scholarly journals Characterization and Pathogenicity of Botryosphaeriaceae Species Isolated from Almond Trees on the Island of Mallorca (Spain)

Plant Disease ◽  
2016 ◽  
Vol 100 (12) ◽  
pp. 2483-2491 ◽  
Author(s):  
Diego Olmo ◽  
Josep Armengol ◽  
Maela León ◽  
David Gramaje
Keyword(s):  
Sequence Data ◽  
Elongation Factor ◽  
Nuclear Ribosomal Dna ◽  
Internal Transcribed Spacer Region ◽  
Dna Sequence Data ◽  
Almond Trees ◽  
Pathogenicity Tests ◽  
Almond Orchards ◽  
Elongation Factor 1 ◽  
Neofusicoccum Luteum

In this study, 31 almond orchards with trees showing severe decline symptoms were surveyed from 2009 to 2014 on the island of Mallorca (Spain). In all, 45 Botryosphaeriaceae isolates were collected and characterized based on phenotypical features and comparisons of DNA sequence data of the nuclear ribosomal DNA-internal transcribed spacer region and elongation factor 1-α gene. Five species were identified as Diplodia olivarum, D. seriata, Neofusicoccum luteum, N. mediterraneum, and N. parvum. Pathogenicity tests were performed on four cultivars (‘Pons’, ‘Vivot’, ‘Jordi’, and ‘Ferragnes’) under field conditions for two consecutive years (2013 to 2014), and confirmed that all five species cause canker and dieback of almond, with Neofusicoccum spp. more virulent than Diplodia spp. in both years. Jordi was less sensitive to fungal infection in 2013. First reports from almond in Spain include N. mediterraneum and N. luteum.

scholarly journals A Survey of Trunk Disease Pathogens within Citrus Trees in Iran

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 754
Author(s):  
Nahid Espargham ◽  
Hamid Mohammadi ◽  
David Gramaje
Keyword(s):  
Sequence Data ◽  
Fusarium Species ◽  
Elongation Factor ◽  
Morphological Characteristics ◽  
Nuclear Ribosomal Dna ◽  
Internal Transcribed Spacer Region ◽  
Lasiodiplodia Theobromae ◽  
Dna Sequence Data ◽  
Pathogenicity Tests ◽  
Citrus Trees

Citrus trees with cankers and dieback symptoms were observed in Bushehr (Bushehr province, Iran). Isolations were made from diseased cankers and branches. Recovered fungal isolates were identified using cultural and morphological characteristics, as well as comparisons of DNA sequence data of the nuclear ribosomal DNA-internal transcribed spacer region, translation elongation factor 1α, β-tubulin, and actin gene regions. Dothiorella viticola, Lasiodiplodia theobromae, Neoscytalidium hyalinum, Phaeoacremonium (P.) parasiticum, P. italicum, P. iranianum, P. rubrigenum, P. minimum, P. croatiense, P. fraxinopensylvanicum, Phaeoacremonium sp., Cadophora luteo-olivacea, Biscogniauxia (B.) mediterranea, Colletotrichum gloeosporioides, C. boninense, Peyronellaea (Pa.) pinodella, Stilbocrea (S.) walteri, and several isolates of Phoma, Pestalotiopsis, and Fusarium species were obtained from diseased trees. The pathogenicity tests were conducted by artificial inoculation of excised shoots of healthy acid lime trees (Citrus aurantifolia) under controlled conditions. Lasiodiplodia theobromae was the most virulent and caused the longest lesions within 40 days of inoculation. According to literature reviews, this is the first report of L. theobromae and N. hyalinum on citrus in Iran. Additionally, we report several Phaeoacremonium species, S. walteri, Pa. pinodella and C. luteo-olivacea on citrus trees for the first time in the world.

scholarly journals Characterization and Pathogenicity of Botryosphaeriaceae Species Collected from Olive and Other Hosts in Spain and California

2010 ◽  
Vol 100 (12) ◽  
pp. 1340-1351 ◽  
Author(s):  
Juan Moral ◽  
Concepción Muñoz-Díez ◽  
Nazaret González ◽  
Antonio Trapero ◽  
Themis J. Michailides
Keyword(s):  
Sequence Data ◽  
Close Association ◽  
Elongation Factor ◽  
Fruit Rot ◽  
Disease Symptoms ◽  
Dna Sequence Data ◽  
Olive Fly ◽  
The Family ◽  
Pathogenicity Tests ◽  
Olive Trees

