Your browser doesn't support javascript.
loading
PagKNAT2/6b promotes shoot branching by attenuating auxin-strigolactone signalling in poplar.
Zhao, Yan-Qiu; Song, Xue-Qin; Guo, Wei; Jiang, Cheng; Zhang, Jin; Lu, Meng-Zhu.
Afiliación
  • Zhao YQ; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Key Laboratory of Modern Silvicultural Technology of Zhejiang Province, Hangzhou, Zhejiang, China.
  • Song XQ; The Engineering Research, Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China.
  • Guo W; State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China.
  • Jiang C; Taishan Academy of Forestry Sciences, Taian, Shandong, China.
  • Zhang J; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Key Laboratory of Modern Silvicultural Technology of Zhejiang Province, Hangzhou, Zhejiang, China.
  • Lu MZ; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Key Laboratory of Modern Silvicultural Technology of Zhejiang Province, Hangzhou, Zhejiang, China.
Plant Cell Environ ; 2024 Jun 07.
Article en En | MEDLINE | ID: mdl-38847345
ABSTRACT
Shoot branching from axillary bud (AB) directly determines plant architecture. However, the mechanism through which AB remains dormant or emerges to form branches as plants grow remains largely unknown. Here, the auxin-strigolactone (IAA-SL) pathway was first shown to regulate shoot branching in poplar, and we found that PagKNAT2/6b could modulate this pathway. PagKNAT2/6b was expressed mainly in the shoot apical meristem and AB and was induced by shoot apex damage. PagKNAT2/6b overexpressing poplar plants (PagKNAT2/6b OE) exhibited multiple branches that mimicked the branching phenotype of nontransgenic plants after decapitation treatment, while compared with nontransgenic controls, PagKNAT2/6b antisense transgenic poplar and Pagknat2/6b mutant lines exhibited a significantly decreased number of branches after shoot apex damage treatment. In addition, we found that PagKNAT2/6b directly inhibits the expression of the key IAA synthesis gene PagYUC6a, which is specifically expressed in the shoot apex. Moreover, overexpression of PagYUC6a in the PagKNAT2/6b OE background reduced the number of branches after shoot apex damage treatment. Overall, we conclude that PagKNAT2/6b responds to shoot apical injury and regulates shoot branching through the IAA-SL pathway. These findings may provide a theoretical basis and candidate genes for genetic engineering to create new forest tree species with different crown types.
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Plant Cell Environ Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Plant Cell Environ Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos