中国农业科学2025，Vol.58Issue(24)：5259-5273,15.DOI:10.3864/j.issn.0578-1752.2025.24.012
水分状态对连阴雨天气采收柑橘果实贮藏性能的影响
Effect of Water Status on the Storability of Citrus Fruits Harvested Under Continuous Rainy Weather
摘要
Abstract
[Objective]Continuous precipitation during the harvest season results in elevated decay incidence in citrus fruits,posing a critical challenge for postharvest management.This study aimed to decipher the underlying mechanisms by which continuous precipitation compromises fruit preservation,so as to provide a theoretical basis for developing economically storage protocols.[Method]Satsuma mandarin and Ponkan fruits were harvested under continuous precipitation during the harvest period,broad-spectrum disinfection as the control group,which subjected to three treatments:(1)industry-standard preservative cocktail(50 mg·L-1 chlorofluoropyridine acetic acid+10 mg·L-1 prochlorpene+100 mg·L-1beclomethasone)(BX);(2)heat treatment(2 hours 40℃)(HT),and(3)Synergistic treatment combining BX and HT(BH).Fruits were stored under ambient conditions,with decay rates recorded weekly.Additional fruit quality parameters were also measured,including weight loss,pericarp moisture content,enzymatic activities and total phenolic/flavonoid levels.Parallel experiments were conducted on Fortunella hindsii Swingle fruits,utilizing low-field nuclear magnetic resonance(LF-NMR)to quantify bound/free water ratios.Moreover,primary metabolite profiles of the samples during storage were detected by GC-MS.[Result]The BH treatment stabilized pericarp moisture at(75.51±1.00)%,significantly mitigating water loss relative to controls.Decay rates declined by(15.24±5.35)and 4.58 percentage points of BH-treated Satsuma mandarin and Ponkan,respectively.Moreover,BH-treated fruits exhibited elevated SOD and POD activities,maintaining phenolic/flavonoid accumulation and enhancing oxidative stress resistance.BH-treated fruit exhibited elevated SOD/POD activities,sustaining phenolic/flavonoid accumulation and enhancing oxidative stress resistance.In Fortunella hindsiii Swingle,BH reduced decay by 15.56 percentage points at day 35,with total moisture content at 69.80%(2.58%higher than controls).Furthermore,LF-NMR revealed BH promoted bound water(+2.00%)while reducing free water(-3.00%)after 28 days,inhibiting water phase migration and enhancing stability.Metabolite profiling confirmed BH-induced accumulation of resistance-related metabolites.[Conclusion]The synergistic treatment(BH)effectively maintained postharvest water homeostasis of citrus fruits harvested under continuous precipitation by increasing bound water ratios,activating ROS scavenging systems(via SOD/POD upregulation),and enhancing phenylpropanoid metabolism.Consequently,this dual regulatory mechanism of water status and metabolic networks significantly suppressed decay incidence.关键词
柑橘/采后保鲜/抗性/低场核磁/水分/热处理/初生代谢Key words
citrus/postharvest preservation/resistance/low-field nuclear magnetic resonance/water content/heat treatment/primary metabolism引用本文复制引用
QIN Lu,CHENG YunJiang,SHEN DanDan,JIANG XiaoLi,XIE HePing,AO YiJun,YANG Yang,ZHU Feng,XU RangWei,LIAO WenYue..水分状态对连阴雨天气采收柑橘果实贮藏性能的影响[J].中国农业科学,2025,58(24):5259-5273,15.基金项目
宜昌市科技研究与开发项目(A24-1-064) （A24-1-064）
