{"title":"Statistical treatment of endogonaceous spore counts","authors":"T.V. St John, R.E. Koske","doi":"10.1016/S0007-1536(88)80012-3","DOIUrl":"10.1016/S0007-1536(88)80012-3","url":null,"abstract":"<div><p>Spores of Endogonaceous fungi are spatially aggregated in soil, a fact only rarely recognized by researchers. Several examples from both field and laboratory conditions are presented that illustrate non-normal frequency distributions, with the negative binomial distribution often applicable. In experimental work, appropriate analysis of VAMF spore counts allows more sensitive detection of statistical differences than is possible with methods intended for normal distributions.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"91 1","pages":"Pages 117-121"},"PeriodicalIF":0.0,"publicationDate":"1988-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80012-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87895612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Inoculum of the take-all fungus in rotations of wheat and pasture: Relationships to disease and yield of wheat","authors":"P.J. Cotterill , K. Sivasithamparam","doi":"10.1016/S0007-1536(88)80007-X","DOIUrl":"10.1016/S0007-1536(88)80007-X","url":null,"abstract":"<div><p>A field trial was undertaken between 1984 and 1986 to examine the behaviour of <em>Gaeumannomyces graminis</em> var. tritici inoculum through time and as affected by wheat and pasture rotations at a site in the Western Australian wheatbelt. Soil bioassays were carried out to determine infectivity and propagule numbers of the fungus ; incidence and severity of take-all were measured in wheat crops on the site.</p><p>Pasture supported inoculum levels as high as wheat, and in 1984 propagule numbers were greater in a field which had been in pasture the previous two years than in one in wheat the previous year. There were some positive relationships between propagule number and both incidence and severity of take-all, but few between infectivity of <em>G. graminis</em> and disease in the crop. However, more severe take-all was associated with higher propagule numbers, and less severe take-all with lower propagule numbers, when plots were sampled at the end of summer in 1984 and 1985. In 1984 both infectivity and propagule numbers of the take-all fungus were correlated with air and soil temperatures and with soil moisture.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"91 1","pages":"Pages 63-72"},"PeriodicalIF":0.0,"publicationDate":"1988-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80007-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87709986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Scanning electron microscopy of parasitism of Botrytis cinerea on flowers and fruits of cucumber","authors":"Yigal Elad","doi":"10.1016/S0007-1536(88)80025-1","DOIUrl":"10.1016/S0007-1536(88)80025-1","url":null,"abstract":"<div><p>Infection of female flowers of cucumber occurred within one day of inoculation with 10<sup>4</sup>/ml conidia of <em>Botrytis cinerea</em> whereas it took two days to establish infection when 10<sup>2</sup> conidia/ ml served as inoculum. Glucose enhanced the infection rate of sepals, petals and stigmata. Cucumber flowers infected with <em>B. cinerea</em>, studied under the SEM, showed that conidia which germinated on the petal either produced a germ-tube which extended over the surface or penetrated directly into the host tissue. Hyphae of <em>B. cinerea</em> also penetrated the host via natural openings. Germinating conidia produced hyphae 10–100 μm in length before penetrating the stigmata. Young fruits were penetrated either directly or via stomata. Hyphae which approach stomata may produce a swelling over the stomatal cells or may penetrate directly into the stomatal chamber. A dense mycelium was produced over the stigmata within 4 d of inoculation.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"91 1","pages":"Pages 185-190"},"PeriodicalIF":0.0,"publicationDate":"1988-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80025-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79466116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Differentiation of Aspergillus flavus from A. parasiticus and other closely related species","authors":"M.A. Klich, J.I. Pitt","doi":"10.1016/S0007-1536(88)80010-X","DOIUrl":"10.1016/S0007-1536(88)80010-X","url":null,"abstract":"<div><p>More than 150 isolates of <em>Aspergillus flavus, A. oryzae, A. parasiticus, A. sojae</em> and <em>A. tamarii</em> from collections around the world were examined independently in two laboratories as unknowns, and data assessed to evaluate a wide range of morphological characters for suitability as taxonomic criteria. Mycotoxin production was also assessed. It was concluded that conidial wall texture was the most effective criterion for distinguishing <em>A. flavus</em> and <em>A. parasiticus. A. flavus</em> has a broad interface with VA. oryzae; therefore, a combination of characters was necessary to separate these two species. Mycotoxin production correlated well with morphological speciation. Only <em>A. flavus</em> and <em>A. parasiticus</em> isolates produced B aflatoxins. Very few <em>A. flavus</em> isolates produced G aflatoxins whereas almost all <em>A. parasiticus</em> isolates did. The <em>A. parasiticus</em> isolates never produced cyclopiazonic acid, but some isolates of <em>A. flavus, A. tamarii</em> and <em>A. oryzae</em> did.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"91 1","pages":"Pages 99-108"},"PeriodicalIF":0.0,"publicationDate":"1988-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80010-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82178013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Three new Mycena species (Basidiomycota: Tricholomataceae) from Puerto Rico","authors":"D. Jean Lodge","doi":"10.1016/S0007-1536(88)80011-1","DOIUrl":"10.1016/S0007-1536(88)80011-1","url":null,"abstract":"<div><p>Three new species of <em>Mycena</em> are described from the El Verde Research Area in the Luquillo mountains of Puerto Rico: <em>M. gelatinomarginata</em> (sect. <em>Carolinenses</em>), <em>M. singeri</em> (sect. <em>Mycena</em> subsect. <em>Ciliatae</em> stirps <em>Rubromarginata</em>), and <em>M. cuspidatipilosa</em> (sect. <em>Sacchariferae</em>).