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Abstract Detail

Bryological and Lichenological Section/ABLS

Greenwood , Joshua Lee [1].

Interactive effects of genotype, life history phase, sex and rate of drying upon survival in a desiccated state in the cosmopolitan moss Bryum argenteum.

This project examines relationships between multiple discrete yet interacting factors which act to modulate the survival of mosses during desiccation. The objective this work is to uncover which of the following factors are most influential for survival of desiccation: genotype, life history phase, sex, and rate of drying. In order to examine these relationships fourteen genotypes (8ΓΆ™€, 6ΓΆ™‚ from a national distribution) of Bryum argenteum were exposed to four rates of desiccation (in time at subturgor, 0h, 4h, 12h, and 24h) to a final equilibrating relative humidity (RH) of 50% was reached. The aforementioned drying treatments were applied to individuals from each genotype at four different life history phases (bulbil, juvenile shoot, mature shoot, protonema). Studying these combinations in one experiment allows a comparison of their relative influence upon survival. Preliminary results indicate desiccation survival is most heavily influenced by rate of drying, genotype and life history phase while sex does not appear to be a significant factor. By employing an artificial substrate of filter paper within a contained environment the drying rate can be controlled by altering the amount of water added to the substrate.

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1 - University of Nevada Las Vegas, School of Life Sciences, University of Nevada, Las Vegas, NV, 89154-4004, USA

drying rate.

Presentation Type: Oral Paper:Papers for Sections
Session: 23
Location: River Fork/Grove
Date: Tuesday, July 29th, 2014
Time: 10:15 AM
Number: 23005
Abstract ID:790
Candidate for Awards:A. J. Sharp Award

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