Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

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.

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...

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...

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.

Transcription

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...

Position-effect Variegation

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por

Same author

Power-law penalties correct distance bias in single-cell co-accessibility and deep-learning chromatin interaction predictions.

NAR genomics and bioinformatics·2026

Same author

Phylogeny-aware comparative genomics of <i>Vibrio vulnificus</i> links genetic traits to pathogenicity.

mBio·2026

Same author

The danger zone: The joint trap of incomplete lineage sorting and long-branch attraction in resolving the Gondwanan origin of Rafflesiaceae and Apodanthaceae.

American journal of botany·2026

Same author

Lineage-specific evolution of regulatory landscapes in a polyploid plant and its diploid progenitors.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same author

Seasonal differences in predation risk among seagrass epifauna species stabilize community-level predation over time.

Ecology·2026

Same author

Single-cell chromatin accessibility and cis-regulatory element analyses in plants using the scPlantReg platform.

Nature plants·2026

Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026

Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026

Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026

Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026

Same journal

Retraction.

Science (New York, N.Y.)·2026

Same journal

Making time.

Science (New York, N.Y.)·2026

Ver todos los artículos relacionados

Search research articles

Video Experimental Relacionado

Updated: Jul 15, 2025

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

Un reloj epigenético evolutivo en las plantas

N Yao¹, Z Zhang², L Yu³

¹Department of Genetics, University of Georgia, Athens, GA, USA.

Science (New York, N.Y.)

|September 28, 2023

Resumen

Este resumen es generado por máquina.

Un nuevo "reloj de epimutación" utiliza cambios en la metilación del ADN para datar la evolución de las plantas a lo largo de años y siglos, mucho más rápido que los relojes moleculares tradicionales. Este método reconstruye con precisión los árboles genealógicos de las plantas, ofreciendo nuevas herramientas para la investigación de la biodiversidad.

Más Videos Relacionados

Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo

Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo

Published on: January 14, 2016

Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

Published on: June 7, 2013

Videos de Experimentos Relacionados

Last Updated: Jul 15, 2025

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

Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo

Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo

Published on: January 14, 2016

Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

Published on: June 7, 2013

Área de la Ciencia:

Biología evolutiva
La genómica
La epigenética

Sus antecedentes:

Los relojes moleculares basados en secuencias de ADN son esenciales para la datación macroevolucionaria, pero son demasiado lentos para la historia evolutiva reciente.
Los relojes de ADN clásicos operan en escalas de tiempo de 10 a 10 años, lo que limita su utilidad para eventos de diversificación recientes.

Objetivo del estudio:

Introducir y validar un nuevo reloj molecular de alta resolución basado en cambios de metilación del ADN.
Para demostrar la utilidad de este "reloj de epimutación" para reconstruir filogenias vegetales recientes.

Principales métodos:

Investigó cambios estocásticos de metilación del ADN en citocinas específicas en genomas de plantas.
Desarrolló y aplicó el "reloj de epimutación" para la datación filogenética en escalas de tiempo de años a siglos.
Experimentalmente se validó la precisión del reloj usando Arabidopsis thaliana y Zostera marina.

Principales resultados:

Los cambios en la metilación del ADN muestran un comportamiento de reloj, operando órdenes de magnitud más rápidas que los relojes basados en el ADN.
El reloj de epimutación recapituló con éxito los árboles filogenéticos intraespecíficos conocidos y los tiempos de divergencia.
Resultados validados tanto en una planta autofertilizante (*Arabidopsis thaliana*) como en una planta clonal (*Zostera marina*).

Conclusiones:

El reloj de epimutación proporciona una nueva herramienta poderosa para estudios temporales de alta resolución en la evolución de las plantas.
Este descubrimiento abre caminos para explorar la biodiversidad de las plantas y la dinámica evolutiva en escalas de tiempo recientes.
Los cambios epigenéticos ofrecen un método más rápido y preciso para el análisis filogenético en las plantas.