Assessing the influence of autumnal temperature fluctuations on cold hardiness in different grapevine cultivars: variations across vine age and bud positions.

Our results also indicated a significant trend wherein older vines across all studied cultivars displayed enhanced cold hardiness, particularly pronounced at the critical LT 50 and the critical temperature at which 90% of the dormant buds were lethally affected by cold (LT 90 ) thresholds, in comparison to younger vines.

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