Book of Abstracts (PDF) - International Mycological Association

More documents

Recommendations

Info

IMC7 Main Congress Theme IV: POPULATION DYNAMICS AND ECOLOGY Posters 1039 - Molecular ecology of Bistorta vivipara ectomycorrhiza in alpine tundra communities J.H. Sønstebø * , K. Høiland & T. Schumacher University of Oslo, Department of Biology, Division of Botany and Plant Physiology, P.O. Box 1045 Blindern, 0316 Oslo, Norway. - E-mail: jornso@bio.uio.no We have studied the diversity and phylogenetic affinities of mycobionts of Bistorta vivipara ectomycorrhizas in four alpine tundra plant communities in Norway, using ITS1-5.8 sequences as a diversity marker. ITS1-5.8 sequences obtained by direct sequencing of 114 ectomycorrhizal root tips compared with sequences from known fungal taxa showed a high diversity of fungal mycobionts, including mycobionts from a number of distantly related taxonomic groups. The composition and taxonomic specificity of the ectomycorrhizal fungi varied considerably among the study sites. This suggests that B. vivipara is capable to interact with a number of ectomycorrhizal fungal partners in its many divergent habitats of the lowlands as well as in the alpine zone. Frequent members of the B. vivipara ectomycorrhizal symbiosis include Tomentella, Russula, Inocybe, Cortinarius, Laccaria, Hebeloma, Cenococcum and some unidentified members of Sebacinaceae. The observed high abundance and diversity of Tomentella mycobionts add to the earlier observations of importance of this genus as ectomycorrhizal former also in boreal forest ecosystems. The sebacinaceous ectomycorrhizal fungal partners showed affinity (95% similarity) to orchid mycorrhizal isolates from root tips of Neottia nidus-avis retrieved from GenBank. 1040 - Analysing the genetic structure of Botrytis spp. in lily and tulip fields using molecular markers M. Staats * , P. van Baarlen & J.A.L. van Kan Wageningen University, Laboratory of Phytopathology, PO Box 8025, 6700 EE Wageningen, The Netherlands. - Email: Martijn.Staats@fyto.dpw.wau.nl Botrytis spp. that are pathogenic on flower bulb crops are generally assumed to be host-specific. On lily, B. elliptica produces primary necrotic lesions which potentially expand into healthy tissue. On the non-host tulip, however, B. elliptica can only cause primary necrotic lesions. The reciprocal holds true for B. tulipae, which uses tulip as its host. The mechanistic and genetic basis of host specificity of the two Botrytis species mentioned is unclear. Distinction between the species thus far relies on morphological characteristics. At this moment it is unknown to what extent sexual reproduction contributes to genetic variation in local populations of Botrytis spp. in lily and tulip fields. A sexual stage has so far been detected in B. elliptica but not in B. tulipae. The purpose of this study is to develop DNA markers to characterise the level of inter- and intraspecific heterogeneity and the amount of genetic recombination in B. elliptica and B. tulipae field 314 Book of Abstracts isolates. To reach these objectives we will use a combination of sequence analysis and novel DNA fingerprinting methods. - This research is funded by the Dutch Technology Foundation STW. 1041 - Molecular markers associated with virulent and avirulent phenotypes in populations of Uromyces appendiculatus from bean fields in the Central USA J.R. Steadman * , A.T. Alleyne, J.G. Fenton & K.M. Eskridge University of Nebraska, 406 Plant Sciences, Lincoln, NE 68583-0722, U.S.A. - E-mail: jsteadman1@unl.edu Uromyces appendiculatus, cause of bean rust, is characterized by highly diverse virulence phenotypes. The use of race-specific rust resistance genes has been complicated by the 'boom and bust' cycle. Pinto Olathe was released as a rust resistant bean cultivar containing the Ur- 6 gene in 1979. The resistance only lasted 5 years. Resistance gene pyramiding is a strategy to strengthen race-specific resistance. Phenotyping the rust population is time-consuming and costly. Pathogen variation can also be monitored by genotyping. Previous work on molecular variation in rust pathotypes have examined geographic significance of rust races and the association between resistance and virulence patterns. In the present study we monitored the changing pattern of virulence on pinto 'Olathe' over the past 20 years using both molecular and phenotypic markers. A population of over 130 isolates from the Central USA representing both avirulent and virulent pathotypes on pinto Olathe were analyzed using molecular markers such as rep-PCR and RAPD-PCR. These markers were found to discriminate between rust pathogen genotypes with virulent or avirulent interactions with the Ur-6 gene. In addition, cluster analysis of the molecular data using UPGMA methods showed agreement between statistical analysis and cluster associations of these pathotypes with selected markers. 