Species in the family Botryosphaeriaceae are common pathogens causing fruit rot and dieback of many woody plants. In this study, 150 Botryosphaeriaceae isolates were collected from olive and other hosts in Spain and California. Representative isolates of each type were characterized based on morphological features and comparisons of DNA sequence data of three regions: internal transcribed spacer 5.8S, β-tubulin, and elongation factor. Three main species were identified as Neofusicoccum mediterraneum, causing dieback of branches of olive and pistachio; Diplodia seriata, causing decay of ripe fruit and dieback of olive branches; and Botryosphaeria dothidea, causing dalmatian disease on unripe olive fruit in Spain. Moreover, the sexual stage of this last species was also found attacking olive branches in California. In pathogenicity tests using unripe fruit and branches of olive, D. seriata isolates were the least aggressive on the fruit and branches while N. mediterraneum isolates were the most aggressive on both tissues. Isolates of B. dothidea which cause dalmatian disease on fruit were not pathogenic on branches and only weakly aggressive on fruit. These results, together with the close association between the presence of dalmatian disease symptoms and the wound created by the olive fly (Bactrocera oleae), suggest that the fly is essential for the initiation of the disease on fruit. Isolates recovered from dalmatian disease symptoms had an optimum of 26°C for mycelial growth and 30°C for conidial germination, suggesting that the pathogen is well adapted to high summer temperatures. In contrast, the range of water activity in the medium for growth of dalmatian isolates was 0.93 to 1 MPa, which was similar to that for the majority of fungi. This study resolved long-standing questions of identity and pathogenicity of species within the family Botryosphaeriaceae attacking olive trees in Spain and California.

scholarly journals Phylogeny, Distribution, and Pathogenicity of Lasiodiplodia Species Associated With Cankers and Dieback Symptoms of Persian Lime in Mexico

Plant Disease ◽  
2019 ◽  
Vol 103 (6) ◽  
pp. 1156-1165 ◽  
Author(s):  
M. A. Bautista-Cruz ◽  
G. Almaguer-Vargas ◽  
S. G. Leyva-Mir ◽  
M. T. Colinas-León ◽  
K. C. Correia ◽  
...  
Keyword(s):  
Sequence Data ◽  
Elongation Factor ◽  
Internal Transcribed Spacer Region ◽  
Translation Elongation ◽  
Dna Sequence Data ◽  
Tubulin Genes ◽  
Fungal Identification ◽  
Mycelial Plug ◽  
Inference Methods ◽  
Stem Cankers

Persian lime (Citrus latifolia Tan.) is an important and widely cultivated fruit crop in several regions of Mexico. In recent years, severe symptoms of gummosis, stem cankers, and dieback were detected in the Persian lime-producing region in the states of Veracruz and Puebla, Mexico. The aims of this study were to identify the species of Lasiodiplodia associated with these symptoms, determine the distribution of these species, and test their pathogenicity and virulence on Persian lime plants. In 2015, symptomatic samples were collected from 12 commercial Persian lime orchards, and 60 Lasiodiplodia isolates were obtained. Fungal identification of 32 representative isolates was performed using a phylogenetic analysis based on DNA sequence data of the internal transcribed spacer region and part of the translation elongation factor 1-α and β-tubulin genes. Sequence analyses were carried out using the Maximum Likelihood and Bayesian Inference methods. Six Lasiodiplodia species were identified as Lasiodiplodia pseudotheobromae, Lasiodiplodia theobromae, Lasiodiplodia brasiliense, Lasiodiplodia subglobosa, Lasiodiplodia citricola, and Lasiodiplodia iraniensis. All Lasiodiplodia species of this study are reported for the first time in association with Persian lime in Mexico and worldwide. L. pseudotheobromae (46.9% of isolates) was the most frequently isolated species followed by L. theobromae (28.1%) and L. brasiliense (12.5%). Pathogenicity on Persian lime young plants using a mycelial plug inoculation method showed that all identified Lasiodiplodia species were able to cause necrotic lesions and gummosis, but L. subglobosa, L. iraniensis, and L. pseudotheobromae were the most virulent.

scholarly journals Bambusicolous Arthrinium Species in Guangdong Province, China

2020 ◽  
Vol 11 ◽  
Author(s):  
Indunil C. Senanayake ◽  
Jayarama D. Bhat ◽  
Ratchadawan Cheewangkoon ◽  
Ning Xie
Keyword(s):  
Large Subunit ◽  
Elongation Factor ◽  
Morphological Characteristics ◽  
Guangdong Province ◽  
Nuclear Ribosomal Dna ◽  
Internal Transcribed Spacer Region ◽  
Translation Elongation ◽  
Bambusicolous Fungi ◽  
Elongation Factor 1 Alpha ◽  
Elongation Factor 1

