Rice plants encounter a sequence of environmental perturbations in the natural progression of a flash flood: submergence, reoxygenation, and dehydration. The master regulator of submergence tolerance, SUB1A, coordinates acclimation to all three stresses, providing enhanced tolerance to oxidative stress and dehydration, as well as submergence. Submergence and drought are major constraints to rice (Oryza sativa) production in rain-fed farmlands, both of which can occur sequentially during a single crop cycle. SUB1A, an ERF transcription factor found in limited rice accessions, dampens ethylene production and gibberellic acid responsiveness during submergence, economizing carbohydrate reserves and significantly prolonging endurance. Here, we evaluated the functional role of SUB1A in acclimation to dehydration. Comparative analysis of genotypes with and without SUB1A revealed that SUB1A enhanced recovery from drought at the vegetative stage through reduction of leaf water loss and lipid peroxidation and increased expression of genes associated with acclimation to dehydration. Overexpression of SUB1A augmented ABA responsiveness, thereby activating stress-inducible gene expression. Paradoxically, vegetative tissue undergoes dehydration upon desubmergence even though the soil contains sufficient water, indicating that leaf desiccation occurs in the natural progression of a flooding event. Desubmergence caused the upregulation of gene transcripts associated with acclimation to dehydration, with higher induction in SUB1A genotypes. SUB1A also restrained accumulation of reactive oxygen species (ROS) in aerial tissue during drought and desubmergence. Consistently, SUB1A increased the abundance of transcripts encoding ROS scavenging enzymes, resulting in enhanced tolerance to oxidative stress. Therefore, in addition to providing robust submergence tolerance, SUB1A improves survival of rapid dehydration following desubmergence and water deficit during drought.
The Submergence Tolerance Regulator SUB1A Mediates Crosstalk between Submergence and Drought Tolerance in Rice[W][OA]
T. Fukao,E. Yeung,J. Bailey-Serres
Published 2010 in The Plant Cell
ABSTRACT
PUBLICATION RECORD
- Publication year
2010
- Venue
The Plant Cell
- Publication date
2010-01-14
- Fields of study
Biology, Medicine, Environmental Science
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
- SUB1A restrains reactive oxygen species accumulation in aerial tissue during drought and desubmergence and increases transcripts encoding ROS-scavenging enzymes, supporting greater oxidative stress tolerance.박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review
CONCEPTS
- abscisic acid responsiveness
The degree to which plant tissues respond to ABA signaling during stress conditions.
Aliases: ABA responsiveness
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review - dehydration
Water-loss stress affecting vegetative tissue during drought or after emergence from submergence.
Aliases: desiccation
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review - desubmergence
The transition event in which submerged rice plants re-expose aerial tissues after floodwater recedes.
Aliases: emergence from submergence
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review - drought tolerance
The capacity of rice plants to maintain function and survive under water-deficit conditions.
Aliases: drought resistance
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review - oxidative stress
Cellular stress associated with excess reactive oxygen species and associated molecular damage.
Aliases: oxidative damage
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review - reactive oxygen species
Highly reactive oxygen-derived molecules that accumulate during environmental stress and can damage cellular components.
Aliases: ROS
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review - sub1a
An ethylene response factor transcription factor in rice that regulates stress acclimation during flooding and water deficit.
Aliases: SUB1A transcription factor
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review - submergence tolerance
The capacity of rice plants to endure prolonged flooding or complete submergence.
Aliases: flood tolerance
박진우 (dztg5apj7m) extractionB (s683577b42) reviewAK (4715169a40) reviewjihoonc (k5vuy3tzcm) reviewGahyoun (29ua5897xm) review
REFERENCES
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