Strawberry plants are at risk of exposure to short-term high daytime temperature (HT_D) during flowering and exposure to short-term low temperature at night (LT_N) during the coldest months of winter. The aim of this study was to identify the effects of short-term HT_D or LT_N on the different floral developments and fruit development, such as fruit malformation, flowering traits, stigma maturation, and pollen quality in ‘Seolhyang’ and ‘Maehyang’ strawberries. For the treatment of HT_D, plants were treated at 35 °C, and for LT_N treatment, plants were treated at 2 °C for consecutive days each. Days to flowering were shortened under HT_D in both cultivars, while days to anther dehiscence were shortened under HT_D. Stigma maturation was delayed by short-term extreme temperature stress in ‘Maehyang’. Short-term LT_N before the flower petals appeared in the first and second flower clusters might cause high malformation rates in both cultivars. Pollen viability and the germination rate were decreased by HT_D and LT_N in both cultivars. There was a high correlation between the lower pollen germination rate and the higher percentage of malformed fruits under short-term LT_N. These results suggest that even short-term exposure to low temperature in winter during cultivation should be controlled carefully considering developmental stages and cultivar-specific responses and that attention should be paid to the protection of strawberries.

草莓植株在开花期间有暴露于白天短期高温 (HT _D ) 的风险，在冬季最冷的月份则有暴露于夜间短期低温 (LT _N ) 的风险。本研究的目的是确定短期 HT _D或 LT _N对 'Seolhyang' 和 'Maehyang' 不同花发育和果实发育的影响，例如果实畸形、开花性状、柱头成熟和花粉质量草莓。对于 HT _D的处理，植物在 35°C 下处理，对于 LT _N处理，植物在 2°C 下连续处理各天。HT _D下开花天数缩短在两个品种中，HT _D下花药开裂的天数缩短了。'Maehyang' 的短期极端温度胁迫延迟了柱头成熟。在第一个和第二个花簇中花瓣出现之前的短期 LT _N可能导致两个品种的高畸形率。HT _D和LT _N降低了两个品种的花粉活力和发芽率。短期长期_氮肥下，较低的花粉萌发率与较高的畸形果实百分比之间存在高度相关性. 这些结果表明，考虑到草莓的发育阶段和品种特异性反应，即使在冬季短期暴露于低温下，也应谨慎控制，并应注意保护草莓。