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La variación estructural genómica subyace a la variación de betacianina específica del tipo de célula en Chenopodium
Zheting Zhang1,2,3, Yuwei Wang1, Xiangwei Hu4
1Shanghai Center for Plant Stress Biology, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602, China.
Stress biology
|February 11, 2026
Resumen
La quinua también es conocida como quinoa.
Área de la Ciencia:
- Genética vegetal Genética vegetal
- Ciencias de los cultivos.
- La bioquímica es la bioquímica.
Sus antecedentes:
- La quinua (Chenopodium quinoa) produce betacianinas para la mitigación del estrés.
- La variación rojo/verde en los órganos aéreos de la quinua está relacionada con la acumulación de betacianina.
- Las células de la vejiga epidérmica (EBC) son sitios clave de la localización del pigmento.
Objetivo del estudio:
- Investigar la base genética de la variación rojo/verde en la quinua.
- Identificar los genes responsables de la biosíntesis de la betacianina en las células EBC.
- Comprender el papel de la variación genómica estructural y la especialización del subgenoma.
Principales métodos:
- Secuenciamiento de ARN específico para el tipo de célula de los EBC.
- Análisis genómico de las variaciones estructurales.
- Análisis de la expresión génica a través de los subgenomas de la quinoa.
Principales resultados:
- El gen del citocromo P450 Cqu0091301 (CYP76ADα) está regulado al alza en los glóbulos rojos, actuando como un factor limitante de la tasa.
- Una inserción genómica de 4 kb en la adhesión P0429 restaura la funcionalidad de CYP76ADα.
- Los genes CYP76ADα del subgenoma B son dominantes en los EBC, mientras que los homólogos del subgenoma A se expresan en otros lugares.
Conclusiones:
- La variación genómica estructural tiene un impacto directo en la biosíntesis de betalaína específica del tipo celular en la quinua.
- La divergencia funcional entre los subgenomas contribuye a la regulación del pigmento.
- Este estudio proporciona información molecular sobre el control del pigmento y la especialización del subgenoma en la quinua alotetraploide.
Palabras clave:
La betacianina también es betacianina.Betalain Betalain es un juego de cartas.El CYP76ADα es unLas células de la vejiga epidérmica (EBC, por sus siglas en inglés)El clúster de genes es un grupo de genes.La quinua también es conocida como quinoa.Variación estructural de las variaciones estructurales.El subgenoma es el subgenoma.Variación de las variaciones.
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