Tagged: deacclimation

Deacclimation kinetics of Vitis species

Deacclimation kinetics as a quantitative phenotype for delineating the dormancy transition and thermal efficiency for budbreak in Vitis species

Perennial plants use bud dormancy as a strategy to survive stressful environments, such as cold temperatures during winter. This strategy is dependent on the ability of the dormant bud to track the length of winter, avoiding early spring budbreak. With sufficient exposure to low, non-freezing temperatures (chilling requirement), grapevine buds transition between early (endodormant) and late winter (ecodormant) states. In a recent study published in AoBP, Kovaleski et al. aimed to uncover the relationship between fulfilment of the chilling requirement and the effects of various temperatures on loss of cold hardiness (deacclimation). The relationship between chilling requirement and temperature as it...

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Aloina ambigua

Embryonic moss sporophytes can be hardened to desiccation tolerance

Embryos of the moss Aloina ambigua are inducibly desiccation tolerant (DT), requiring a slow-dry period to confer tolerance to air-dryness. Hardening to DT describes a condition of temporary tolerance to a rapid-dry event (<30 min from full turgor to air-dryness) that is conferred by a prior slow-dry event. Brinda et al. found for the first time that moss embryos can indeed be hardened to DT, by first slowly drying embryos and equilibrating them at 50 % relative humidity, then rehydrating the embryos and exposing them to a rapid dry event at intervals of 24 h. The degree of hardening to...

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