Related Experiment Video
Updated: Jan 7, 2026
11:33
Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer
Published on: October 14, 2022
2.0K
OsPM19L Coordinates Phytohormone Signaling to Regulate Axillary Bud Outgrowth and Regeneration in Ratoon Rice.
Ruoxi Li1, Binbin Chi2, Wei Su1
1State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China.
Plants (Basel, Switzerland)
|December 31, 2025
Summary
We identified OsPM19L as a key regulator of rice ratooning ability, crucial for improving crop yields. This gene links abscisic acid (ABA) signaling with other hormones to control bud growth for a second harvest.
Area of Science:
- Plant Molecular Biology
- Agricultural Science
- Crop Physiology
Background:
- Ratoon rice cultivation enables a second harvest from crop stubble, but yield is limited by axillary bud regeneration.
- Understanding the genetic regulation of ratooning is vital for enhancing rice productivity.
Purpose of the Study:
- To identify key regulators of rice ratooning ability.
- To elucidate the molecular mechanisms underlying axillary bud regeneration in rice.
Main Methods:
- Transcriptome analysis to compare gene expression in different rice cultivars.
- Promoter assays and hormonal treatments to study gene function.
- Field trials with gene mutants and overexpression lines.
- Phytohormone profiling and gene expression analysis in regenerating buds.
Main Results:
- OsPM19L, a plasma membrane protein, was identified as a crucial regulator of rice ratooning.
- OsPM19L expression is induced by ABA and positively regulates ABA signaling.
- Mutants and overexpressing plants showed distinct effects on tillering and ratooning index, indicating stage-specific roles.
- OsPM19L influences multiple phytohormone levels (CK, GA, IAA, ABA) in axillary buds, promoting dormancy release and growth.
Conclusions:
- OsPM19L acts as a central regulator linking ABA signaling with hormonal crosstalk in rice regeneration.
- This finding provides new molecular insights into controlling regeneration for improved ratoon rice productivity.
Related Concept Videos
01:25Cell Signaling in Plants
6.1K
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...
6.1K
01:56Plant Hormones
27.1K
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
27.1K
01:17Gene Regulation During Sporulation
401
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...
401
02:36Meristems and Plant Growth
48.9K
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
48.9K
03:02Primary and Secondary Growth in Roots and Shoots
60.0K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
60.0K
02:35Key Elements for Plant Nutrition
23.8K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
23.8K