Fate of mycelial and conidial propagules of Ilyonectria and Dactylonectria species in soil

Q3 Agricultural and Biological Sciences

New Zealand Plant Protection Pub Date : 2019-07-26 DOI:10.30843/NZPP.2019.72.244

C. Probst, Dudley Crabbe, H. Ridgway, M. Jaspers, E. Jones

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引用次数: 1

Abstract

Black foot disease of grapevines causes significant economic loss to the viticulture industry worldwide. A novel method was developed to investigate the fate of propagules of three species associated with black foot disease in New Zealand, Dactylonectria macrodidyma, Ilyonectria europaea and I. liriodendri, in soil. Conidia or mycelium of one isolate each of the three species were buried in soil in nylon mesh bags, and conidia/chlamydospore numbers were determined microscopically after 2 and 3 weeks. Conidia and chlamydospores were produced by mycelial inocula of all isolates, with greater numbers of chlamydospores after 3 weeks. Conidial inocula of all isolates also produced chlamydospores. Chlamydospores were formed at either the terminus or side of a hypha, and single and multiple conidia formed chlamydospores by combining their cellular protoplasm. Chlamydospores were produced from conidia, and conidia from mycelium faster for the I. europaea isolate than the D. macrodidyma and I. liriodendri isolates. The rapid formation of chlamydospores as survival propagules will facilitate the ability of these pathogens to persist in soil in the absence of a host.

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土壤中伊氏菌和达克氏菌菌丝和分生孢子繁殖体的命运

葡萄黑足病给全球葡萄种植业造成了巨大的经济损失。建立了一种研究新西兰黑足病相关物种Dactylonectria macrodidyma、Ilyonectria europaea和I. liriodendri繁殖体在土壤中的命运的新方法。将3个菌种各分离1株分生孢子或菌丝埋在尼龙网袋中，于2周和3周后显微镜下测定分生孢子/衣孢子数。菌丝接种均能产生分生孢子和衣原体孢子，接种3周后衣原体孢子数量增多。所有菌株的分生孢子接种均产生衣原体孢子。衣孢子形成于菌丝的端部或侧部，单个和多个分生孢子结合细胞质形成衣孢子。衣孢子由分生孢子产生，且从菌丝体产生分生孢子的速度较快。衣孢子作为生存繁殖体的快速形成将促进这些病原体在没有宿主的情况下在土壤中持续存在的能力。

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来源期刊

New Zealand Plant Protection Agricultural and Biological Sciences-Insect Science

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： New Zealand Plant Protection is the journal of the New Zealand Plant Protection Society. It publishes original research papers on all aspects of biology, ecology and control of weeds, vertebrate and invertebrate pests, and pathogens and beneficial micro-organisms in agriculture, horticulture, forestry and natural ecosystems of relevance to New Zealand.