</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"91 1","pages":"Pages 109-116"},"PeriodicalIF":0.0,"publicationDate":"1988-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80011-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82402894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Production of volatile inhibitors of germination and hyphal extension by Geotrichum candidum","authors":"Nicola D. Mckee, Peter M. Robinson","doi":"10.1016/S0007-1536(88)80017-2","DOIUrl":"10.1016/S0007-1536(88)80017-2","url":null,"abstract":"<div><p>Colonies of <em>Geotrichum candidum</em> produce volatile metabolites which inhibit arthrospore germination and reduce the rate of colony extension. The effects are not due to a reduction in oxygen concentration and/or an increase in carbon dioxide concentration.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"91 1","pages":"Pages 157-160"},"PeriodicalIF":0.0,"publicationDate":"1988-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80017-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79139860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interactions between bacteria and coprophilous Ascomycotina and a Coprinus species on agar and in copromes","authors":"H.M. Safar, R.C. Cooke","doi":"10.1016/S0007-1536(88)80008-1","DOIUrl":"10.1016/S0007-1536(88)80008-1","url":null,"abstract":"<div><p>The effects of <em>Flavobacterium, Methanobacterium, Pseudomonas</em> and <em>Staphylococcus</em> on ascospore germination and mycelial extension in <em>Ascobolus crenulatus, Chaetomium bostrychodes</em> and <em>Sordaria macrospora</em> were studied on agar. Bacteria or their culture filtrates inhibited germination except for <em>Methanobacterium — S. macrospora</em> where only filtrate did so. Bacteria and filtrates reduced germ-tube extension in <em>S. macrospora</em> but had a less consistent effect on <em>A. crenulatus</em> and <em>C. bostrychodes</em>. Mycelial growth of <em>C. bostrychodes</em> and <em>S. macrospora</em> was inhibited by the presence of all bacteria, the effect being especially severe for the latter. By contrast, mycelial growth of <em>A. crenulatus</em> was stimulated by all bacteria.</p><p>When paired with Ascomycotina in copromes, bacteria generally reduced ascocarp production but had little effect on coprome dry weight losses. In the presence of all three Ascomycotina in copromes, bacteria had a differential effect on fruiting such that ascocarp production by <em>A. crenulatus</em> was enhanced whilst that of the other two species was reduced. The exception was <em>Staphylococcus</em> which inhibited fruiting in <em>A. crenulatus</em> and <em>S. macrospora</em> but had little effect on <em>C. bostrychodes</em>.</p><p>When all three Ascomycotina were present in copromes the addition of <em>Coprinus</em> to the community resulted in only <em>S. macrospora</em> producing ascocarps. Addition of bacteria to the community had a differential effect on the <em>Coprinus</em>-induced fruiting pattern, with <em>Flavobacterium</em> and <em>Methanobacterium</em> facilitating fruiting by all three Ascomycotina.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"91 1","pages":"Pages 73-80"},"PeriodicalIF":0.0,"publicationDate":"1988-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80008-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90054208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Alternaria alternata infection of hop (Humulus lupulus) cones","authors":"P. Darby","doi":"10.1016/S0007-1536(88)80073-1","DOIUrl":"10.1016/S0007-1536(88)80073-1","url":null,"abstract":"<div><p>Pathogenicity tests with an isolate of <em>Alternaria alternata</em> obtained from discoloured hop cones demonstrated that it can infect cone tissues under conditions of high humidity. The importance of <em>A. alternata</em> on hops is discussed.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"90 4","pages":"Pages 650-653"},"PeriodicalIF":0.0,"publicationDate":"1988-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80073-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84172679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ultrastructure of collarette formation in Fusarium sect. Liseola and some taxonomic implications","authors":"L.R. Tiedt, W.J. Jooste","doi":"10.1016/S0007-1536(88)80003-2","DOIUrl":"10.1016/S0007-1536(88)80003-2","url":null,"abstract":"<div><p>Collarette characteristics have not played a significant role in <em>Fusarium</em> taxonomy. The ultrastructural characteristics of first conidium formation on phialides of <em>F. annulatum, F. anthophilum, F. fujikuroi, F. moniliforme, F. proliferatum, F. subglutinans</em> and <em>F. succisae</em> have been studied by transmission electron microscopy. The outer wall of the phialide covers the first microconidium and does not constitute any part of the wall of the conidium. This results in enteroblastic conidiogenesis of the first conidium. The apical portion of the outer wall disintegrates and the remnants constitute the collarette. The phialide of <em>F. moniliforme</em> has a thin and delicate collarette while those of the other species are more robust to varying degrees. <em>F. fujikuroi</em> differs significantly from <em>F. moniliforme</em> in collarette characteristics to preclude the suggested synonymy between these species. Further taxonomic implications are discussed.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"90 4","pages":"Pages 531-536"},"PeriodicalIF":0.0,"publicationDate":"1988-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80003-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77861151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Conidiogenesis in Phoma betae","authors":"E. Monte, I. García-Acha","doi":"10.1016/S0007-1536(88)80076-7","DOIUrl":"10.1016/S0007-1536(88)80076-7","url":null,"abstract":"<div><p>Conidiogenesis in <em>Phoma betae</em> (teleomorph: <em>Pleospora betae</em>) was studied using thin sections of pycnidia observed under the TEM. Four stages of conidial ontogeny (initiation, maturation, delimitation and secession) are distinguished. Conidiogenous development in <em>P. betae</em> is described as both holoblastic and enteroblastic.</p></div>","PeriodicalId":101257,"journal":{"name":"Transactions of the British Mycological Society","volume":"90 4","pages":"Pages 659-662"},"PeriodicalIF":0.0,"publicationDate":"1988-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0007-1536(88)80076-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83979696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}