1042 - Annual production of leaf-decomposing fungi in streams K. Suberkropp 1* , B.R. Methvin 1 , M.D. Carter 2 & H.S. Weyers 3 1 University of Alabama, Tuscaloosa, AL, U.S.A. - 2 Noth Carolina State University, Raleigh, NC, U.S.A. - 3 U. S. Geological Survey, Dover, DE, U.S.A. - E-mail: ksuberkp@bama.ua.edu We have determined the annual production of fungi associated with decomposing leaves in seven streams in the southeastern United States using rates of acetate incorporation into ergosterol to calculate in situ growth rates and ergosterol concentrations to estimate fungal biomass. Annual fungal production ranged from 8-551 g/m 2 in these streams. Fungal production was significantly
IMC7 Main Congress Theme IV: POPULATION DYNAMICS AND ECOLOGY Posters correlated with the mean amount of leaf litter present in the streams throughout the year (r=0.72, p
Page 1 and 2:
IMC7 Book of Abstracts The 7th Inte
Page 3 and 4:
11-17 August 2002 IMC7 The imc7 Org
Page 5 and 6:
IMC7 Monday August 12th Lectures Am
Page 7 and 8:
IMC7 Monday August 12th Lectures 12
Page 9 and 10:
IMC7 Monday August 12th Lectures Ph
Page 11 and 12:
Page 13 and 14:
IMC7 Monday August 12th Lectures KR
Page 15 and 16:
IMC7 Monday August 12th Lectures di
Page 17 and 18:
IMC7 Monday August 12th Lectures re
Page 19 and 20:
IMC7 Monday August 12th Lectures ph
Page 21 and 22:
IMC7 Monday August 12th Lectures st
Page 23 and 24:
Page 25 and 26:
IMC7 Monday August 12th Lectures of
Page 27 and 28:
Page 29 and 30:
IMC7 Monday August 12th Lectures of
Page 31 and 32:
Page 33 and 34:
IMC7 Tuesday August 13th Lectures 9
Page 35 and 36:
Page 37 and 38:
IMC7 Tuesday August 13th Lectures q
Page 39 and 40:
IMC7 Tuesday August 13th Lectures e
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
IMC7 Tuesday August 13th Lectures w
Page 47 and 48:
Page 49 and 50:
IMC7 Tuesday August 13th Lectures s
Page 51 and 52:
IMC7 Tuesday August 13th Lectures T
Page 53 and 54:
IMC7 Tuesday August 13th Lectures g
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
IMC7 Tuesday August 13th Lectures i
Page 61 and 62:
IMC7 Tuesday August 13th Lectures a
Page 63 and 64:
Page 65 and 66:
IMC7 Tuesday August 13th Lectures s
Page 67 and 68:
IMC7 Wednesday August 14th Lectures
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
IMC7 Thursday August 15th Lectures
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
IMC7 Friday August 16th Lectures 34
Page 111 and 112:
IMC7 Friday August 16th Lectures ha
Page 113 and 114:
IMC7 Friday August 16th Lectures in
Page 115 and 116:
Page 117 and 118:
IMC7 Friday August 16th Lectures po
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
IMC7 Friday August 16th Lectures Lo
Page 127 and 128:
IMC7 Friday August 16th Lectures co
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
IMC7 Friday August 16th Lectures ar
Page 135 and 136:
IMC7 Friday August 16th Lectures tr
Page 137 and 138:
Page 139 and 140:
IMC7 Main Congress Theme I: BIODIVE
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
IMC7 Main Congress Theme II: SYSTEM
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
IMC7 Main Congress Theme III: PATHO
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Page 263 and 264: IMC7 Main Congress Theme III: PATHO
Page 279 and 280: IMC7 Main Congress Theme IV: POPULA
Page 313: IMC7 Main Congress Theme IV: POPULA
Page 323 and 324: IMC7 Main Congress Theme V: CELL BI
Page 365 and 366:
IMC7 Main Congress Theme V: CELL BI
Page 367 and 368:
Cavernularia: 356 Cenococcum: 500,
Page 369 and 370:
Hyalorbilia: 479 Hyalorhinocladiell
Page 371 and 372:
Phlebopus: 828 Pholiota: 304, 515 P
Page 373 and 374:
Verrucaria: 616 Verruculina: 963 Ve
Page 375 and 376:
Order Index Agaricales: 40, 50, 51,
Page 377 and 378:
Bogomolova, E.V.: 1078 Bohar, Gy.:
Page 379 and 380:
Forlani, G.: 565 Forsby, A.: 842, 8
Page 381 and 382:
Juuti, J.T.: 701, 1126 Kabrick, J.M
Page 383 and 384:
Morocko, I.: 859 Moser, J.C.: 426,
Page 385 and 386:
Sattayaphisut, W.: 1171 Saunders, E
Page 387 and 388:
Vukojevic, J.: 363 Vurro, M.: 116 V
show all

Book of Abstracts (PDF) - International Mycological Association

Create successful ePaper yourself

Delete template?

Save as template?