Physiological and transcriptomic characterization of cold acclimation in endodormant grapevine under different temperature regimes

Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(6)

Published: Nov. 1, 2024

Abstract It is essential for the survival of grapevines in cool climate viticultural regions where vines properly acclimate late fall and early winter develop freezing tolerance. Climate change‐associated abnormities temperature during dormant season, including oscillations between prolonged warmth extreme cold midwinter, impact acclimation threaten sustainability grape wine industry. We conducted two experiments controlled environment to investigate impacts different regimes on ability endodormant grapevine buds through a combination tolerance‐based physiological RNA‐seq‐based transcriptomic monitoring. Results show that exposure constant temperature, whether warm (22 11°C), moderate (7°C), or (4 2°C) was insufficient triggering increasing tolerance buds. However, when same were exposed cycling (7±5°C), occurred, increased by 5°C. characterized response high low temperatures identified new potential roles ethylene pathway, starch sugar metabolism, phenylpropanoid regulation, protein metabolism genetic control endodormancy maintenance. Despite clear evidence temperature‐responsive transcription buds, our current understanding remains challenge generalizing across tissues phenological stages.

Language: Английский

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Trade‐off between spring phenological sensitivities to temperature and precipitation across species and space in alpine grasslands over the Qinghai–Tibetan Plateau

New Phytologist, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Elucidating climatic drivers of spring phenology in alpine grasslands is critical. However, current statistical estimates phenological sensitivities to temperature and precipitation (βT βP) might be biased their variability across sites species are not fully explained. We benchmarked species-level βT βP statistically inferred from historical records with observations a field manipulative experiment. then analyzed landscape scale estimated the best approach benchmark analysis 57 grassland Qinghai-Tibetan Plateau. Compared experiment results, process-agnostic regression-based approaches underestimate by 2.36-3.87 d °C-1 (54-88%) while process-based model fitting predicts comparable βP. Process-based negatively correlated (R = -0.94, P < 0.01) -0.45, 0.01). positively mean annual temperature, elevation at regional scale. Using can better estimate climate. The trade-off between contributes site-level variabilities grasslands, which needs incorporated predicting future changes.

Language: Английский

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Tetralone-ABA enhances winter cold acclimation, reduces deacclimation, and delays budbreak in V. vinifera and V. hybrid grapevines

Plant Stress, Journal Year: 2025, Volume and Issue: unknown, P. 100861 - 100861

Published: April 1, 2025

Language: Английский

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ABA-Insensitive 5 (ABI5) Is Involved in ABA-Induced Dormancy via Activating PavCIG1/2 Expression in Sweet Cherries

Genes, Journal Year: 2025, Volume and Issue: 16(5), P. 596 - 596

Published: May 18, 2025

Background/Objectives: In perennial plants, developing floral buds survive winter through entering a dormant state, which is induced by low temperature and abscisic acid (ABA). ABA performs vital functions in the dormancy process. ABA-insensitive 5 (ABI5) transcription factor key regulator signaling pathway. However, little known about regulation of ABI5 sweet cherries. Methods: We identified cherry gene its expression changes using cloning qRT-PCR. Additionally, we validated interaction between PavABI5 PavCIG1/2 Yeast One-Hybrid Dual-Luciferase Assays. Results: this study, basic leucine zipper (bZIP) family from cherry, was closely related to PduABI5 Prunus dulcis, PpABI5 persica, PmABI5 mume, ParABI5 armeniaca, phylogenetic tree analysis. The seasonal pattern showed that level increased during stage exogenous ABA. Specifically, found cold-induced genes (PavCIG1/2) positively correlated with expression. Furthermore, directly bound ABRE elements promoters activate their further confirmed dormancy-associated MADS-box (DAM) DAM4 DAM5 function downstream pathway regulate bud Conclusions: Our findings suggest putative regulatory model ABA-mediated bud-dormancy PavABI5.

Language: Английский

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