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Investigation of mRNA Expression of Early Light Inducible Protein (ELIP) under High Light Stress <em>Arabidopsis thaliana</em>.

Plants absorb light for photosynthesis, but not all is used. Excess light energy may lead to photoinhibition of photosynthesis and irreversible photooxidative damage. Plants have evolved mechanisms for energy dissipation under high light stress. One such response may involve production of ELIP.
It is of interest to know what signal(s) may be involved in ELIP expression. My hypothesis is that redox status of the chloroplast photosynthetic electron transport Chain (PETC) and/or chlororespiration may induce ELIP expression. Using the Arabidopsis thaliana immutans (im) chlororespiratory mutant, this hypothesis was tested. Etiolated seedlings of this variegated mutant were subjected to various light intensities over 0-24 hr period and ELIP mRNA levels were analyzed. These were compared with the wild type plants treated in the same manner.
It was found that mature thylakoids may not be required for ELIP expression, and that both photoreceptor-dependent and independent components may be involved in ELIP expression.

Identiferoai:union.ndltd.org:ETSU/oai:dc.etsu.edu:etd-1092
Date01 December 2001
CreatorsOza, Preeti Bhavanishanker
PublisherDigital Commons @ East Tennessee State University
Source SetsEast Tennessee State University
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourceElectronic Theses and Dissertations
RightsCopyright by the authors.

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