ArticlePlant cell reports2021
Expression of Arabidopsis Ornithine Aminotransferase (AtOAT) encoded gene enhances multiple abiotic stress tolerances in wheat.
Article in Plant cell reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed.
- Beyond osmoprotection: the expanding roles of proline in plant signalling and development.Biologia futura · 2026Review
- Transcriptome analysis of safflower (Carthamus tinctorius L.) reveals the roles of osmotic adjustment and regulatory mechanisms in response to drought stress.BMC plant biology · 2026Article
- Regulation of redox homeostasis and proline metabolism by tea polyphenols ameliorates salinity tolerance during wheat seed germination and early seedling growth.BMC plant biology · 2026Article
- Anthocyanin biosynthesis enhances alkaline stress tolerance by upregulating antioxidant machinery and modulating ROS levels in three red landraces of rice.BMC plant biology · 2025Article
- Genomics-assisted breeding for designing salinity-smart future crops.Plant biotechnology journal · 2025Review
- Evaluation of the molecular mechanism underlying proline metabolic and catabolic pathways and some morpho-physiological traits of tobacco (Nicotiana tabacum L.) plants under arsenic stress.BMC plant biology · 2025Article
- Insights into the Role ofInternational journal of molecular sciences · 2025Article
- Ornithine enantiomers modulate essential oil yield and constituents and gene expression of monoterpenes synthase in Salvia officinalis under well-watered and drought stress conditions.BMC plant biology · 2025Article
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- Molecular characterization reveals that OsSAPK3 improves drought tolerance and grain yield in rice.BMC plant biology · 2023Article
- Candidate Genes Associated with Abiotic Stress Response in Plants as Tools to Engineer Tolerance to Drought, Salinity and Extreme Temperatures in Wheat: An Overview.Plants (Basel, Switzerland) · 2022Review
- Flooding and herbivory: the effect of concurrent stress factors on plant volatile emissions and gene expression in two heirloom tomato varieties.BMC plant biology · 2022Article
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- Rehydration Compensation of Winter Wheat Is Mediated by Hormone Metabolism and De-Peroxidative Activities Under Field Conditions.Frontiers in plant science · 2022Article
- Identification and expression profiling of proline metabolizing genes inPhysiology and molecular biology of plants : an international journal of functional plant biology · 2021Article
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6 authors.
Funding
Abstract
key messageThe drought and salt tolerances of wheat were enhanced by ectopic expression of the Arabidopsis ornithine aminotransferase (AtOAT) encoded gene. The OAT was confirmed to play a role in proline biosynthesis in wheat. Proline (Pro) accumulation is a common response to both abiotic and biotic stresses in plants. Ornithine aminotransferase (OAT) is pyridoxal-5-phosphate dependent enzyme involved in plant proline biosynthesis. During stress condition, proline is synthesized via glutamate and ornithine pathways. The OAT is the key enzyme in ornithine pathway. In this study, an OAT gene AtOAT from Arabidopsis was expressed in wheat for its functional characterization under drought, salinity, and heat stress conditions. We found that the expression of AtOAT enhanced the drought and salt stress tolerances of wheat by increasing the proline content and peroxidase activity. In addition, it was confirmed that the expression of AtOAT also played a partial tolerance to heat stress in the transgenic wheat plants. Moreover, quantitative real-time PCR (qRT-PCR) analysis showed that the transformation of AtOAT up-regulated the expression of the proline biosynthesis associated genes TaOAT, TaP5CS, and TaP5CR, and down-regulated that of the proline catabolism related gene TaP5CDH in the transgenic plants under stress conditions. Moreover, the genes involved in ornithine pathway (Orn-OAT-P5C/GSA-P5CR-Pro) were up-regulated along with the up-regulation of those genes involved in glutamate pathway (Glu-P5CS-P5C/GSA-P5CR-Pro). Therefore, we concluded that the expression of AtOAT enhanced wheat abiotic tolerance via modifying the proline biosynthesis by up-regulating the expression of the proline biosynthesis-associated genes and down-regulating that of the proline catabolic gene under stresses condition.
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