First report of <i>Alternaria alternata</i> causing leaf spot on <i>Stevia rebaudiana</i>

Maiti, C. K.; Sen, Surjit; Acharya, Rabinarayan; Acharya, Krishnendu

doi:10.1111/j.1365-3059.2007.01578.x

Cited by 23 publications

(12 citation statements)

References 5 publications

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“…The pathogen, A. alternata (strain number: MAMP/C/51) isolated previously by Maiti et al [34] was grown aerobically in 50 ml of fully autoclaved potato-dextrose broth (HiMedia Laboratories Pvt. Ltd., Mumbai, India) in Erlenmeyer flasks having the capacity of 250 ml and kept for 12 days at 30°C temperature.…”

Section: Isolation Of the Pathogen And Culture Maintenancementioning

confidence: 99%

Mycogenesis of gold nanoparticles using a phytopathogen Alternaria alternata

Sarkar

Chattopadhyay

et al. 2011

Bioprocess Biosyst Eng

123

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The development of an eco-friendly and reliable process for the synthesis of gold nanomaterials (AuNPs) using microorganisms is gaining importance in the field of nanotechnology. In the present study, AuNPs have been synthesized by bio-reduction of chloroauric acid (HAuCl(4)) using the fungal culture filtrate (FCF) of Alternaria alternata. The synthesis of the AuNPs was monitored by UV-visible spectroscopy. The particles thereby obtained were characterized by UV, dynamic light scattering (DLS), X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, Fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM) and transmission electron microscopy (TEM). Energy-dispersive X-ray study revealed the presence of gold in the nanoparticles. Fourier transform infrared spectroscopy confirmed the presence of a protein shell outside the nanoparticles which in turn also support their stabilization. Treatment of the fungal culture filtrate with aqueous Au(+) ions produced AuNPs with an average particle size of 12 ± 5 nm. This proposed mechanistic principal might serve as a set of design rule for the synthesis of nanostructures with desired architecture and can be amenable for the large scale commercial production and technical applications.

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Section: Isolation Of the Pathogen And Culture Maintenancementioning

confidence: 99%

Mycogenesis of gold nanoparticles using a phytopathogen Alternaria alternata

Sarkar

Chattopadhyay

et al. 2011

Bioprocess Biosyst Eng

123

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“…Keissl. is an opportunistic pathogen on numerous host plants causing leaf spots, rots and blights (Droby et al, 1984;Pryor and Michailides, 2002;Maiti et al, 2007). More than 380 hosts including A. macrocephala have been recorded to be infected with Alternaria species in the USDA Systematic Botany and Mycology Fungus-Host Distribution Database (Mmbaga et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Morphological, molecular and pathogenic characterization of Alternaria longipes, the fungal pathogen causing leaf spot on Atractylodes macrocephala

Guo-yin¹,

Yang²,

ZhiLin³

et al. 2013

Afr. J. Microbiol. Res.

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Leaf spots were observed on commercial plants of Bai Zhu (Atractylodes macrocephala Koidz.), a perennial herb that is used in traditional Chinese medicine in Panan County of Zhejiang Province, China. Approximately, 40% of the plants surveyed in the field showed severe symptoms of leaf spot during the summer of 2011. Fungal isolates obtained from infected leaf tissues were grown on Potato Dextrose Agar (PDA), and morphological characteristics of the colonies and the sporulating apparatus were determined. DNA extracted from the fungal culture was subjected to polymerase chain reaction (PCR) with primers ITS1F/ITS4 and Alt-for/Alt-rev, amplifying the internal transcribed spacer (ITS) regions and Alternaria allergen gene (Alt a 1 gene), respectively. The resulting PCR products were sequenced and compared for homology with other species in GenBank. Comparison of sequences of the Alt a 1 gene revealed 100% similarity with Alternaria longipes (Ellis & Everh.) E. W. Mason. Pathogenicity of the fungal isolate L 3 was confirmed on A. macrocephala. Taken together, we concluded that A. longipes was the causing agent for the leaf spot on A. macrocephala.

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“…ex. Ait from Rajasthan, India (Sain et al, 2009) and on Stevia rebaudiana from Bengal (Maiti et al, 2006). This is the first record of the disease from the Aravali hills in Gurgaon district (Haryana) India.…”

Section: Resultsmentioning

confidence: 99%