A survey of bambusicolous fungi in Bijiashan Mountain Park, Shenzhen, Guangdong Province, China, revealed several Arthrinium-like taxa from dead sheaths, twigs, and clumps of Bambusa species. Phylogenetic relationships were investigated based on morphology and combined analyses of the internal transcribed spacer region (ITS), large subunit nuclear ribosomal DNA (LSU), beta tubulin (β-tubulin), and translation elongation factor 1-alpha (tef 1-α) gene sequences. Based on morphological characteristics and phylogenetic data, Arthrinium acutiapicum sp. nov. and Arthrinium pseudorasikravindrae sp. nov. are introduced herein with descriptions and illustrations. Additionally, two new locality records of Arthrinium bambusae and Arthrinium guizhouense are described and illustrated.

scholarly journals Phylogeny, Morphology, Distribution, and Pathogenicity of Botryosphaeriaceae and Diaporthaceae from English Walnut in California

Plant Disease ◽  
2014 ◽  
Vol 98 (5) ◽  
pp. 636-652 ◽  
Author(s):  
ShuaiFei Chen ◽  
David P. Morgan ◽  
Janine K. Hasey ◽  
Kathleen Anderson ◽  
Themis J. Michailides
Keyword(s):  
Sequence Data ◽  
Juglans Regia ◽  
Elongation Factor ◽  
Stem Canker ◽  
Translation Elongation ◽  
Disease Symptoms ◽  
Neoscytalidium Dimidiatum ◽  
Dna Sequence Data ◽  
English Walnut ◽  
Elongation Factor 1

Species of family Botryosphaeriaceae and genus Diaporthe (anamorph: genus Phomopsis, family Diaporthaceae) were reported and caused diseases on various fruit and nut trees in California. In the last several years, diseases on English walnut (Juglans regia) caused by species of Botryosphaeriaceae and Diaporthe were observed frequently in California. Disease symptoms include stem canker; shoot canker and blight; twig, leaf, and fruit blight; and necrotic leaf lesions. Isolates of the pathogen were collected from English walnut in 13 counties in California. The aims of this study were to identify these isolates and to test their pathogenicity to English walnut cultivars. In total, 159 California isolates were identified based on comparisons of DNA sequence data of the internal transcribed spacer, translation elongation factor 1-α, and β-tubulin gene regions, and combined with the morphological features of the cultures and conidia. Research results revealed that isolates represent 10 species of Botryosphaeriaceae and two species of Diaporthe. These species include Botryosphaeria dothidea, Diplodia mutila, D. seriata, Dothiorella iberica, Lasiodiplodia citricola, Neofusicoccum mediterraneum, N. nonquaesitum, N. parvum, N. vitifusiforme, Neoscytalidium dimidiatum, Diaporthe neotheicola, and D. rhusicola. Pathogenicity on three English walnut cultivars (‘Chandler’, ‘Tulare’, and ‘Vina’) using a mycelium plug inoculation method revealed that all these species are pathogenic to all the tested cultivars, with L. citricola and N. parvum being the most pathogenic species, followed by N. mediterraneum, N. dimidiatum, and B. dothidea. Chandler was more tolerant to infection than Tulare and Vina. Results in this study determined that multiple numbers of the Botryosphaeriaceae fungi and two Diaporthe spp. cause cankers and blights of English walnut and vary in their virulence from highly to slightly virulent, respectively.

scholarly journals Cryptic species of Curvularia in the culture collection of the Queensland Plant Pathology Herbarium

MycoKeys ◽  
2018 ◽  
Vol 35 ◽  
pp. 1-25 ◽  
Author(s):  
Yu Pei Tan ◽  
Pedro W. Crous ◽  
Roger G. Shivas
Keyword(s):  
Plant Pathology ◽  
Dna Sequences ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Elongation Factor ◽  
Culture Collection ◽  
Internal Transcribed Spacer Region ◽  
Translation Elongation ◽  
Air Sample ◽  
Elongation Factor 1

Several unidentified specimens of Curvularia deposited in the Queensland Plant Pathology Herbarium were re-examined. Phylogenetic analyses based on sequence data of the internal transcribed spacer region, partial fragments of the glyceraldehyde-3-phosphate dehydrogenase and the translation elongation factor 1-α genes, supported the introduction of 13 novel Curvularia species. Eight of the species described, namely, C.beasleyi sp. nov., C.beerburrumensis sp. nov., C.eragrosticola sp. nov., C.kenpeggii sp. nov., C.mebaldsii sp. nov., C.petersonii sp. nov., C.platzii sp. nov. and C.warraberensis sp. nov., were isolated from grasses (Poaceae) exotic to Australia. Only two species, C.lamingtonensis sp. nov. and C.sporobolicola sp. nov., were described from native Australian grasses. Two species were described from hosts in other families, namely, C.coatesiae sp. nov. from Litchichinensis (Sapindaceae) and C.colbranii sp. nov. from Crinumzeylanicum (Amaryllidaceae). Curvulariareesii sp. nov. was described from an isolate obtained from an air sample. Furthermore, DNA sequences from ex-type cultures supported the generic placement of C.neoindica and the transfer of Drechsleraboeremae to Curvularia.

