A new host record of Alternaria argyroxiphii on Upland cotton (Gossypium hirsutum)

IF 2.5 2区农林科学 Q1 AGRONOMY Crop Protection Pub Date : 2024-08-22 DOI:10.1016/j.cropro.2024.106907

引用次数: 0

Abstract

For the first time, we isolated and identified Alternaria argyroxiphii on Upland cotton (Gossypium hirsutum) in Australia and elsewhere. A single-spored A. argyroxiphii isolate was obtained from diseased cotton leaves that exhibited small circular to enlarged and coalesced irregular necroses in the 2021–2022 cropping season in northwest New South Wales, Australia. We identified A. argyroxiphii based on its large conidia with filiform beaks and sequences of the internal transcribed spacer (ITS), glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and calmodulin (CAL). These multigene sequences of the cotton-A. argyroxiphii were 100% identical to those of the type A. argyroxiphii isolate CBS 117222; thus, confirming the identity. On two-true-leaf cotton seedlings, A. argyroxiphii was able to incite necrotic symptoms resembling those observed in the field, and was reisolated and re-identified, thus, fulfilling Koch's postulates. This is the first record of A. argyroxiphii on Upland cotton.

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陆地棉（Gossypium hirsutum）上 Alternaria argyroxiphii 的新寄主记录

我们首次分离并鉴定了澳大利亚和其他地区陆地棉（Gossypium hirsutum）上的Alternaria argyroxiphii。在澳大利亚新南威尔士州西北部的 2021-2022 年种植季节，棉花病叶上出现了从小圆点到扩大、凝聚的不规则坏死点，我们从这些坏死点中分离到了单孢 A. argyroxiphii。我们根据其具有丝状喙的大型分生孢子以及内部转录间隔（ITS）、甘油醛-3-磷酸脱氢酶（GAPDH）和钙调蛋白（CAL）的序列对 argyroxiphii 进行了鉴定。棉花 A. argyroxiphii 的这些多基因序列与 A. argyroxiphii 型分离物 CBS 117222 的序列 100%相同，从而证实了两者的同一性。在两片真叶的棉花幼苗上，A. argyroxiphii 能够引发与田间观察到的症状相似的坏死症状，并被重新分离和鉴定，从而满足了科赫假设。这是 A. argyroxiphii 在陆地棉上的首次记录。

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来源期刊

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.