Linking Hsp90 function to micro-environmental and stochastic variation in floralorgans of Iris pumila L

Hsp90 is an environmentally responsive molecular chaperone that was found to play a key role in buffering against genetic and non-genetic perturbations in the model organisms Arabidopsis and Drosophila. Here we analyzed the buffering capacity of Hsp90 against two kinds of non-genetic factors - stoch...

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Bibliographic Details
Published in:Archives of biological sciences 2008, Vol.60 (3), p.411-419
Main Authors: Tucic, Branka, Manitasevic, S., Vuleta, A., Matic, Gordana
Format: Article
Language:English
Subjects:
environmental variation
floral organs
Hsp90
Iris pumila
plasticity
radial asymmetry
stochastic noise
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Summary:Hsp90 is an environmentally responsive molecular chaperone that was found to play a key role in buffering against genetic and non-genetic perturbations in the model organisms Arabidopsis and Drosophila. Here we analyzed the buffering capacity of Hsp90 against two kinds of non-genetic factors - stochastic noise and micro-environmental varia?tion of floral organ traits in naturally growing Iris pumila plants. We found no statistical association between the endog?enous level of Hsp90 and the floral organ radial symmetry produced by stochastic developmental noise. Conversely, floral organ plasticity in response to micro-environmental variation tended to be greater with decrease in Hsp90b isoform expression. Molekularni saperon Hsp90 ima kljucnu ulogu u neutralisanju genetickih i negenetickih poremecaja kod model organizama Arabidopsis i Drosophila. U ovom radu analizirali smo zastitni kapacitet Hsp90 u odnosu na dve vrste negenetickih faktora - stohasticko i mikro-sredinsko variranje osobina cveta u prirodnoj populaciji Iris pumila. Utvrdili smo da nema statisticki znacajne korelacije izmedju endogenog nivoa proteina Hsp90 i radijalne asimetrije uslovljene slucajnim promenama u toku razvica analiziranih cvetnih organa. Nasuprot tome, plasticnost cvetnih organa u odnosu na mikro-sredinsko variranje povecavala se sa smanjenjem ekspresije izoforme Hsp90b.
ISSN:0354-4664
1821-4339
DOI:10.2298/ABS0803411T