The development of foliar fungal communities of nursery-grown Pinus sylvestris seedlings

IF 1.8 3区 农林科学 Q2 FORESTRY Scandinavian Journal of Forest Research Pub Date : 2023-11-02 DOI:10.1080/02827581.2023.2277745
Rebecca Larsson, Audrius Menkis, Oskar Skogström, Carin Espes, Eva-Karin Brogren-Mohlin, Martin Larsson, Åke Olson
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Abstract

In forest nurseries, foliar fungi play a key role in the health of tree seedlings. The aim of this study was to study the diversity and the development of foliar fungal species associated with nursery-grown Pinus sylvestris, and to evaluate the effect of two biological control products and two growth-stimulating products on seedling growth and disease control, as well as seedling associated fungal community. The study was conducted at four Swedish forest nurseries. Fungal communities were assessed from non-symptomatic needles using high-throughput sequencing of the ITS2 rRNA region. The fungal pathogens Cladosporium sp. (15.1%), Phoma herbarum (14.5%), and Alternaria alternata (5.5%) were among the most abundant fungi. Results showed that the nurseries and the development of fungal communities influenced the occurrence of dominant fungal taxa. Disease prevalence was low and microbial treatments had no significant impact on seedling growth and survival, nor on the number of fungal operational taxonomic units (OTUs), species diversity, and species evenness (p > 0.05). In conclusion, the results showed a dynamic change in foliar fungal community structure over the growing season. With appropriate nursery management strategies and under suitable climatic conditions, nursery seedlings can remain healthy even in the presence of fungal pathogens.
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苗木小松叶片真菌群落的发育
在森林苗圃中,叶面真菌对树木幼苗的健康起着关键作用。本研究旨在研究苗木西尔维斯松叶面真菌种类的多样性和发育情况,评价两种生物防治产品和两种促生产品对苗木生长和病害的防治效果以及苗木真菌群落的影响。这项研究是在四个瑞典森林苗圃进行的。使用ITS2 rRNA区域的高通量测序对无症状针头的真菌群落进行评估。真菌致病菌枝孢霉(Cladosporium sp.)(15.1%)、草本真菌(Phoma herbarum)(14.5%)和互花霉(Alternaria alternata)(5.5%)数量最多。结果表明,苗圃和真菌群落的发育对优势真菌类群的发生有影响。病害患病率低,微生物处理对幼苗生长和存活无显著影响,对真菌操作分类单位(OTUs)数量、物种多样性和物种均匀性无显著影响(p < 0.05)。综上所述,不同生长季节叶片真菌群落结构呈动态变化。通过适当的苗圃管理策略和适宜的气候条件,苗圃幼苗即使在真菌病原体存在的情况下也能保持健康。
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来源期刊
CiteScore
3.00
自引率
5.60%
发文量
26
审稿时长
3.3 months
期刊介绍: The Scandinavian Journal of Forest Research is a leading international research journal with a focus on forests and forestry in boreal and temperate regions worldwide.
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