Parasporendocladia bactrospora associated with canker and dieback of walnut trees (Juglans regia L.) in Iran

Document Type : Original Article

Authors

1 Department of Plant Protection, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran.

2 Department of plant Protection, college of Agriculture, Shahid Bahonar university, Kerman, Iran

10.22043/MI.2023.361059.1246

Abstract

The walnut (Juglans regia L.) tree is considered one of the most important fruit trees in Iran. Decline disease of walnut trees is one of the significant problems that have been noticed in different regions of Kerman province (South-eastern Iran) during the last ten years. Therefore, a study was conducted to identify the fungal species associated with walnut trees showing trunk diseases between May 2015 and September 2016. Collected symptomatic wood samples were cut and surface disinfested with NaClO (Sodium hypochlorite) and then plated onto potato dextrose agar (PDA) plates. In this study, 21 isolates of a fungus were isolated from trees showing canker and dieback, and internal wood necrosis in the Bidkhun region of Kerman province. The obtained fungal isolates were first identified and grouped based on the most important morphological characteristics. Total genomic DNA was extracted and identification of the isolates was confirmed by sequence analysis of ITS (the internal transcribed spacer) using the primers ITS1 and ITS4. Based on the most important morphological characteristics and molecular data, these isolates were identified as Parasporendocladia bactrospora. This study is the first report of this species associated with canker and dieback symptoms on walnut trees worldwide and also the first report of this fungus for the funga of Iran.

