Thermal thresholds as predictors of seed dormancy release and germination timing: altitude-related risks from climate warming for the wild grapevine Vitis vinifera subsp. sylvestris

Martino Orrù; Efisio Mattana; Hugh W. Pritchard; Gianluigi Bacchetta

doi:10.1093/aob/mcs218

October 15, 2012Annals of Botany

Thermal thresholds as predictors of seed dormancy release and germination timing: altitude-related risks from climate warming for the wild grapevine Vitis vinifera subsp. sylvestris

View Full Paper

Ask AI

Bookmark

Share

Key Points

To determine the thermal thresholds regulating seed dormancy release and germination timing across an altitudinal gradient in wild grapevine under current and projected climate warming scenarios.
Tested germination of dried and fresh seeds from four Sardinian Vitis vinifera subsp. sylvestris populations across an altitudinal gradient (100–800 m a.s.l.) under temperatures of 10–25 °C and 25/10 °C following no treatment, warm stratification (3 months at 25 °C), or cold stratification (3 months at 5 °C).
Applied a thermal time approach to model germination responses and predicted emergence under current conditions and IPCC warming scenarios B1 (+1.8 °C) and A2 (+3.4 °C).
Cold stratification successfully broke physiological dormancy, resulting in >80% germination for fresh seeds at temperatures ≥20 °C, whereas untreated and warm-stratified seeds showed negligible germination.
Identified population-specific base temperatures for germination (Tb) between 9.0 °C and 11.3 °C and thermal time requirements (θ50) between 33.6 °Cd and 68.6 °Cd, predicting emergence from March to May under current climate conditions.
Projected warming under both IPCC scenarios showed an altitude-related threat, with lowland populations experiencing compromised dormancy release and substantially narrower germination windows.

No abstract yet

We only have this paper's title and publication details.

Read it at the source

Implication

Experimental modeling study reveals altitude-dependent germination vulnerabilities in wild grapevine, indicating heightened climate warming risks for lowland populations.

Discussion

No takes yet. Share an insight, caveat, or question.

Cite This Study

Orrù et al. (2012) studied this question.

synapsesocial.com/papers/6a9097f9e02ba012352dcd93 https://doi.org/10.1093/aob/mcs218

View Full Paper

Ask AI

Bookmark

Share

Thermal thresholds as predictors of seed dormancy release and germination timing: altitude-related risks from climate warming for the wild grapevine Vitis vinifera subsp. sylvestris

Key Points

No abstract yet

Implication

Discussion

Cite This Study

Thermal thresholds as predictors of seed dormancy release and germination timing: altitude-related risks from climate warming for the wild grapevine Vitis vinifera subsp. sylvestris

Key Points

No abstract yet

Implication

Discussion

Cite This Study

Keep reading

Keep reading