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Research Article EFFICACY of BIOCONTROL AGENTS AGAINST Phytophthora Nicotianae Var
International Journal of Agriculture Sciences ISSN: 0975-3710 & E-ISSN: 0975-9107, Volume 10, Issue 10, 2018, pp.-6109-6110. Available online at https://www.bioinfopublication.org/jouarchive.php?opt=&jouid=BPJ0000217 Research Article EFFICACY OF BIOCONTROL AGENTS AGAINST Phytophthora nicotianae var. parasitica, THE CAUSAL ORGANISM OF BUCKEYE ROT OF TOMATO MONICA SHARMA1*, SHRIDHAR B.P.1 AND SHARMA AMIT2 1Department of Plant Pathology, College of Horticulture and Forestry, Neri, Dr YS Parmar University of Horticulture and Forestry, Solan, 173230, Himachal Pradesh, India 2Department of Basic Science, College of Horticulture and Forestry, Neri, Dr YS Parmar University of Horticulture and Forestry, Solan, 173230, Himachal Pradesh, India *Corresponding Author: Email - [email protected] Received: May 15, 2018; Revised: May 26, 2018; Accepted: May 27, 2018; Published: May 30, 2018 Abstract: To replace hazardous agrochemicals, biological solution is provided by nature in the form of microorganisms having capacity to suppress the growth of plant pathogens and to promote the plant growth. Buckeye rot of tomato caused by Phytophthora nicotianae var. parasitica is a serious threat to the crop production and has taken a heavy toll of the crop in India which affects mostly the fruits during both spring and winter season crops. In the present investigation, six biological control agents were screened for the efficacy against mycelial growth of P. nicotianae var. parasitica. Out of the six fungal and bacterial biocontrol agents tested, Trichoderma virens resulted in maximum mycelial growth inhibition (77.67%) of the test pathogen followed by T. hamatum (69.40 %), T. harzianum (68.52 %) and T. viride (67.43 %). -
And Studying P. Capsici and Phytophthora Hybrids in Peru
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 8-2008 Generating Genetic Resources for Phytophthora capsici (L.) and Studying P. capsici and Phytophthora Hybrids in Peru Oscar Pietro Hurtado-Gonzales University of Tennessee - Knoxville Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Part of the Earth Sciences Commons Recommended Citation Hurtado-Gonzales, Oscar Pietro, "Generating Genetic Resources for Phytophthora capsici (L.) and Studying P. capsici and Phytophthora Hybrids in Peru. " PhD diss., University of Tennessee, 2008. https://trace.tennessee.edu/utk_graddiss/455 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Oscar Pietro Hurtado-Gonzales entitled "Generating Genetic Resources for Phytophthora capsici (L.) and Studying P. capsici and Phytophthora Hybrids in Peru." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Plants, Soils, and Insects. Kurt H. Lamour, Major Professor We have read this dissertation and recommend its acceptance: Feng Chen, John K. Moulton, Beth Mullin Accepted for the Council: Carolyn R. Hodges Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) To the Graduate Council: I am submitting herewith a thesis written by Oscar Pietro Hurtado-Gonzales entitled “Generating genetic resources for Phytophthora capsici (L.) and studying P. -
Penetration of Hard Substrates by a Fungus Employing Enormous Turgor Pressures (Appressorium/Biodeterioration/Magnaporthe Gnsea/Plant Pathogen/Rice Blast) RICHARD J
Proc. Natd. Acad. Sci. USA Vol. 88, pp. 11281-11284, December 1991 Microbiology Penetration of hard substrates by a fungus employing enormous turgor pressures (appressorium/biodeterioration/Magnaporthe gnsea/plant pathogen/rice blast) RICHARD J. HOWARD*t, MARGARET A. FERRARI*, DAVID H. ROACHt, AND NICHOLAS P. MONEY§ *Central Research and Development, and tFibers, The DuPont Company, Wilmington, DE 19880-0402; and §Department of Biochemistry, Colorado State University, Fort Collins, CO 80523 Communicated by Arthur Kelman, September 20, 1991 (receivedfor review June 27, 1991) ABSTRACT Many fungal pathogens penetrate plant MATERIALS AND METHODS an The rice leaves from a specialized cell called appressorium. Organism and Growth Conditions. These studies were blast pathogen Magnaporthegnsea can also penetrate synthetic conducted with strain 042 (see ref. 8) of M. grisea (Hebert) surfaces such as poly(vinyl