引起松木枯死的双倍体物种:发病率、树木学和生态参数的关系

IF 1.2 4区 农林科学 Q3 FORESTRY
S. Hlaiem, Islem Yangui, G. Della Rocca, S. Barberini, R. Danti, M. L. Ben Jamâa
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引用次数: 3

摘要

摘要:森林衰退是地中海盆地沿岸普遍存在的现象。病原真菌是引起林木病害的主要原因之一。Diplodia物种分布广泛,是包括松树在内的木本植物宿主的病原体。近年来,在突尼斯森林中的松树上观察到了梢枯、坏死、枝条枯萎、树冠透明和树干溃疡的症状。然而,北非,特别是突尼斯对这一问题的研究较少。本研究的目的是报告在突尼斯东北部和北部的两个森林中发生的导致P.pinea枯死的Diplodia物种。从有症状的松树枝条上采集了58个分离株。通过形态学特征和系统发育分析,鉴定出三种Diplodia物种:D.africana、D.pseudoseriata和D.scrobiculata。它们在P.pinea树上的发生率似乎与树木测量参数和生态因素显著相关。对3年生的松毛虫幼苗进行了致病性试验,证实了三种二倍体菌株的毒力。根据松树接种茎的木材中血管坏死的长度,scrobiculata是最具毒力的物种。本研究的数据提供了突尼斯首次报道与P.pinea枯死相关的Diplodia物种。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Diplodia Species Causing Dieback on Pinus Pinea: Relationship Between Disease Incidence, Dendrometric and Ecological Parameters
ABSTRACT Forest decline is a widespread phenomenon on coasts throughout the Mediterranean basin. Pathogenic fungi are amongst the main causes of forest tree diseases. Diplodia species, having a cosmopolitan distribution, are well-known as pathogens of woody plant hosts including Pinus spp. In recent years, symptoms of shoot dieback, necrosis, twig blight, canopy transparency and trunk cankers have been observed on Pinus pinea trees in Tunisian forests. Nevertheless, this has been less well-studied in North Africa and especially in Tunisia. The purpose of this study is to report the occurrence of Diplodia species causing dieback on P. pinea in two forests in northeastern and the northern Tunisia. A collection of fifty-eight isolates were obtained from symptomatic branches of P. pinea trees. Three Diplodia species were identified: D. africana, D. pseudoseriata and D. scrobiculata by means of morphological characteristics, and phylogenetic analysis. Their incidence on P. pinea trees appeared to be significantly correlated to the dendrometric parameters and ecological factors. A pathogenicity test was conducted on 3-years-old P. pinea seedlings, confirmed the virulence of three Diplodia species. Based on the length of vascular necrosis in the wood of the P. pinea inoculated stem, D. scrobiculata was the most virulent species. Data from the present study provide the first report of the species of Diplodia associated with P. pinea dieback in Tunisia.
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来源期刊
Journal of Sustainable Forestry
Journal of Sustainable Forestry Social Sciences-Geography, Planning and Development
CiteScore
3.90
自引率
12.50%
发文量
42
期刊介绍: Journal of Sustainable Forestry publishes peer-reviewed, original research on forest science. While the emphasis is on sustainable use of forest products and services, the journal covers a wide range of topics from the underlying biology and ecology of forests to the social, economic and policy aspects of forestry. Short communications and review papers that provide a clear theoretical, conceptual or methodological contribution to the existing literature are also included in the journal. Common topics covered in the Journal of Sustainable Forestry include: • Ecology, management, recreation, restoration and silvicultural systems of all forest types, including urban forests • All aspects of forest biology, including ecophysiology, entomology, pathology, genetics, tree breeding, and biotechnology • Wood properties, forest biomass, bioenergy, and carbon sequestration • Simulation modeling, inventory, quantitative methods, and remote sensing • Environmental pollution, fire and climate change impacts, and adaptation and mitigation in forests • Forest engineering, economics, human dimensions, natural resource policy, and planning Journal of Sustainable Forestry provides an international forum for dialogue between research scientists, forest managers, economists and policy and decision makers who share the common vision of the sustainable use of natural resources.
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