Volume 7 - Issue 1


Article Number 1
Title

Uromyces trifolii, a new addition to rust fungi of Himachal Pradesh, India, with a checklist of Uromyces in India

Authors

Gautam AK, Avasthi S

Received 17 February 2016
Accepted 04 November 2016
Published Online 24 January 2017
Corresponding Author A. K. Gautam
Abstract

Uromyces is a genus of rust fungi that infects both monocots and dicots throughout the world. The genus is particularly common on plant families like Asteraceae, Euphorbiaceae, Fabaceae, Liliaceae, Poaceae, and Loranthaceae. A rust infection was observed on leaves and stem of Trifolium repens from Himachal Pradesh, India. The symptoms appeared as dark brown to blackish brown pustules. Morphological and microscopic analyses of diseased samples identified it as Uromyces trifolii, which is new to Himachal Pradesh. Taxonomic descriptions and illustrations of the specimen are given. A checklist to assess diversity and distribution of the genus Uromyces in India is provided. 

Keywords checklist – Himachal Pradesh – new record – rust fungi – Trifolium repens
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Article Number 2
Title

Additions to the leaf pathogenic fungi of Turkey

Authors

Erdoğdu M, Suludere Z, Hüseyin E

Received 18 July 2016
Accepted 25 November 2016
Published Online 06 February 2017
Corresponding Author M. Erdoğdu
Abstract

Septoria ornithogali on living leaves of Ornithogalum sp. and Phyllosticta onosmae on living leaves of Onosma tauricum var. tauricum are reported as new to the mycota of Turkey. Distinguishing morphological characters are described and illustrated for each species.

Keywords microfungi – Phyllosticta onosmae – Septoria ornithogali
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Article Number 3
Title

New records of the genus Ramularia in Iran

Authors

Behrooz SY, Salari M, Pirnia M, Sabbagh SK

Received 24 April 2016
Accepted 16 January 2017
Published Online 20 February 2017
Corresponding Author M Pirnia
Abstract

Nine collections belonging to the plant pathogenic fungus genus Ramularia from different localities of Kohgiluyeh and Boyerahmad Province (SW Iran) were obtained during spring-autumn 2012–13. Eight species were identified: Ramularia anchusae on Anchusa azurea, R. armoraciae on Barbarea plantaginea, R. cupulariae on Inula sp., R. cynarae on Carthamus tinctorius, R. epilobiana on Epilobium hirsutum, R. grevilleana on Potentilla reptans, R. lamii on Mentha longifolia and Mentha sp. and R. simplex on Ranunculus acris. Ramularia armoraciae, R. cupulariae and R. epilobiana are new records to Iran while Mentha longifolia and Ranunculus acris are new hosts for R. lamii and R. simplex in Iran, respectively.

Keywords Mycosphaerellaceae – plant disease – Ramularia – taxonomy
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Article Number 4
Title

Prevalence, incidence and molecular characterization of Phomopsis vexans (Diaporthe vexans) causing leaf blight and fruit rot disease of brinjal in Karnataka (India)

Authors

Mahadevakumar S, Amruthavalli C, Sridhar KR, Janardhana GR

Received 20 November 2016
Accepted 21 January 2017
Published Online 07 March 2017
Corresponding Author G R Janardhana
Abstract

The distribution, prevalence and incidence of Phomopsis vexans in six major brinjal growing agro-climatic zones of southwest India is reported. P. vexans was isolated from diseased leaf and fruit samples from six zones and was studied for its morpho-cultural and molecular characteristics. Eighteen isolates were tested for their pathogenicity on 30-days old brinjal seedlings. The ITS regions of these fungal isolates were used for the molecular identification followed by phylogenetic analysis. The incidence of leaf blight and fruit rot disease was high in northern transition zone (NTZ: 10.6-25.3% and 21-33.3%) followed by southern dry zone (SDZ: 8.3-18% and 22.3-62%) and central dry zone (CDZ: 10-17% and 29-39%). All the isolates exhibited similarities in colony morphology. Variation was observed with regard to number of pycnidia, colony growth and type. Among the 24 isolates, 18 belonged to G-type and the rest could not be ascertained to either colony type. The 18 G-type isolates produced leaf blight and fruit rot symptoms 25-28 and 45-55 days post inoculation, respectively. In the phylogenetic analysis, all the 24 isolates formed a single clade, thus confirming their close genetic relatedness, though they were isolated from different agro-climatic zones of southwest India. Phylogenetic analysis of complete ITS2 sequence showed the presence of two distinct groups based on substitutions and indels observed among the populations where six isolates from NDZ and CDZ formed a distinct group from the rest of the isolates.

Keywords agro-ecological distributions – molecular phylogeny – pathogenicity – Phomopsis vexans – Solanum melongena
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Article Number 5
Title

First appearance of smut disease on woodland tulip, Tulipa sylvestris, in Iran

Authors

Arzanlou M, Narmani A

Received 29 May 2016
Accepted 24 December 2016
Published Online 11 March 2017
Corresponding Author M. Arzanlou
Abstract

Tulips (Tulipa spp.) are popular species of bulbous plant belonging to the family Liliaceae. Tulips are ornamental plants commonly used as cut flowers, potted plants, and a garden favourite. During late April 2015, signs and symptoms of a smut disease were observed for the first time on wild grown woodland tulip, T. sylvestris, in the campus of the University of Tabriz (East Azarbaijan Province, Iran). Based on morphological characteristics, the pathogen was identified as Vankya heufleri. This study provides the first report on the occurrence of this fungus on T. sylvestris in Iran. 