chloride). Previous experiments time requires an elevated appres- Barr, telomorph of Pyricularia grisea Sacc. (10). The have suggested that penetration course of infection-structure development in vitro has been sorial turgor pressure. In the present report we have used well documented and closely resembles development on the nonbiodegradable Mylar membranes, exhibiting a range of in that penetration is host (11, 12). When harvested and placed on a surface surface hardness, to test the proposition distilled water, conidia germinate in 1-3 hr to form germ driven by turgor. Reducing appressorial turgor by osmotic to form and are firmly stress inhibited penetration ofthese membranes. The size ofthe tubes. By 4 hr appressoria begin was a function of attached to the substratum. By 6-8 hr their structure appears turgor deficit required to inhibit penetration complete. -
Plant Life MagillS Encyclopedia of Science
MAGILLS ENCYCLOPEDIA OF SCIENCE PLANT LIFE MAGILLS ENCYCLOPEDIA OF SCIENCE PLANT LIFE Volume 4 Sustainable Forestry–Zygomycetes Indexes Editor Bryan D. Ness, Ph.D. Pacific Union College, Department of Biology Project Editor Christina J. Moose Salem Press, Inc. Pasadena, California Hackensack, New Jersey Editor in Chief: Dawn P. Dawson Managing Editor: Christina J. Moose Photograph Editor: Philip Bader Manuscript Editor: Elizabeth Ferry Slocum Production Editor: Joyce I. Buchea Assistant Editor: Andrea E. Miller Page Design and Graphics: James Hutson Research Supervisor: Jeffry Jensen Layout: William Zimmerman Acquisitions Editor: Mark Rehn Illustrator: Kimberly L. Dawson Kurnizki Copyright © 2003, by Salem Press, Inc. All rights in this book are reserved. No part of this work may be used or reproduced in any manner what- soever or transmitted in any form or by any means, electronic or mechanical, including photocopy,recording, or any information storage and retrieval system, without written permission from the copyright owner except in the case of brief quotations embodied in critical articles and reviews. For information address the publisher, Salem Press, Inc., P.O. Box 50062, Pasadena, California 91115. Some of the updated and revised essays in this work originally appeared in Magill’s Survey of Science: Life Science (1991), Magill’s Survey of Science: Life Science, Supplement (1998), Natural Resources (1998), Encyclopedia of Genetics (1999), Encyclopedia of Environmental Issues (2000), World Geography (2001), and Earth Science (2001). ∞ The paper used in these volumes conforms to the American National Standard for Permanence of Paper for Printed Library Materials, Z39.48-1992 (R1997). Library of Congress Cataloging-in-Publication Data Magill’s encyclopedia of science : plant life / edited by Bryan D. -
Disease Update
Disease Update The Long List of Diseases Affecting Tomatoes and Peppers in a Wet Growing Season By Thomas A. Zitter Cornell University (May 2001) Introduction The 2000 growing season will be remembered for the large number of diseases that could be found on both tomatoes and peppers. Some of these diseases are common to both crops, and include bacterial leaf spot, Phytophthora blight, and white mold. In this report, we will focus on the main fungal (late blight, early blight, Septoria leaf blight, Phytophthora blight), and bacterial (spot, speck and canker) diseases of tomato/pepper. Tomato Late Blight Tomato growers should be aware that late blight infections of this crop are not new in New York, but occurrence of the disease has definitely increased during the 1990s with the arrival of new immigrant strains of Phytophthora infestans. In 1993, U.S.-7 caused widespread losses in home gardens in rural upstate New York, with the disease eventually spreading into four counties (Oneida, Herkimer, Madison and Oswego). In 1996, late blight samples confirmed in the Plant Disease Diagnostic Lab were submitted from six counties (Chautaupqua, Ontario, Tioga, Orange, Schenectady and Clinton), consisting of U.S.-1, U.S.-8 and U.S.-17. Once again, the infections for the most part were limited to home gardens or tomato plantings used for nearby roadside stands. In 1997, both commercial and homeowners suffered the greatest losses to late blight previously recorded. Tomato late blight was verified by the Diagnostic Lab from samples submitted from 12 counties from western, central and eastern New York. -
