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园艺学报 ›› 2026, Vol. 53 ›› Issue (5): 1425-1438.doi: 10.16420/j.issn.0513-353x.2025-0261

• 栽培·生理生化 • 上一篇    下一篇

几丁质诱导对采后甜樱桃抗黑斑病及贮藏品质的影响

崔建潮1, 贾晓辉2, 李立涛1, 范丽颖1, 赵文诗1, 陈龙1, 王旭敏1, 贺丽敏1,*(), 徐海娇1,2,*()   

  1. 1 河北省农林科学院昌黎果树研究所, 河北昌黎 066600
    2 中国农业科学院果树研究所农业农村部园艺作物种质资源利用重点实验室, 辽宁兴城 125100
  • 收稿日期:2025-12-10 修回日期:2026-02-12 出版日期:2026-05-25 发布日期:2026-05-26
  • 通讯作者:
    * E-mail:
  • 基金资助:
    河北省农林科学院科技创新人才队伍建设项目(C24R0601); 农业农村部园艺作物种质资源利用重点实验室基金项目(NYZS202403); 现代农业产业技术体系建设专项资助(CARS-30-ZY-27)

Effect of Chitin Induction on Postharvest Sweet Cherry Fruit Against Black Spot and Storage Quality

CUI Jianchao1, JIA Xiaohui2, LI Litao1, FAN Liying1, ZHAO Wenshi1, CHEN Long1, WANG Xumin1, HE Limin1,*(), XU Haijiao1,2,*()   

  1. 1 Changli Institute of PomologyHebei Academy of Agricultural and Forestry Sciences,Changli, Hebei 066600, China
    2 Research Institute of PomologyChinese Academy of Agricultural Sciences,Key Laboratory of Horticultural Crops Germplasm Resources Utilization,Ministry of Agriculture and Rural Affairs of the People’s Republic of China,Xingcheng, Liaoning 125100, China

摘要:

研究了离体条件下不同浓度几丁质对甜樱桃黑斑病病原菌链格孢菌(Alternaria alternata)菌丝生长和孢子萌发的影响,并以‘砂蜜豆’甜樱桃果实为试材,用几丁质处理后接种A. alternata孢悬液,探究几丁质诱导甜樱桃果实抗黑斑病的效应和机理。结果表明,低浓度几丁质对菌落直径(浓度为0 ~ 0.01%)和孢子萌发(浓度为0 ~ 0.001%)无明显影响。活体试验结果表明,0.01% ~ 1%几丁质均可显著抑制甜樱桃果实黑斑病扩展,且0.5%和1%为最适浓度,最佳诱导时间为24 h;几丁质处理对低温贮藏期间黑斑病也有较好控制效果,并可有效控制甜樱桃采后自然腐烂,且对贮藏品质无不良影响;几丁质处理增强了防御酶基因(PaCATPaSODPaPODPaPPO)以及水杨酸(SA)/茉莉酸(JA)信号通路关键基因(PaNPR1-likePaOPR3)的上调表达,相应地提高了果实超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)、多酚氧化酶(PPO)、几丁质酶(CHI)和β-1,3-葡聚糖酶(GLU)等防御酶活性。几丁质诱导甜樱桃果实对黑斑病的抗性与其防御酶活性和相对应基因表达增强有关。

关键词: 甜樱桃, 采后, 几丁质, 黑斑病, 诱导抗性, 贮藏品质

Abstract:

The effects of different concentrations of chitin on the mycelia growth and spore germination of Alternaria alternata,the causal agent of black spot disease in sweet cherry,were investigated under in vitro conditions. Meanwhile,‘Shamidou’sweet cherry fruits were used as experimental material and treatment with chitin,then A.alternata spore suspension were inoculated,which to explore the efficacy and mechanism of chitin-induced resistance against black spot disease. The results showed that low concentrations of chitin(0-0.01% for colony diameter and 0-0.001% for spore germination)had no significant inhibitory effect on A. alternata. In vivo experiments demonstrated that chitin at concentrations ranging from 0.01% to 1% significantly suppressed the expansion of black spot on sweet cherry fruit,with 0.5% and 1% identified as the optimal concentrations and 24 h as the most effective induction time. Chitin treatment also effectively controlled black spot disease during low-temperature storage,reduced natural decay in postharvest sweet cherry,and had no adverse effects on fruit quality. Furthermore,chitin treatment enhanced the up-regulated expression of defense-related enzyme genes(PaCATPaSODPaPODPaPPO)as well as SA/JA signaling pathway genes,such as PaNPR1-like and PaOPR3. Correspondingly, the activities of defense-related enzymes, including superoxide dismutase(SOD), catalase(CAT), peroxidase(POD), polyphenol oxidase(PPO),chitinase(CHI)and β-1,3-glucanase(GLU),were increased in fruit. Therefore,chitin-induced resistance against black spot disease in sweet cherry fruit is associated with enhanced activities of defense-related enzymes and up-regulation of their corresponding genes.

Key words: sweet cherry, postharvest, chitin, black spot disease, induced resistance, storage quality