Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus

Sammanfattning

The plant hormone ethylene is an important signal in plant growth responses to environmental cues. In vegetative growth, ethylene is generally considered as a regulator of cell expansion, but a role in the control of meristem growth has also been suggested based on pharmacological experiments and ethylene-overproducing mutants. In this study, we used transgenic ethylene-insensitive and ethylene-overproducing hybrid aspen (Populus tremula x tremuloides) in combination with experiments using an ethylene perception inhibitor [1-methylcyclopropene (1-MCP)] to demonstrate that endogenous ethylene produced in response to leaning stimulates cell division in the cambial meristem. This ethylene-controlled growth gives rise to the eccentricity of Populus stems that is formed in association with tension wood.

Nyckelord

plant hormones; secondary xylem; tension wood; vascular cambium; wood development

Publicerad i

Proceedings of the National Academy of Sciences
2009, volym: 106, nummer: 14, sidor: 5984-5989

SLU författare

• Love, Jonathan

  • Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
    

• Björklund, Simon

  • Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
    

• Sundberg, Björn

  • Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Skogsvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1073/pnas.0811660106

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/28551