pH range and substrate organic matter levels modulate the sporulation of Fusarium oxysporum f. sp. passiflorae under controlled conditions

IF 1.7 3区农林科学 Q2 AGRONOMY European Journal of Plant Pathology Pub Date : 2024-03-14 DOI:10.1007/s10658-024-02846-9

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Abstract

Fusarium wilt, caused by Fusarium oxysporum f. sp. passiflorae (FOP), stands out as an obstacle to the production of Passiflora edulis Sims. Little is known about the interaction of FOP with substrates and pH ranges that can be used in the development of management strategies or selection for resistance in Passiflora spp. Thus, the effect of different soil: manure or soil: coconut fiber ratios with pH ranging from acidic to alkaline on the production of FOP propagules was evaluated. The experiment was carried out in a completely randomized design, using four soil: manure or soil: coconut fiber ratios (5:0, 5:2, 5:4, 5:6 (v:v)). Each mixture’s pH was adjusted from 4.2 to 8.0 (soil: manure) or 4.2 to 9.7 (soil: coconut fiber). The production of microconidia, macroconidia, chlamydospores and colony forming units was evaluated at 3, 7, 14, 21 and 28 days after substrate infestation. The greatest number of propagules was registered in the groups treated with the highest proportions of manure or coconut fiber. The use of manure, regardless of the pH range, provided increases of 98%, 48%, and 13% in the number of colony forming units, microconidia and chlamydospores, respectively, in relation to the spores produced in substrates using coconut fiber. However, the production of macroconidia was 66% higher when fiber was used. Chlamydospore production was not affected by substrate pH, unlike other propagules with greater activity at slightly acidic, neutral or alkaline pH. The use of soil plus cattle manure in the ratios 5:4 or 5:6 with a pH between 5.1 and 8.0 was associated with the highest production of FOP propagules.

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在受控条件下，pH 值范围和基质有机物水平可调节 Fusarium oxysporum f. sp. Passiflorae 的孢子繁殖

摘要由 Fusarium oxysporum f. sp. Passiflorae（FOP）引起的镰刀菌枯萎病是西番莲生产的一个突出障碍。人们对 FOP 与基质和 pH 值范围的相互作用知之甚少，而这些基质和 pH 值范围可用于制定管理策略或选择西番莲属植物的抗性。因此，我们评估了 pH 值从酸性到碱性的不同土壤：粪肥或土壤：椰子纤维比例对 FOP 繁殖的影响。实验采用完全随机设计，使用了四种土壤：粪肥或土壤：椰子纤维的比例（5:0、5:2、5:4、5:6（v:v））。每种混合物的 pH 值调节范围为 4.2 至 8.0（土壤：粪便）或 4.2 至 9.7（土壤：椰子纤维）。在基质侵染后的 3、7、14、21 和 28 天，对微孢子囊、大孢子囊、衣壳孢子和菌落形成单位的产量进行了评估。在粪肥或椰子纤维比例最高的处理组中，繁殖体数量最多。与使用椰子纤维的基质中产生的孢子相比，使用粪便（无论 pH 值范围如何）可使菌落形成单位、微子囊菌和衣壳孢子的数量分别增加 98%、48% 和 13%。不过，使用纤维时，大锥体的产量要高出 66%。衣原体孢子的产生不受基质 pH 值的影响，不像其他繁殖体在 pH 值微酸、中性或碱性时活性更高。土壤和牛粪的比例为 5:4 或 5:6，pH 值介于 5.1 和 8.0 之间时，FOP 繁殖体的产量最高。

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来源期刊

European Journal of Plant Pathology 农林科学-农艺学

CiteScore

4.20

自引率

5.60%

发文量

183

审稿时长

3 months

期刊介绍： The European Journal of Plant Pathology is an international journal publishing original articles in English dealing with fundamental and applied aspects of plant pathology; considering disease in agricultural and horticultural crops, forestry, and in natural plant populations. The types of articles published are :Original Research at the molecular, physiological, whole-plant and population levels; Mini-reviews on topics which are timely and of global rather than national or regional significance; Short Communications for important research findings that can be presented in an abbreviated format; and Letters-to-the-Editor, where these raise issues related to articles previously published in the journal. Submissions relating to disease vector biology and integrated crop protection are welcome. However, routine screenings of plant protection products, varietal trials for disease resistance, and biological control agents are not published in the journal unless framed in the context of strategic approaches to disease management.