Chilling injury (CI) is a severe problem for peach fruit during cold storage. Application of 1-methylcyclopropylene (1-MCP) or methyl jasmonate (MeJA),can alleviate CI in melting flesh peach fruit. However, no information was available about 1-MCP or MeJA on chilling tolerance in stony hard peach fruit and their regulatory mechanisms. In this study, the effects of 10 μmol L⁻¹ 1-MCP or 10 μmol L⁻¹ MeJA treatment on CI development, sucrose metabolism, and energy metabolism in stony hard peach fruit cv. ‘Yingshuanghong’ (YSH) were investigated during cold storage. The results showed that 10 μmol L⁻¹ 1-MCP or MeJA significantly inhibited the CI index, while MeJA was more effective. Also, both 1-MCP and MeJA treatments had a noticeable impact on energy and sucrose metabolisms. However, 1-MCP treatment was more effective in maintaining a stable and high energy status during cold storage, which might be contributed to alleviating CI. In contrast, MeJA treatment was more effective in regulating sucrose metabolism via activating sucrose synthesis and suppressing sucrose degradation at both the enzymatic and the transcript levels, which might play a crucial role in MeJA-induced cold tolerance. In general, ‘the 1-MCP or MeJA-induced chilling tolerance in stony hard peach fruit cv. ‘YSH’ was attributed to the activation of sucrose and mitochondrial energy metabolisms.

冷害（CI）是桃果实在冷藏过程中的一个严重问题。应用1-甲基环丙烯(1-MCP)或茉莉酸甲酯(MeJA)可缓解桃肉融化时的CI。然而，没有关于 1-MCP 或 MeJA 关于石质硬桃果实耐寒性及其调控机制的信息。在本研究中，10 μmol L ^-1 1-MCP 或 10 μmol L ^-1 MeJA 处理对石质硬桃品种 CI 发育、蔗糖代谢和能量代谢的影响。'映双红'（YSH）在冷藏期间进行了调查。结果表明，10 μmol L ^-11-MCP或MeJA显着抑制CI指数，而MeJA更有效。此外，1-MCP 和 MeJA 处理对能量和蔗糖代谢都有显着影响。然而，1-MCP 处理在冷藏期间保持稳定和高能量状态更有效，这可能有助于缓解 CI。相比之下，MeJA 处理通过激活蔗糖合成和抑制酶和转录水平的蔗糖降解来更有效地调节蔗糖代谢，这可能在 MeJA 诱导的耐寒性中起关键作用。一般来说，1-MCP 或 MeJA 诱导的石质硬桃果实耐寒性。“YSH”归因于蔗糖和线粒体能量代谢的激活。