S41467-021-25308-W.Pdf
ARTICLE https://doi.org/10.1038/s41467-021-25308-w OPEN Phylogenomics of a new fungal phylum reveals multiple waves of reductive evolution across Holomycota ✉ ✉ Luis Javier Galindo 1 , Purificación López-García 1, Guifré Torruella1, Sergey Karpov2,3 & David Moreira 1 Compared to multicellular fungi and unicellular yeasts, unicellular fungi with free-living fla- gellated stages (zoospores) remain poorly known and their phylogenetic position is often 1234567890():,; unresolved. Recently, rRNA gene phylogenetic analyses of two atypical parasitic fungi with amoeboid zoospores and long kinetosomes, the sanchytrids Amoeboradix gromovi and San- chytrium tribonematis, showed that they formed a monophyletic group without close affinity with known fungal clades. Here, we sequence single-cell genomes for both species to assess their phylogenetic position and evolution. Phylogenomic analyses using different protein datasets and a comprehensive taxon sampling result in an almost fully-resolved fungal tree, with Chytridiomycota as sister to all other fungi, and sanchytrids forming a well-supported, fast-evolving clade sister to Blastocladiomycota. Comparative genomic analyses across fungi and their allies (Holomycota) reveal an atypically reduced metabolic repertoire for sanchy- trids. We infer three main independent flagellum losses from the distribution of over 60 flagellum-specific proteins across Holomycota. Based on sanchytrids’ phylogenetic position and unique traits, we propose the designation of a novel phylum, Sanchytriomycota. In addition, our results indicate that most of the hyphal morphogenesis gene repertoire of multicellular fungi had already evolved in early holomycotan lineages. 1 Ecologie Systématique Evolution, CNRS, Université Paris-Saclay, AgroParisTech, Orsay, France. 2 Zoological Institute, Russian Academy of Sciences, St. ✉ Petersburg, Russia. 3 St. -
Evolutionary Histories of Soil Fungi Are Reflected in Their Large
Ecology Letters, (2014) doi: 10.1111/ele.12311 LETTER Evolutionary histories of soil fungi are reflected in their large- scale biogeography Abstract Kathleen K. Treseder,1* Mia R. Although fungal communities are known to vary along latitudinal gradients, mechanisms underly- Maltz,1 Bradford A. Hawkins,1 ing this pattern are not well-understood. We used high-throughput sequencing to examine the Noah Fierer,2 Jason E. Stajich3 and large-scale distributions of soil fungi and their relation to evolutionary history. We tested the Trop- Krista L. McGuire4 ical Conservatism Hypothesis, which predicts that ancestral fungal groups should be more restricted to tropical latitudes and conditions than would more recently derived groups. We found support for this hypothesis in that older phyla preferred significantly lower latitudes and warmer, wetter conditions than did younger phyla. Moreover, preferences for higher latitudes and lower pre- cipitation levels were significantly phylogenetically conserved among the six younger phyla, possibly because the older phyla possess a zoospore stage that is vulnerable to drought, whereas the younger phyla retain protective cell walls throughout their life cycle. Our study provides novel evidence that the Tropical Conservatism Hypothesis applies to microbes as well as plants and animals. Keywords Latitude, phylum, precipitation, regular septa, snowball earth events, soil, temperature, traits, zoo- spore. Ecology Letters (2014) Here, we test predictions of TCH as they may apply to a INTRODUCTION group of organisms much older than those normally consid- Numerous studies have reported shifts in fungal community ered. The Earth’s paleoclimate was relatively warm and wet composition by latitude, temperature, and precipitation during the earliest evolution of ancestral fungi, whereas severe (Arnold & Lutzoni 2007; Tedersoo et al. -
Course No. Pl.Path.5.4 DISEASES of FIELD and HORTICULTURAL
