科特迪瓦芒果茎端腐烂病的流行情况及相关真菌病原体的鉴定

IF 2.5 3区 农林科学 Q2 Agricultural and Biological Sciences
Yefoungnigui Souleymane Yeo, Yassogui Kone, Dio Dramane Dembele, Elisee Ler-N’Ogn Dadee Georges Amari, Jean-Yves Rey, Emerson Medeiros Del Ponte, Diana Fernandez, Daouda Kone
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引用次数: 0

摘要

芒果(Mangifera indica L.)果实的采后茎端腐烂病(SER)是芒果生产的一个重大经济威胁。如果没有适当的管理策略,这种病害可导致高达 100% 的采后损失。尽管该病害十分重要,但科特迪瓦对其了解甚少。这项研究旨在确定芒果园中 SER 的发病率和严重程度,评估采收前气候参数对该病的影响,并确定与 SER 相关的病原真菌。对从本贾利、费尔凱塞杜古、科霍戈、奥迭内和西内马蒂亚利省的 15 个果园采集的 1500 个芒果果实进行了芒果 SER 评估。芒果 SER 的发病率为 10 % 至 30 %,严重程度为 5 % 至 20 %。这些参数在不同省份之间没有明显差异(P>0.05)。研究还发现,SER 病害发生率与平均气温(r = 0.36)和最低气温(r = 0.26)数据之间的相关性较低,表明采收前的天气条件可能对芒果采收后阶段的 SER 病害强度影响不大。利用形态学特征以及 rDNA 内部转录间隔区(ITS)和翻译伸长因子 1-α(tef1-α)的多焦点序列分析,对与 SER 相关的病原真菌进行了分离和鉴定。此外,还发现了与芒果 SER 病有关的各种真菌,其中 Lasiodiplodia 菌(74%)最普遍(包括 Lasiodiplodia theobromae、L. euphorbicola 和 L. caatinguensis),其次是 Colletotrichum gloeosporioides、Curvularia pseudobrachyspora、Diaporthe endophytica 和 Fusarium mangiferae。然而,只有 Lasiodiplodia 种类和 Diaporthe endophytica 能诱发 SER 症状。这项研究是科特迪瓦首次对芒果 SER 病害和相关真菌病原体的鉴定进行评估。这一结果将有助于研究人员开发芒果 SER 的防治方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Prevalence of mango stem-end rot disease in Côte d'Ivoire and identification of associated fungal pathogens

Prevalence of mango stem-end rot disease in Côte d'Ivoire and identification of associated fungal pathogens

The Stem-end rot (SER) postharvest disease of mango (Mangifera indica L.) fruits is a significant economic threat to mango production. Without proper management strategies, it can lead to up to 100 % postharvest losses. Despite its importance, very little information is known about this disease in Côte d'Ivoire. This research aimed to determine the incidence and severity of SER in mango orchards, assess how preharvest climate parameters affect the disease and determine the pathogenic fungi associated with SER. Mango SER was evaluated on 1500 mango fruits collected from 15 orchards in Boundiali, Ferkéssédougou, Korhogo, Odienné, and Sinématiali departments. Mango SER incidence ranged from 10 % to 30 %, while severity ranged from 5 % to 20 %. No significant differences in these parameters were observed between the different departments (P>0.05). The study also revealed a positive low correlation between SER disease incidence and mean air temperature (r = 0.36) and minimum air temperature (r = 0.26) data, indicating that preharvest weather conditions may have a marginal impact on mango SER disease intensity in the postharvest phase. Pathogenic fungi associated with SER were isolated and identified using morphological characteristics and multilocus sequence analysis of the rDNA internal transcribed spacer (ITS) region and the translation elongation factor 1-alpha (tef1-α). Various fungal species associated with mango SER disease were also identified, with Lasiodiplodia species (74%) being the most prevalent (including Lasiodiplodia theobromae, L. euphorbicola, and L. caatinguensis), followed by Colletotrichum gloeosporioides, Curvularia pseudobrachyspora, Diaporthe endophytica and Fusarium mangiferae. However, only Lasiodiplodia species and Diaporthe endophytica induced SER symptoms. This study was the first ever evaluation of mango SER disease and associated fungal pathogens identification in Côte d'Ivoire. This result will assist researchers in developing a control method for mango SER.

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来源期刊
Tropical Plant Pathology
Tropical Plant Pathology PLANT SCIENCES-
CiteScore
4.50
自引率
4.00%
发文量
61
审稿时长
6-12 weeks
期刊介绍: Tropical Plant Pathology is an international journal devoted to publishing a wide range of research on fundamental and applied aspects of plant diseases of concern to agricultural, forest and ornamental crops from tropical and subtropical environments.  Submissions must report original research that provides new insights into the etiology and epidemiology of plant disease as well as population biology of plant pathogens, host-pathogen interactions, physiological and molecular plant pathology, and strategies to promote crop protection. The journal considers for publication: original articles, short communications, reviews and letters to the editor. For more details please check the submission guidelines. Founded in 1976, the journal is the official publication of the Brazilian Phytopathology Society.
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