Video Experimental Relacionado

Updated: May 5, 2026

High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications

High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications

Published on: May 10, 2016

La APL regula la identidad del tejido vascular en la Arabidopsis

Martin Bonke¹, Siripong Thitamadee, Ari Pekka Mähönen

¹Plant Molecular Biology Laboratory, Institute of Biotechnology, POB 56, FIN-00014, University of Helsinki, Finland.

|November 14, 2003

Resumen

Los investigadores identificaron el gen ALTERED PHLOEM DEVELOPMENT (APL), crucial para la identidad del floema en Arabidopsis. Este gen promueve la diferenciación del floema mientras inhibe el desarrollo del xilema, aclarando el patrón del tejido vascular.

Área de la Ciencia:

Biología vegetal Biología vegetal
Genética molecular genética molecular.
Biología del desarrollo Biología del desarrollo.

Sus antecedentes:

Las plantas vasculares utilizan el floema y el xilema para el transporte de larga distancia.
El floema se compone de elementos de tamiz y células compañeras; el xilema incluye elementos traquearios lignificados.
El control genético del patrón floema-xilema seguía siendo en gran medida desconocido.

Objetivo del estudio:

Para identificar los genes que controlan el patrón de floema-xilema en Arabidopsis.
Para dilucidar la función del gen ALTERED PHLOEM DEVELOPMENT (APL). el desarrollo del floema alterado.

Principales métodos:

Análisis genético de mutantes de la Arabidopsis.
Perfilado de la expresión génica de APL.
Análisis de la expresión de la APL ectópica.

Principales resultados:

El gen ALTERED PHLOEM DEVELOPMENT (APL) es esencial para la identidad del floema.
Una mutación apl recesiva interrumpe el desarrollo del floema, lo que lleva a células similares al xilema en la posición del floema.
La expresión de APL está localizada en el floema en desarrollo.
La expresión ectópica de APL inhibe el desarrollo del xilema.

Conclusiones:

APL actúa como un factor de transcripción MYB que regula el desarrollo vascular.
APL promueve la diferenciación del floema y reprime la diferenciación del xilema.
La APL juega un doble papel en el establecimiento del patrón floema-xilema.

Más Videos Relacionados

Imaging Spatial Reorganization of a MAPK Signaling Pathway Using the Tobacco Transient Expression System

Imaging Spatial Reorganization of a MAPK Signaling Pathway Using the Tobacco Transient Expression System

Published on: March 20, 2016

Identification of the Genes Involved in Stomatal Development via Epidermal Phenotype Scoring

Identification of the Genes Involved in Stomatal Development via Epidermal Phenotype Scoring

Published on: January 20, 2023

Videos de Conceptos Relacionados

Morphogenesis

Morphogenesis

Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.

Short-distance Transport of Resources

Short-distance Transport of Resources

Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.

Regulation of Transpiration by Stomata

Regulation 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.

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...

Plant Tissues

Plant Tissues

Plants are multicellular eukaryotes with tissue systems made of various cell types that carry out specific functions. Different tissues work together to perform a unique function and form an organ. Organs working together form organ systems. Vascular plants have two distinct organ systems: a shoot system and a root system. The shoot system consists of two portions: the vegetative (non-reproductive) parts of the plant, such as the leaves and the stems, and the reproductive parts of the plant,...

Cell Adhesion in Plants

Cell Adhesion in Plants

Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...