Theory Note B. Sc (Agril.) Course No. Pl.Path.5.4 DISEASES OF FIELD AND HORTICULTURAL CROPS AND THEIR MANAGEMENT-I(CREDIT 2+1) Semester-V Compiled and Edited by DR. D.M.PATHAK ASSOCIATE PROFESSOR AND HEAD DEPARTMENT OF PLANT PATHOLOGY COLLEGE OF AGRICULTURE NAVSARI AGRICULTURAL UNIVERSITY CAMPUS BHARUCH -392012 Course Title: Diseases of Field and Horticultural Crops and Their Management- I Course No. Pl. Path. 5.4 Course Credit: 2 + 1 = 3 SYLLABUS Theory: Economic importance, symptoms, etiology, epidemiology, disease cycle and integrated management of diseases of Groundnut, Sesamum, Castor, Cotton, Bajra, Finger millet, Sorghum, Maize, Rice, Pigeon pea, Soybean, Black gram, green gram, Tobacco, Coconut, Pomegranate, Tea, Coffee, Banana, Papaya, Tomato, Okra, Brinjal, Cluster bean, Beans and Colocasia. Practical: Identification and histopathological studies of selected diseases of field and horticultural crops covered in theory. Field visit for the diagnosis of field and horticultural crop diseases.Collection and preservation of plant diseased specimens for Herbarium. Suggested readings: 1. Sanjeev Kumar (2016). Diseases of Field Crops and Their Integrated Management. New India Publishing Agency, New Delhi – 110 034 2. Shahid Ahamad and Udit Narain (2007). Ecofriendly management of plant diseases. Daya Publishing house, New Delhi – 110 035. 3. Rangaswami, G. and Mahadevan, A. (2008). Diseases of crop plants in India. PHI Learning Pvt. Ltd., New Delhi – 110 001. 4. Sanjeev Kumar (2015). Diseases of horticultural crops: Identification & management. New India Publishing Agency, New Delhi – 110 034. 5. Singh,R. S. (2018). Diseases of fruit crops. MEDTECH A division of Scientific International Pvt. Ltd. New Delhi – 110 002. 6. Sharma,I. -
The Taxonomy and Biology of Phytophthora and Pythium
Journal of Bacteriology & Mycology: Open Access Review Article Open Access The taxonomy and biology of Phytophthora and Pythium Abstract Volume 6 Issue 1 - 2018 The genera Phytophthora and Pythium include many economically important species Hon H Ho which have been placed in Kingdom Chromista or Kingdom Straminipila, distinct from Department of Biology, State University of New York, USA Kingdom Fungi. Their taxonomic problems, basic biology and economic importance have been reviewed. Morphologically, both genera are very similar in having coenocytic, hyaline Correspondence: Hon H Ho, Professor of Biology, State and freely branching mycelia, oogonia with usually single oospores but the definitive University of New York, New Paltz, NY 12561, USA, differentiation between them lies in the mode of zoospore differentiation and discharge. Email [email protected] In Phytophthora, the zoospores are differentiated within the sporangium proper and when mature, released in an evanescent vesicle at the sporangial apex, whereas in Pythium, the Received: January 23, 2018 | Published: February 12, 2018 protoplast of a sporangium is transferred usually through an exit tube to a thin vesicle outside the sporangium where zoospores are differentiated and released upon the rupture of the vesicle. Many species of Phytophthora are destructive pathogens of especially dicotyledonous woody trees, shrubs and herbaceous plants whereas Pythium species attacked primarily monocotyledonous herbaceous plants, whereas some cause diseases in fishes, red algae and mammals including humans. However, several mycoparasitic and entomopathogenic species of Pythium have been utilized respectively, to successfully control other plant pathogenic fungi and harmful insects including mosquitoes while the others utilized to produce valuable chemicals for pharmacy and food industry. -
Flagellar Structures of Zoospores of Some Fungi and Algae
I III I n II ‘ I I | II II I I II I I I A ,- I I FLAGELLAR STRUCTURES OF ZOOSPORES OF SOME FUNGI AND ALGAE THESIS FOR DEGREE OF MASTEh LF SCIENCE MICHIGAN STATE COLLEGE BERNARD ELLISON I944 THESIS This is to certify that the thesis entitled £;:lat7/LIUL“- z4:2:;;cjt;¢‘t :jj 2F4""%L’L“ <5 ,ALIhLL ,¢E¢4flfi}£~‘ap«a( 0p19‘vk presented by MW has been accepted towards fulfilment of the requirements for K“ g degree in W Major professo Date M (I /?