether the Sub1 haplotype controls growth rate, plant height was compared in M202 and M202(Sub1) plants grown under normal (aerobic) or submerged conditions for 14 d ( Figure 3A).…”

Section: Differential Regulation Of Elongation Under Submergence Is Cmentioning

confidence: 99%

“…Lowland rice cultivars are typically cultivated in flooded paddies but are generally intolerant of complete submergence. The submergence-tolerant East Indian accession FR13A restricts leaf and internode elongation during inundation and can recommence the initiation of leaf development upon desubmergence (Singh et al, 2001;Das et al, 2005). Physiological responses to submergence stress in rice have been compared using tolerant and intolerant varieties.…”

Section: Introductionmentioning

confidence: 99%

A Variable Cluster of Ethylene Response Factor–Like Genes Regulates Metabolic and Developmental Acclimation Responses to Submergence in Rice

et al. 2006

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Submergence-1 (Sub1), a major quantitative trait locus affecting tolerance to complete submergence in lowland rice (Oryza sativa), contains two or three ethylene response factor (ERF)-like genes whose transcripts are regulated by submergence. In the submergence-intolerant japonica cultivar M202, this locus encodes two ERF genes, Sub1B and Sub1C. In the tolerant near-isogenic line containing the Sub1 locus from the indica FR13A, M202(Sub1), the locus additionally encodes the ERF gene Sub1A. During submergence, the tolerant M202(Sub1) displayed restrained leaf and internode elongation, chlorophyll degradation, and carbohydrate consumption, whereas the enzymatic activities of pyruvate decarboxylase and alcohol dehydrogenase were increased significantly compared with the intolerant M202. Transcript levels of genes associated with carbohydrate consumption, ethanolic fermentation, and cell expansion were distinctly regulated in the two lines. Sub1A and Sub1C transcript levels were shown to be upregulated by submergence and ethylene, with the Sub1C allele in M202 also upregulated by treatment with gibberellic acid (GA). These findings demonstrate that the Sub1 region haplotype determines ethylene-and GA-mediated metabolic and developmental responses to submergence through differential expression of Sub1A and Sub1C. Submergence tolerance in lowland rice is conferred by a specific allele variant of Sub1A that dampens ethylene production and GA responsiveness, causing quiescence in growth that correlates with the capacity for regrowth upon desubmergence.

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“…If rapidly submerged, deepwater and most lowland varieties hasten internode and/or leaf elongation to escape the inundation but die within 10-14 days if aerial tissue remains underwater (2,3). By contrast, submergence-tolerant lowland varieties including Flood Resistant 13A (FR13A) overcome complete submergence through a restriction in shoot elongation and carbohydrate consumption, thereby conserving energy reserves to enable recommencement of development upon desubmergence (3)(4)(5)(6).…”

mentioning

confidence: 99%

Submergence tolerance conferred by Sub1A is mediated by SLR1 and SLRL1 restriction of gibberellin responses in rice

Fukao

Bailey‐Serres

2008

Proc. Natl. Acad. Sci. U.S.A.

402

376

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Submergence-tolerant rice maintains viability during complete submergence by limiting underwater elongation until floodwaters recede. Acclimation responses to submergence are coordinated by the submergence-inducible Sub1A, which encodes an ethylene-responsive factor-type transcription factor (ERF). Sub1A is limited to tolerant genotypes and sufficient to confer submergence tolerance to intolerant accessions. Here we evaluated the role of Sub1A in the integration of ethylene, abscisic acid (ABA), and gibberellin (GA) signaling during submergence. The submergence-stimulated decrease in ABA content was Sub1A-independent, whereas GA-mediated underwater elongation was significantly restricted by Sub1A. Transgenics that ectopically express Sub1A displayed classical GA-insensitive phenotypes, leading to the hypothesis that Sub1A limits the response to GA. Notably Sub1A increased the accumulation of the GA signaling repressors Slender Rice-1 (SLR1) and SLR1 Like-1 (SLRL1) and concomitantly diminished GA-inducible gene expression under submerged conditions. In the Sub1A overexpression line, SLR1 protein levels declined under prolonged submergence but were accompanied by an increase in accumulation of SLRL1, which lacks the DELLA domain. In the presence of Sub1A, the increase in these GA signaling repressors and decrease in GA responsiveness were stimulated by ethylene, which promotes Sub1A expression. Conversely, ethylene promoted GA responsiveness and shoot elongation in submergence-intolerant lines. Together, these results demonstrate that Sub1A limits ethylenepromoted GA responsiveness during submergence by augmenting accumulation of the GA signaling repressors SLR1 and SLRL1.abscisic acid ͉ ethylene ͉ flooding ͉ GRAS-domain protein

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Submergence tolerance of rainfed lowland rice: search for physiological marker traits

Cited by 64 publications

References 11 publications

Submergence Tolerant Rice: SUB1’s Journey from Landrace to Modern Cultivar

Submergence Tolerant Rice: SUB1’s Journey from Landrace to Modern Cultivar

A Variable Cluster of Ethylene Response Factor–Like Genes Regulates Metabolic and Developmental Acclimation Responses to Submergence in Rice

Submergence tolerance conferred by Sub1A is mediated by SLR1 and SLRL1 restriction of gibberellin responses in rice

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