Keywords


Abbasi KH, Abbasi S, Fotouhifar KHB. 2012.
Identification of Cytospora species from walnut
trees in Iran. Plant Protection (Scientific Journal of
Agriculture) 35: 59–69.
Abdollahzadeh J, Zare R, Phillips AJL. 2013.
Phylogeny and taxonomy of Botryosphaeria and
Neofusicoccum species in Iran, with description of
Botryosphaeria scharifii sp. nov. Mycologia 105:
210–220.
Barbosa FR, Maia LC, Gusmao FLP. 2009. Novos
registros de Hyphomycetes decompositores para o
Estado da Bahia, Brasil. Acta Botanica Brasilica
23: 323–329.
Barreto GG, Gusmão LFP, Dianese JC. 2022.
Checklist of ascomycetes recorded on eucalypts in
Brazil (1976-2022). Asian Journal of Mycology 5:
107–129.
Chen SF, Morgan DP, Hasey JK, Anderson K,
Michailides TJ. 2014. Phylogeny, morphology,
distribution, and pathogenicity of
Botryosphaeriaceae and Diaporthaceae from
English walnut in California. Plant Disease 98:
636–652.
Doyle JJ, Doyle JL. 1990. Isolation of plant DNA
from fresh tissue. Focus 12: 13–15.
Eichmeier A, Pecenka J, Necas T, Ondrasek I,
Armengol J, Leon M, Berlanas C, Gramaje D.
2020. Fungal trunk pathogens associated with
Juglans regia in the Czech Republic. Plant Disease
104: 761-771.
Fan X, Hyde KD, Liu M, Liang Y, Tian C. 2015.
Cytospora species associated with walnut canker
disease in China, with description of a new species
C. gigalocus. Fungal Biology 119: 310–319.
FAOSTAT 2021. Food and Agriculture Organization
of the United Nations.
http://www.fao.org/faostat/es/#dat
Felsenstein J. 1985. Confidence limits on
phylogenies: an approach using the bootstrap.
Evolution 39: 783–791.
Grünig CR, Sieber TN, Rogers SO, Holdenrieder O.
2002. Genetic variability among strains of
Phialocephala fortinii and phylogenetic analysis of
the genus Phialocephala based on rDNA ITS
sequence comparisons. Canadian Journal of
Botany 80: 1239–1249.
Gusella G, Giambra S, Conigliaro G, Burruano S,
Polizzi G. 2021. Botryosphaeriaceae species
causing canker and dieback of English walnut
(Juglans regia) in Italy. Forest Pathology
51:e12661.
Jacobs A, Coetzee MPA, Wingfield BD, Jacobs K,
Wingfield MJ. 2003. Phylogenetic relationships
among Phialocephala species and other
ascomycetes. Mycologia 95: 637–645.
Kendrick WB. 1961. The Leptographium complex.
Phialocephala gen. nov. Canadian Journal of
Botany 39: 1079–1085.
Kendrick WB. 1963. The Leptographium complex:
two new species of Phialocephala. Canadian
Journal of Botany 41: 1015–1023.
Kumar S, Stecher G, Li M, Knyaz Ch, Tamura K.
2018. MEGA X: Molecular evolutionary genetics
analysis across computing platforms. Molecular
Biology and Evolution 35: 1547–1549.
Lee DH, Seo ST, Lee SH, Lee SK, Lee SK. 2017.
Occurrence of Sporendocladia bactrospora on
Quercus variabilis in Korea. Korean Journal of
Mycology 45: 394–398.
Li GQ, Liu FF, Li JQ, Liu QL, Chen SF. 2016.
Characterization of Botryosphaeria dothidea and
Lasiodiplodia pseudotheobromae from English
walnut in China. Journal of Phytopathology 164:
348–353.
Luque J, Parlade J, Pera J. 2000. Pathogenicity of
fungi isolated from Quercus suber in Catalonia
(NE Spain). Forest Pathology 30: 247–263.
Meng L, Yu C, Li G. 2018. First report of Diaporthe
amygdali causing walnut twig canker in Shandong
province of China. Plant Disease 102: 1859.
Michailides TJ, Chen SF, Coates B, Morgan D,
Puckett R, Hasey J, Anderson K, Buchner R,
DeBuse C, Fichtner E, Bentley W. 2012.
Managing anthracnose blight and Botryosphaeria
and Phomopsis cankers of walnut. Part1:
Botryosphaeria and Phomopsis of walnut. In
Walnut Research Reports (pp. 367–388).
California Walnut Board.
Mohammadi H, Ezati Gh, Alaei H. 2013. Diplodia
seriata and Phaeoacremonium species associated
with walnut trees showing dieback symptoms in
Ardabil province. 1st Iranian Mycological
Congress, Rasht, Iran, 102p.
Rana JC, Singh D, Yadav SK, Verma MK, Kumar K,
Predheep K. 2007. Genetic diversity collected and
observed in Persian walnut (Juglas regia L.) in thewestern himalayan region of India. Plant Genetic
Resources 151: 68–73.
Raoufi F, Banihashemi Z, Mirtalebi M. 2016. First
report of walnut canker caused by Cryptosphaeria
pullmanensis in Iran. 22nd Iran Plant Protection
Congress, 27–30 August.
Roux J, Solheim H, Kamgan N, kuekam G, Wingfield
MJ. 2014. Sporendocladia bactrospora associated
with wounds on native broadleaved trees in
Norway and Sweden. Forest Pathology 44: 124–
130.
Sohrabi M, Mohammadi H, León M, Armengol J,
Banihashemi Z. 2020. Fungal pathogens associated
with branch and trunk cankers of nut crops in Iran.
European Journal of Plant Pathology 157: 327–
351.
Sohrabi M, Mohammadi H. 2020. First report of
Graphium carbonarium associated with walnut
dieback in Iran. Mycologia Iranica 7: 15–19.
Spies CFJ, Moyo P, Halleen F, Mostert L. 2018.
Phaeoacremonium species diversity on woody
hosts in the Western Cape province of South
Africa. Persoonia 40: 26–62.
Thompson JD, Higgins DG, Gibson TJ. 1994.
Clustral W: improving the sensitivity of
progressive multiple sequence alignment through
sequence weighting, position-specific gap penalties
and weight matrix choice. Nucleic Acids Research
22: 4673–4680.
White TJ, Bruns T, Lee S, Taylor J. 1990.
Amplification and direct sequencing of fungal
ribosomal RNA genes for phylogenetics. In: "PCR
protocols, a guide to methods and applications".
Innis MA, Gelfand DH, Sninsky JJ, White TJ.
(Eds.). Academic Press, San Diego, CA, USA, p.
315–322.
Wingfield MJ, van Wyk PS, Wingfield BD. 1987.
Reclassification of Phialocephala based on
conidial development. Transactions of the British
Mycological Society 89: 509–520.
Wu W, Diao Y. 2022. Anamorphic
Chaetosphaeriaceous Fungi from China. Fungal
Diversity116: 1–546.
Zhao SF, Guo KF, Yiming A. 2018. First report of
Cytospora nivea causing Cytospora canker on
walnut (Juglans regia L.) in the Tianshan
mountains region of Xinjiang, China. Plant
Disease 102: 2640.