ArticlePlant molecular biology2017
Depletion of abscisic acid levels in roots of flooded Carrizo citrange (Poncirus trifoliata L. Raf. × Citrus sinensis L. Osb.) plants is a stress-specific response associated to the differential expression of PYR/PYL/RCAR receptors.
Article in Plant molecular biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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18 citing papers in PubMed, 55 citations in OpenAlex.
- Transcriptomic analyses reveal common heterophylly regulations in eight amphibious eudicots.Plant & cell physiology · 2026Article
- Abscisic Acid Enhances Ex Vitro Acclimatization Performance in Hop (International journal of molecular sciences · 2025Article
- Root Ethylene and Abscisic Acid Responses to Flooding Stress inPlants (Basel, Switzerland) · 2025Article
- Response to Water Stress of Eight Novel and Widely Spread Citrus Rootstocks.Plants (Basel, Switzerland) · 2025Article
- Transcriptomic, Physiological, and Metabolomic Response of an Alpine Plant,International journal of molecular sciences · 2023Article
- Effects of Drought and Flooding on Phytohormones and Abscisic Acid Gene Expression in Kiwifruit.International journal of molecular sciences · 2023Article
- The Role of Aquaporins in Plant Growth under Conditions of Oxygen Deficiency.International journal of molecular sciences · 2022Review
- The Role of Phytohormones in Plant Response to Flooding.International journal of molecular sciences · 2022Review
- Exogenously applied spermidine alleviates hypoxia stress in Phyllostachys praecox seedlings via changes in endogenous hormones and gene expression.BMC plant biology · 2022Article
- A Comprehensive Evaluation of Salt Tolerance in Tomato (Var. Ailsa Craig): Responses of Physiological and Transcriptional Changes in RBOH's and ABA Biosynthesis and Signalling Genes.International journal of molecular sciences · 2022Article
- Exogenous treatment with melatonin enhances waterlogging tolerance of kiwifruit plants.Frontiers in plant science · 2022Article
- Understanding a Mechanistic Basis of ABA Involvement in Plant Adaptation to Soil Flooding: The Current Standing.Plants (Basel, Switzerland) · 2021Review
- An Update on Crop ABA Receptors.Plants (Basel, Switzerland) · 2021Review
- ABA Biosynthesis and Signaling Cascades Under Hypoxia Stress.Frontiers in plant science · 2021Article
- Abscisic Acid as an Emerging Modulator of the Responses of Plants to Low Oxygen Conditions.Frontiers in plant science · 2021Review
- Identification of ABA-Mediated Genetic and Metabolic Responses to Soil Flooding in Tomato (Frontiers in plant science · 2021Article
- Exogenous application of nitric oxide donors regulates short-term flooding stress in soybean.PeerJ · 2019Article
- Phytohormone Abscisic Acid Improves Spatial Memory and Synaptogenesis Involving NDR1/2 Kinase in Rats.Frontiers in pharmacology · 2018Article
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6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Soil flooding reduces root abscisic acid (ABA) levels in citrus, conversely to what happens under drought. Despite this reduction, microarray analyses suggested the existence of a residual ABA signaling in roots of flooded Carrizo citrange seedlings. The comparison of ABA metabolism and signaling in roots of flooded and water stressed plants of Carrizo citrange revealed that the hormone depletion was linked to the upregulation of CsAOG, involved in ABA glycosyl ester (ABAGE) synthesis, and to a moderate induction of catabolism (CsCYP707A, an ABA 8'-hydroxylase) and buildup of dehydrophaseic acid (DPA). Drought strongly induced both ABA biosynthesis and catabolism (CsNCED1, 9-cis-neoxanthin epoxycarotenoid dioxygenase 1, and CsCYP707A) rendering a significant hormone accumulation. In roots of flooded plants, restoration of control ABA levels after stress release was associated to the upregulation of CsBGLU18 (an ABA β-glycosidase) that cleaves ABAGE. Transcriptional profile of ABA receptor genes revealed a different induction in response to soil flooding (CsPYL5) or drought (CsPYL8). These two receptor genes along with CsPYL1 were cloned and expressed in a heterologous system. Recombinant CsPYL5 inhibited ΔNHAB1 activity in vitro at lower ABA concentrations than CsPYL8 or CsPYL1, suggesting its better performance under soil flooding conditions. Both stress conditions induced ABA-responsive genes CsABI5 and CsDREB2A similarly, suggesting the occurrence of ABA signaling in roots of flooded citrus seedlings. The impact of reduced ABA levels in flooded roots on CsPYL5 expression along with its higher hormone affinity reinforce the role of this ABA receptor under soil-flooding conditions and explain the expression of certain ABA-responsive genes.
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