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The Submergence Tolerance Regulator SUB1A Mediates Crosstalk between Submergence and Drought Tolerance in Rice

Open access
Fukao, Takeshi, Yeung, Elaine, Bailey-Serres, Julia·2011·The Plant Cell

Abstract

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.

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Metadata

Authors
Fukao, T., Yeung, E., & Bailey-Serres, J.
Venue
The Plant Cell
Published
2010-01-14
Volume
23
Issue
1
Pages
412-427
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2111157010
Cited by
572
References
63
FWCI
28.74
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: The Submergence Tolerance Regulator SUB1A Mediates Crosstalk between Submergence and Drought Tolerance in Rice. https://app.cochat.ai/papers/10.1105/tpc.110.080325
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Fukao, T., Yeung, E., & Bailey-Serres, J. (2011). The Submergence Tolerance Regulator SUB1A Mediates Crosstalk between Submergence and Drought Tolerance in Rice. The Plant Cell. https://doi.org/10.1105/tpc.110.080325

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