Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition
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Bowling Green State University / OhioLINK
1975
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566297702071394 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-bgsu15662977020713942021-08-03T07:12:35Z Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition Bobbitt, Thomas Floyd Biology Continuous fluorescent light resulted in increased numbers of abnormal fruiting bodies in the Basidiomycete, Panus tigrinus. Increased duration of the dark period prior to the time of continuous light decreased abnormal fruits. The number of normal fruiting bodies remained relatively constant regardless of light/dark treatment. Under total darkness no fruiting occurred. Light induced melanin-mediated changes which directly influenced fruiting. Studies of the development of varieties of P. tigrinus and their light-induced abnormal forms were made with scanning electron microscopy (SEM). Previous reports of var. tigrinus being pseudoangiocarpic were not confirmed. Both var. tigrinus, and var. squamulosus and their abnormal forms all developed gymnocarpically. Regardless of light conditions, fertile basidia and spores were produced on primordia before cap expansion. Abnormal primordia of both varieties developed pockets of concentrated basidia designated as "niduli."Basidiospores developed by the expansion of the wall of the external half of the swelling (l'apophyse) situated at the tip of sterigmata. Uneven growth of a developing spore brought about a shift of approximately 45 degree of the spore apex, causing the spore to reposition in relation to the sterigmata. Germination of spores occurred by swelling and sloughing of the outer walls. The germ tube formed from a bulging of the outward-facing spore wall. The spore wall in both tigrinus varieties was composed of five layers. Specific chemical tests were conducted to determine their composition. The innermost layer, or endosporium, consisted of chitin microfibrils and was surrounded by an electron-dense mesosporium as a sublayer of the episporium. The perisporium layer was probably composed of hexuronic acid. The outermost zone was a thin electron-dense ectosporium layer composed of lipid and protein. Plasma membrane invaginations along the spore wall were postulated to be collection sites for precursor materials. 1975 English text Bowling Green State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566297702071394 http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566297702071394 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
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English |
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NDLTD |
| topic |
Biology |
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Biology Bobbitt, Thomas Floyd Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition |
| author |
Bobbitt, Thomas Floyd |
| author_facet |
Bobbitt, Thomas Floyd |
| author_sort |
Bobbitt, Thomas Floyd |
| title |
Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition |
| title_short |
Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition |
| title_full |
Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition |
| title_fullStr |
Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition |
| title_full_unstemmed |
Biological Studies on the Basidiomycete Panus Tigrinus: Effect of Light On Pileus Formation and Analysis of Spore Wall Composition |
| title_sort |
biological studies on the basidiomycete panus tigrinus: effect of light on pileus formation and analysis of spore wall composition |
| publisher |
Bowling Green State University / OhioLINK |
| publishDate |
1975 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1566297702071394 |
| work_keys_str_mv |
AT bobbittthomasfloyd biologicalstudiesonthebasidiomycetepanustigrinuseffectoflightonpileusformationandanalysisofsporewallcomposition |
| _version_ |
1719456060429828096 |