Related Experiment Video
Updated: Aug 6, 2026
10:29
Measuring Gene Expression in Bombarded Barley Aleurone Layers with Increased Throughput
Published on: March 30, 2018
OsMYBAS1 Coordinates ABA/JA Signaling and ROS Homeostasis for Seedling Cold Tolerance of Rice (Oryza sativa L.)
Xinjian Zou1,2, Hong Xie1, Juan Ye1
1Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Sciences, Jiangxi Normal University, Nanchang, 330022, Jiangxi, China.
Rice (New York, N.Y.)
|July 20, 2026
Summary
Dongxiang wild rice (DXWR) possesses strong cold tolerance due to the OsMYBAS1 gene. This R2R3-MYB transcription factor regulates abscisic acid/jasmonic acid signaling and reactive oxygen species homeostasis, enhancing seedling survival under cold stress.
Area of Science:
- Plant Science
- Genetics
- Molecular Biology
Background:
- Seedling cold stress severely limits rice production.
- Wild rice, specifically Dongxiang wild rice (DXWR, Oryza rufipogon Griff.), is a valuable source of cold tolerance genes.
- The molecular mechanisms of cold tolerance in DXWR are not well understood.
Purpose of the Study:
- To identify key genes and molecular mechanisms conferring cold tolerance in DXWR.
- To investigate the role of OsMYBAS1 in regulating cold response in rice.
Main Methods:
- Integrated high-density gene chip, comparative transcriptomics, and functional correlation analyses.
- Generated and analyzed Osmybas1 mutants under cold stress.
- Measured endogenous hormone levels (abscisic acid and jasmonic acid) and reactive oxygen species (ROS).
Main Results:
- OsMYBAS1 was identified as a crucial regulator of cold tolerance in DXWR.
- Osmybas1 mutants showed reduced survival, increased ROS, and decreased antioxidant activity under cold stress.
- OsMYBAS1 modulates abscisic acid (ABA) and jasmonic acid (JA) signaling pathways and ROS homeostasis.
Conclusions:
- OsMYBAS1 positively regulates seedling cold tolerance in rice by coordinating ABA/JA signaling and ROS balance.
- This study provides insights into DXWR's cold tolerance mechanisms and identifies OsMYBAS1 as a potential target for breeding cold-tolerant rice varieties.
Related Concept Videos
01:25Cell Signaling in Plants
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
01:57Adaptations that Reduce Water Loss
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
01:17Gene Regulation During Sporulation
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
01:47Osmoregulation in Insects
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
02:04Regulation of Transpiration by Stomata
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
01:28Global Regulatory Systems
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...