【摘要】 本研究探讨杏树发芽过程中对低温积累的需求，分析全球变暖导致的暖冬现象对杏产量的影响。以中国南方优质杏品种‘海棠红’及其芽变变种‘早艳’为研究对象，通过4℃处理550 h的转录组学分析，鉴定出3124个差异表达基因(DEGs)，其中多与植物激素和蛋白质去磷酸化有关。通过观察低温处理下2个品种的枝条颜色发现，对低温需求量越低，品种耐寒性越强。研究表明，‘早艳’相较于‘海棠红’具有更低的低温需求，2个品种对低温需求量的差异可能与植物激素水平、转录后修饰有关。同时，2个品种表现出的可变剪切差异也可能与它们需冷量之间的差异有关。研究结果可为缓解气候变暖对杏产量的影响提供参考。更多还原

【Abstract】 This study explores the demand for low temperature accumulation during the germination process of apricot trees and analyzes the impact of warm winter phenomena caused by global warming on apricot yield. In this study, using the high-quality apricot variety‘Haitanghong’and its bud variant‘Zaoyan’from southern China as experimental materials, through transcriptomic analysis of 550 hours of treatment at 4℃, 3124differentially expressed genes(DEGs) were identified, and many were associated with plant hormones and protein dephosphorylation. By observing the branch color of the two varieties under low-temperature treatments, we found that the cultivar with the lower chilling requirement was more tolerant to cold. These results suggest that compared to‘Haitanghong’,‘Zaoyan’has a lower low-temperature requirement, and the difference in chilling requirements between the two varieties may be related to plant hormones and posttranscriptional modification. And the reason for these differences of alternative splicing may be associated with the varied chilling requirement in the two cultivars. These results can provide a reference for mitigating the decrease of apricot yield under climate warming.更多还原