scholarly journals Occurrence and Diversity of Black-Foot Disease Fungi in Symptomless Grapevine Nursery Stock in Spain

Plant Disease ◽  
2020 ◽  
Vol 104 (1) ◽  
pp. 94-104 ◽  
Author(s):  
Carmen Berlanas ◽  
Sonia Ojeda ◽  
Beatriz López-Manzanares ◽  
Marcos Andrés-Sodupe ◽  
Rebeca Bujanda ◽  
...  
Keyword(s):  
Sequence Data ◽  
Elongation Factor ◽  
Fungal Species ◽  
Nuclear Ribosomal Dna ◽  
Northern Spain ◽  
Internal Transcribed Spacer Region ◽  
Tubulin Genes ◽  
Foot Disease ◽  
Black Foot ◽  
Black Foot Disease

In this study, 3,426 grafted grapevines ready to be planted from 15 grapevine nursery fields in Northern Spain were inspected from 2016 to 2018 for black-foot causing pathogens. In all, 1,427 isolates of black-foot pathogens were collected from the asymptomatic inner tissues of surface sterilized secondary roots and characterized based on morphological features and DNA sequence data of the nuclear ribosomal DNA-internal transcribed spacer region, histone H3, translation elongation factor 1-alpha and β-tubulin genes. Eleven species belonging to the genera Dactylonectria, Ilyonectria, Neonectria, and Thelonectria were identified, including Dactylonectria alcacerensis, D. macrodidyma, D. novozelandica, D. pauciseptata, D. torresensis, Ilyonectria liriodendri, I. pseudodestructans, I. robusta, Neonectria quercicola, Neonectria sp. 1, and Thelonectria olida. In addition, two species are newly described, namely D. riojana and I. vivaria. Twenty-four isolates representing 13 black-foot species were inoculated onto grapevine seedlings cultivar ‘Tempranillo’. The pathogenicity tests detected diversity in virulence among fungal species and between isolates within each species. The most virulent species was D. novozelandica isolate BV-0760, followed by D. alcacerensis isolate BV-1240 and I. vivaria sp. nov. isolate BV-2305. This study improves our knowledge on the etiology and virulence of black-foot disease pathogens, and opens up new perspectives in the study of the endophytic phase of these pathogens in grapevines.

scholarly journals Identification of the fungal endophyte of Ammophila breviligulata (American beachgrass) as Epichloë amarillans

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4300 ◽  
Author(s):  
Ian Drake ◽  
James F. White Jr ◽  
Faith C. Belanger
Keyword(s):  
Dna Sequences ◽  
Sequence Data ◽  
Elongation Factor ◽  
Morphological Characteristics ◽  
Fungal Endophyte ◽  
Translation Elongation ◽  
Ammophila Breviligulata ◽  
Dna Sequence Data ◽  
Elongation Factor 1 Alpha ◽  
Elongation Factor 1

The grass Ammophila breviligulata (American beachgrass) is known to host an endophyte of the genus Epichloë. Based on morphological characteristics it was originally identified as Acremonium typhinum var. ammophilae and is currently designated as Epichloë typhina var. ammophilae. However, the Epichloë species has not previously been identified based on DNA sequence data. Based on phylogenetic placement of beta-tubulin and translation elongation factor 1-alpha DNA sequences the endophyte is identified as a member of E. amarillans rather than E. typhina.

Three new species of Diaporthe from China based on morphological characters and DNA sequence data analyses

Phytotaxa ◽  
2019 ◽  
Vol 422 (2) ◽  
pp. 157-174 ◽  
Author(s):  
HAO ZHOU ◽  
CHENG-LIN HOU
Keyword(s):  
Sequence Data ◽  
Histone H3 ◽  
Elongation Factor ◽  
Morphological Characters ◽  
Translation Elongation Factor ◽  
Translation Elongation ◽  
Dna Sequence Data ◽  
Rdna Its ◽  
Three New Species ◽  
Elongation Factor 1

In the present study, nine endophytic strains of Diaporthe from China were identified based on analyses of morphological characters and combined sequences of rDNA ITS, partial sequences from the translation elongation factor 1-α (tef1), β tubulin (tub2), histone H3 (his3), and calmodulin (cal) genes. Three new Diaporthe species, Diaporthe anhuiensis, Diaporthe huangshanensis and Diaporthe shennongjiaensis, are introduced in this paper with full descriptions and comparison with similar taxa. And two other known species, Diaporthe citrichinensis and Diaporthe eres are also described.

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