Spatio-temporal relief from hypoxia and production of reactive oxygen species during bud burst in grapevine (Vitis vinifera)

Annals of Botany
Karlia MeithaMichael J Considine

Abstract

Plants regulate cellular oxygen partial pressures (pO2), together with reduction/oxidation (redox) state in order to manage rapid developmental transitions such as bud burst after a period of quiescence. However, our understanding of pO2 regulation in complex meristematic organs such as buds is incomplete and, in particular, lacks spatial resolution. The gradients in pO2 from the outer scales to the primary meristem complex were measured in grapevine (Vitis vinifera) buds, together with respiratory CO2 production rates and the accumulation of superoxide and hydrogen peroxide, from ecodormancy through the first 72 h preceding bud burst, triggered by the transition from low to ambient temperatures. Steep internal pO2 gradients were measured in dormant buds with values as low as 2·5 kPa found in the core of the bud prior to bud burst. Respiratory CO2 production rates increased soon after the transition from low to ambient temperatures and the bud tissues gradually became oxygenated in a patterned process. Within 3 h of the transition to ambient temperatures, superoxide accumulation was observed in the cambial meristem, co-localizing with lignified cellulose associated with pro-vascular tissues. Thereafter, superoxide accumulated i...Continue Reading

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Citations

Apr 8, 2016·Journal of Experimental Botany·Michael J Considine, John A Considine
Feb 13, 2016·Plant, Cell & Environment·Graham NoctorChristine H Foyer
Aug 13, 2015·Plant, Cell & Environment·Christine H Foyer, Graham Noctor
Dec 18, 2016·Trends in Plant Science·Michael J ConsidineChristine H Foyer
Jan 18, 2018·Plant, Cell & Environment·Karlia MeithaMichael J Considine
Aug 24, 2017·Physiologia Plantarum·Sylvia LindbergIda Lager
May 17, 2019·Nature·Daan A WeitsFrancesco Licausi
May 1, 2019·Journal of Experimental Botany·Santiago SignorelliMichael J Considine
Jan 17, 2020·The New Phytologist·Daan A WeitsFrancesco Licausi
Dec 10, 2015·Annals of Botany·Michael J ConsidineChristine Helen Foyer
Jun 6, 2018·Frontiers in Plant Science·Rémi BeauvieuxElisabeth Dirlewanger
Jan 29, 2019·Frontiers in Plant Science·Vítor da Silveira FalavignaFernando Andrés
Jan 1, 2021·International Journal of Food Science·Karlia MeithaSony Suhandono
Aug 10, 2021·Frontiers in Plant Science·Manikandan VeerabaguChristiaan van der Schoot

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