Keywords leaf smut – Liliaceae – teliospores – Tulipa sylvestris – Vankya heufleri
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Article Number 6
Title

Diversity of rust fungus Puccinia on Justicia

Authors

Kumar S, Singh R, Gond DK

Received 29 May 2016
Accepted 21 January 2017
Published Online 11 March 2017
Corresponding Author S. Kumar
Abstract

Puccinia bagyanarayanii sp. nov. was discovered on living leaves of Justicia betonica (Acanthaceae) in Madhya Pradesh, India. This species is described, illustrated, and compared with similar taxa. Puccinia bagyanarayanii has a longer pedicle and smooth-walled teliospores compared to similar species known on Justica. A key to similar species of Puccinia found on Justicia is provided. Descriptions and nomenclatural details are deposited in Mycobank. 

Keywords foliicolous rust fungi – fungal diversity – morphotaxonomy – new species – Puccinia
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Article Number 7
Title

Cirsosia humboldtigena sp. nov. (Lembosiaceae, Ascomycetes) on Humboldtia vahliana from Kerala, India

Authors

Mathew KL, Nair NN, Swapna S

Received 20 February 2016
Accepted 18 November 2016
Published Online 11 March 2017
Corresponding Author L. K. Mathew
Abstract

The plant genus Humboldtia contains six species of which five are endemic to Peninsular India. Of these, Humboldtia vahliana was found to be infected with a new species of the genus Cirsosia. Cirsosia humboldtigena sp. nov. is described and illustrated in detail to provide a consolidated account of the species known on this host genus. 

Keywords black mildew − foliicolous fungi − new species
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Article Number 8
Title

Detection of post-harvest fungal diseases of mango by X-ray scanning non-destructive technology

Authors

Gadgile D, Chavan A

Received 14 December 2016
Accepted 06 February 2017
Published Online 13 March 2017
Corresponding Author D. Gadgile
Abstract

The detection of Aspergillus niger rot, anthracnose and Rhizopus rot infection in post-harvest mango fruit was demonstrated by a non-destructive X-ray scanning technique carried out 4 and 5 days post inoculation. It is suggested that such technology for detection of fungal infection may be useful as an imaging-based mango sorting system.

Keywords anthracnose – Aspergillus niger rot – Mangifera indica – novel technique – Rhizopus rot
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Article Number 9
Title

Field evaluation of beneficial and deleterious effects of rhizobacteria on cotton stand and yield

Authors

Aly AA, Gomaa EZ, Ashour SME, Zayed AZ, Mostafa MA

Received 19 July 2016
Accepted 29 December 2016
Published Online 29 May 2017
Corresponding Author M. A. Mostafa
Abstract

Thirteen Bacillus strains, one Lactibacillus strain, and two Pseudomonas strains were isolated from the rhizosphere of cotton seedlings collected at various locations in Egypt. Three field trials were conducted at Sakha (North Delta Region), El-Gemmeiza (Middle Delta Region), and Sirs El-Lian (Middle Delta Region) in 2015 to evaluate the beneficial and deleterious effects of rhizobacteria on cotton stand and yield. Field evaluation revealed inconsistent performance among strains from one site to another. Thus, while certain strains effectively controlled seedling damping-off at some locations, they were ineffective in controlling the disease at other locations or even increased disease. Seedling stand counts were not correlated with seed cotton yield at Sakha and El-Gemmeiza, while they were highly correlated at Sirs El-Lian. Regarding each of seedling stand counts (survival) and yield, the performance of the tested strains at any site was not correlated with their performance at the other two sites. Grouping the strains by cluster analysis based on their effect patterns was neither related to their taxonomic position nor to geographic origins. Of the 16 strains, strain no. 10 of Bacillus circulans is a promising strain for commercialization for two reasons: firstly, it significantly increased stand at all sites and secondly, it significantly increased seed cotton yield at Sirs El-Lian. 

Keywords cotton – rhizobacteria – stand – yield
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Article Number 10
Title

Histopathological studies of sesame (Sesamum indicum) seedlings infected with Fusarium oxysporum

Authors

Ara A, Akram A, Ajmal M, Akhund S, Nayyar BG, Seerat W, Chaudhry SM

Received 24 June 2016
Accepted 16 January 2017
Published Online 30 June 2017
Corresponding Author W. Seerat
Abstract

Sesame (Sesamum indicum L.) is one of the most important and oldest oil seed crops, and vascular wilt caused by the soil-borne fungus Fusarium oxysporum is the most destructive disease of sesame worldwide. Histopathological studies were conducted on sesame plants after artificial inoculation with F. oxysporum. Characteristic disease symptoms such as chlorotic and wilted leaves appeared 15–20 days after inoculation. Light microscopic studies revealed the presence of pathogen in xylem vessels during initial stages. The pathogen then moved to adjacent cortical and epidermal cells intercellularly causing disintegration of the cells. Formation of cavities and plugging of xylem vessels with gum was observed, which retards water and nutrient supply to plants, thus resulting in wilting and ultimately leading to death of plant.

Keywords disease – histopathology – inoculation – pathogen – sesame
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Plant Pathology & Quarantine Online publishes reviews, research articles, methodology papers, taxonomic works such as monographs, and checklists which are relevant toplant pathology and quarantine. The official journal language is English.

 

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