fungi associated with the powdery mildew of buxus trees in gorgan landscape
نویسندگان
چکیده
in this research,for taxonomic studies and identification of the fungi associated with the powdery mildew(oidium euonymi- japonici) of buxus trees (euonymus japonica), the infected leaves were collected during autumn and winter 2012-2013 in gorgan (golestan province -iran). the samples after washing and surface sterilizing, were cultured on pda medium(with boxwood extract).then based on available credible resources, fungi epicoccum nigrum (synonym: epicoccum purpurascens) ، ampelomyces quisqualis ces. ex schlech and phoma sect hetrospora were isolated and identified. e.nigrum produced cottony or felty colonies that were yellow to orange initially and became greenish brown by aging. black dots with diameter 100-200µm were observed macroscopically on the colony surface and were called sporodochia. the hyphae were observed septate and yellow to brown in color after 3 days. conidiophores form clusters and young conidia were round, non septate and pale in color. mature conidia with diameter 15-25 µm were observed brown to black in color with rough surface, contain multiple transverse and vertical septa and had a funnel shaped base. a. quisqualis formed globose, pyriform pycnidia with different dimensions behind the leaf. pycnidium was golden yellow when young, and yellowish to brown at maturity, unilocular with a thick wall, no distinct ostiolum; dehiscence by apical rupture of pycnidium. conidiophores were absent and conidia were found hyaline, ellipsoidal with dimensions 3-4 µm. based on scientific resources, this fungus has been found as a mycoparasite of powdery mildew. phoma sect phoma produced dark olivaceous colony and pycnidia had been found as single or multiple, sub globose with diameter 110-180 µm. pycniospores were abundant, mainely oval or spherical with diameter 1.5-2.5 µm. based on this information, above fungi are reported as new records for iran mycroflora.
منابع مشابه
Fungi Associated With the Powdery Mildew of Buxus Trees in Gorgan Landscape
In this research,for taxonomic studies and identification of the fungi associated with the powdery mildew(Oidium euonymi- japonici) of Buxus trees (Euonymus japonica), the infected leaves were collected during autumn and winter 2012-2013 in Gorgan (Golestan province -Iran). The samples after washing and surface sterilizing, were cultured on PDA medium(with boxwood extract).Then based on availab...
متن کاملFungi Associated With the Powdery Mildew of Buxus Trees in Gorgan Landscape
In this research,for taxonomic studies and identification of the fungi associated with the powdery mildew(Oidium euonymi- japonici) of Buxus trees (Euonymus japonica), the infected leaves were collected during autumn and winter 2012-2013 in Gorgan (Golestan province -Iran). The samples after washing and surface sterilizing, were cultured on PDA medium(with boxwood extract).Then based on availab...
متن کاملa study on the identification of powdery mildew fungi (erysiphaceae) in ardabil landscape, iran
the erysiphaceae are obligatory parasitic fungi that cause powdery mildew disease of green space plants. during this study, powdery mildew fungi were collected and identified from different localities of ardabil landscape, iran. erysiphe rayssiae (on spartium junceum), erysiphe robiniae var. robiniae (on robinia pseudoacacia) and euoidium cf. agerati (on ageratum houstonianum)are new records fo...
متن کاملLIFEGUARD proteins support plant colonization by biotrophic powdery mildew fungi
Pathogenic microbes manipulate eukaryotic cells during invasion and target plant proteins to achieve host susceptibility. BAX INHIBITOR-1 (BI-1) is an endoplasmic reticulum-resident cell death suppressor in plants and animals and is required for full susceptibility of barley to the barley powdery mildew fungus Blumeria graminis f.sp. hordei. LIFEGUARD (LFG) proteins resemble BI-1 proteins in te...
متن کاملA brief global review on the species of cucurbit powdery mildew fungi and new records in Taiwan
In spite of the economic importance of powdery mildew on cucurbits, literature and databases about the fungal species reveal different species numbers and names, often indicating only two species, with inconsistent host specificities for different members of Cucurbitaceae. Revision of the available literature indicates the presence of at least six species of powdery mildews on Cucurbitaceae wit...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
international journal of advanced biological and biomedical researchناشر: casrp publishing company
ISSN 2383-2762
دوره 2
شماره 4 2014
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023