/'/</ FIAGELLAR STRUC'IURES OF ZOOSPORES 01" SM FUNGI AND AIGAE by BERNARD 1I_*‘3“.I..I.ISOI\I A 1531313 Sutmitted to the Graduate School of Michigan State College of Agriculture and Applied Science in partial fulfilment of the requirements for the degree or MASTER OF SCIENCE Department of Botany and Plant Pathology THESIS ACKNCNLEDGSM’WT I should like to eXpress my appreciation to Dr. Ernst A. Bessey for suggesting this research problem and for his valuable aid and advice. His interest and encouragement have been a source of inspiration to me throughout the course of the investigation and his suggestions and criticisms have been most helpful. I should also like to thank Mr. John M. Roberts for many stimulating and valuable suggestions and for furnishing me with certain material used in the investigation. Likewise I should like to express my thanks to D. J. C. Walker of the Agricultural College of the University of Wisconsin, and to Dr. C. M. Haenseler of the New Jersey Experiment Station who were good enough to furnish me with clubbed cabbage roots from which I obtained the zoospores of Plasmodiophora brassicae. -
Morphology, Ultrastructure, and Molecular Phylogeny of Rozella Multimorpha, a New Species in Cryptomycota
DR. PETER LETCHER (Orcid ID : 0000-0003-4455-9992) Article type : Original Article Letcher et al.---A New Rozella From Pythium Morphology, Ultrastructure, and Molecular Phylogeny of Rozella multimorpha, a New Species in Cryptomycota Peter M. Letchera, Joyce E. Longcoreb, Timothy Y. Jamesc, Domingos S. Leited, D. Rabern Simmonsc, Martha J. Powella a Department of Biological Sciences, The University of Alabama, Tuscaloosa, 35487, Alabama, USA b School of Biology and Ecology, University of Maine, Orono, 04469, Maine, USA c Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, 48109, Michigan, USA d Departamento de Genética, Evolução e Bioagentes, Universidade Estadual de Campinas, Campinas, SP, 13082-862, Brazil Corresponding author: P. M. Letcher, Department of Biological Sciences, The University of Alabama, 1332 SEC, Box 870344, 300 Hackberry Lane, Tuscaloosa, Alabama 35487, USA, telephone number:Author Manuscript +1 205-348-8208; FAX number: +1 205-348-1786; e-mail: [email protected] This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/jeu.12452-4996 This article is protected by copyright. All rights reserved ABSTRACT Increasing numbers of sequences of basal fungi from environmental DNA studies are being deposited in public databases. Many of these sequences remain unclassified below the phylum level because sequence information from identified species is sparse. Lack of basic biological knowledge due to a dearth of identified species is extreme in Cryptomycota, a new phylum widespread in the environment and phylogenetically basal within the fungal lineage. -
Investigating the Biology of Plant Infection by Magnaporthe Oryza
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Fungal Molecular Plant-Microbe Interactions Plant Pathology Department 2009 Under Pressure: Investigating the Biology of Plant Infection by Magnaporthe oryza Nicholas J. Talbot University of Exeter, [email protected] Richard A. Wilson University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/plantpathfungal Part of the Plant Pathology Commons Talbot, Nicholas J. and Wilson, Richard A., "Under Pressure: Investigating the Biology of Plant Infection by Magnaporthe oryza" (2009). Fungal Molecular Plant-Microbe Interactions. 7. https://digitalcommons.unl.edu/plantpathfungal/7 This Article is brought to you for free and open access by the Plant Pathology Department at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Fungal Molecular Plant- Microbe Interactions by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Published in Nature Reviews: Microbiology (March 2009) 7: 185-195. Copyright 2009, Macmillan. DOI: 10.1038/nrmicro2032. Used by permission. Reviews Under Pressure: Investigating the Biology of Plant Infection by Magnaporthe oryza Richard A. Wilson and Nicholas J. Talbot School of Biosciences, University of Exeter, Exeter, United Kingdom; correspondence to [email protected] Wilson, affiliation 2012: University of Nebraska-Lincoln, Lincoln, Nebraska, U.S.A.; [email protected] Abstract The filamentous fungus Magnaporthe oryzae causes rice blast, the most serious disease of cultivated rice. Cellular differentia- tion of M. oryzae forms an infection structure called the appressorium, which generates enormous cellular turgor that is suffi- cient to rupture the plant cuticle. Here, we show how functional genomics approaches are providing new insight into the ge- netic control of plant infection by M.