Video Experimental Relacionado

Updated: Jan 8, 2026

Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter

Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter

Published on: September 17, 2016

OsMYB44 regula la expresión de Early heading date 1 para la floración fotoperiódica

Hyeryung Yoon¹, Sang-Ji Lee¹, Jinku Kang¹

¹Department of Agriculture, Forestry and Bioresources, Plant Genomics and Breeding Institute, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea.

Plant physiology

|December 17, 2025

Resumen

OsMYB44 regula el tiempo de floración del arroz interactuando con genes clave de floración como Hd1. Las variaciones naturales en OsMYB44 ayudaron al arroz a adaptarse a diversas latitudes durante la domesticación.

Área de la Ciencia:

Biología Vegetal
Genética
Biología Molecular

Sus antecedentes:

El fotoperiodo es un factor ambiental crucial que influye en el tiempo de floración de las plantas.
Las variaciones genéticas en los reguladores de la floración fueron vitales para la adaptación del arroz durante la domesticación.

Objetivo del estudio:

Investigar el papel de la proteína OsMYB44 tipo R2R3-MYB en la floración fotoperiódica del arroz.
Elucidar los mecanismos moleculares subyacentes a la función de OsMYB44 en el control del tiempo de floración.

Principales métodos:

Análisis de sobreexpresión génica y mutantes knockout en arroz (Oryza sativa).
Estudios de interacción proteína-proteína (por ejemplo, levadura de dos híbridos o co-inmunoprecipitación).
Análisis de la unión de OsMYB44 a promotores de genes diana (por ejemplo, ChIP-qPCR).
Análisis de variación natural e identificación de haplotipos de OsMYB44.

Principales resultados:

La sobreexpresión de OsMYB44 aceleró la floración en condiciones de día corto y la retrasó en condiciones de día largo.
Los mutantes osmyb44 exhibieron un retraso en la floración en condiciones de día corto.
OsMYB44 interactúa con Hd1, DTH8 y OsNF-YC2, participando en un complejo transcripcional NF-Y.
OsMYB44 se une a las regiones promotoras de Early heading date 1 (Ehd1) y activa su expresión.
Se identificaron cuatro haplotipos de OsMYB44, con variaciones que podrían afectar la unión de Hd1 y el tiempo de floración.
La distribución geográfica de los haplotipos sugiere un papel en la adaptación regional durante la domesticación del arroz.

Conclusiones:

OsMYB44 es un regulador clave de la floración fotoperiódica en el arroz.
OsMYB44 funciona interactuando con Hd1 y otras proteínas relacionadas con la floración para modular la expresión génica.
La variación natural en OsMYB44 contribuyó significativamente a la adaptación del arroz a diferentes latitudes durante su domesticación.

Palabras clave:

Ehd1 Hd1 OsMYB44 Arroz tiempo de floración variación alélica natural

Más Videos Relacionados

Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana

Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana

Published on: May 29, 2010

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Published on: October 14, 2022

Videos de Conceptos Relacionados

Biological Clocks and Seasonal Responses

Biological Clocks and Seasonal Responses

The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.

Osmoregulation in Insects

Osmoregulation 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.

Photoreceptors and Plant Responses to Light

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.

Cell Signaling in Plants

Cell 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...

Circadian Rhythms and Gene Regulation

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...

Gene Regulation During Sporulation

Gene 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...