Video Experimental Relacionado
Updated: Jan 21, 2026

10:52
Protocols for Robust Herbicide Resistance Testing in Different Weed Species
Published on: July 2, 2015
15.1K
Un gen de arroz que confiere una resistencia de amplio espectro a los herbicidas β-triketona
Hideo Maeda1, Kazumasa Murata2, Nozomi Sakuma3
1Institute of Crop Science, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8518, Japan.
Resumen
Los científicos descubrieron el gen HIS1 en el arroz, que proporciona resistencia al benzobiciclón (BBC) y herbicidas similares. Este gen
Área de la Ciencia:
- Genética vegetal
- La bioquímica
- Ciencias agrícolas
Sus antecedentes:
- La variación genética en el arroz es crucial para la mejora de los cultivos.
- Algunas variedades de arroz son sensibles al benzobiciclón (BBC), un herbicida que inhibe la HPPD.
- La comprensión de los mecanismos de resistencia a los herbicidas es vital para la agricultura.
Objetivo del estudio:
- Identificar el gen responsable de la resistencia al herbicida benzobiciclón (BBC) en el arroz.
- Para aclarar el mecanismo por el cual este gen confiere resistencia.
- Para explorar el potencial de este gen para la cría de cultivos resistentes a los herbicidas.
Principales métodos:
- Identificación genética y clonación.
- Ensayos de actividad enzimática para determinar el mecanismo de desintoxicación.
- Análisis de la expresión génica en el arroz y la arabidopsis.
- Pruebas de sensibilidad a herbicidas en plantas transgénicas.
Principales resultados:
- Se identificó un gen de arroz, HIS1 (HPPD INHIBITOR SENSITIVE 1), que confiere resistencia a la BBC y a otros herbicidas β-triketona.
- HIS1 codifica una oxigenasa dependiente de Fe (II) / 2-oxoglutarato que hidroxila y desintoxica estos herbicidas.
- Se rastrearon alelos HIS1 disfuncionales en variedades de arroz indica, lo que explica la sensibilidad de la BBC.
- La *Arabidopsis* transgénica que expresaba HIS1 mostró resistencia a múltiples herbicidas β-triketona.
Conclusiones:
- HIS1 es un gen clave para la resistencia al herbicida β-triketona en el arroz.
- El mecanismo de desintoxicación del gen HIS1 ofrece una vía para desarrollar cultivos resistentes a los herbicidas.
- HIS1 tiene un potencial significativo para futuros programas de mejoramiento agrícola.
Videos de Conceptos Relacionados
Plant Breeding and Biotechnology
21.5K
Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
21.5K
The Electromagnetic Spectrum
64.8K
The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
64.8K
The Electromagnetic Spectrum
33.3K
Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
33.3K
Gene Flow
37.5K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
37.5K
IR Spectrum
2.0K
When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
2.0K
Cell Specific Gene Expression
16.3K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
16.3K

