Touch induces ATP release in Arabidopsis roots that is modulated by the heterotrimeric G-protein complex

Weerasinghe, Ravisha R.; Swanson, Sarah J.; Okada, Seiko F.; Garrett, Michele B.; Kim, Sung-Yong; Stacey, Gary; Boucher, Richard C.; Gilroy, Simon; Jones, Alan M.

doi:10.1016/j.febslet.2009.07.007

Forskningsartikel2009Vetenskapligt granskadÖppen tillgång

Touch induces ATP release in Arabidopsis roots that is modulated by the heterotrimeric G-protein complex

Weerasinghe, Ravisha R.; Swanson, Sarah J.; Okada, Seiko F.; Garrett, Michele B.; Kim, Sung-Yong; Stacey, Gary; Boucher, Richard C.; Gilroy, Simon; Jones, Alan M.

Sammanfattning

Amongst the many stimuli orienting the growth of plant roots, of critical importance are the touch signals generated as roots explore the mechanically complex soil environment. However, the molecular mechanisms behind these sensory events remain poorly defined. We report an impaired obstacle-avoiding response of roots in Arabidopsis lacking a heterotrimeric G-protein. Obstacle avoidance may utilize a touch-induced release of ATP to the extracellular space. While sequential touch stimulation revealed a strong refractory period for ATP release in response to mechano-stimulation in wild-type plants, the refractory period in mutants was attenuated, resulting in extracellular ATP accumulation. We propose that ATP acts as an extracellular signal released by mechano-stimulation and that the G-protein complex is needed for fine-tuning this response. (c) 2009 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

Nyckelord

Arabidopsis; ATP; Heterotrimeric G-protein; Touch desensitization

Publicerad i

FEBS Letters
2009, volym: 583, nummer: 15, sidor: 2521-2526

SLU författare

Kim, Sung-Yong
- University of Missouri

UKÄ forskningsämne

Botanik

Publikationens identifierare

DOI: https://doi.org/10.1016/j.febslet.2009.07.007

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/90777