Journal Article

Dehydrin transcript fluctuations during a day/night cycle in drought‐stressed sunflower

Françoise Cellier, Geneviève Conéjéro and Francine Casse

in Journal of Experimental Botany

Published on behalf of Society for Experimental Biology

Volume 51, issue 343, pages 299-304
Published in print February 2000 | ISSN: 0022-0957
Published online February 2000 | e-ISSN: 1460-2431 | DOI: http://dx.doi.org/10.1093/jexbot/51.343.299
Dehydrin transcript fluctuations during a day/night cycle in drought‐stressed sunflower

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To investigate environmental stimuli involved in the modulation of drought‐induced gene expression, the influence of the day/night cycle on the expression of two dehydrin genes (HaDhn1 and HaDhn2) in leaves of sunflowers subjected to mild or severe drought stress has been studied. It was observed that the HaDhn1, but not HaDhn2, transcript oscillated in a diurnal fashion. In severely stressed plants, the peak of HaDhn1 mRNA accumulation occurred at midday.

Keywords: Dehydrin transcript; drought stress; day/night cycle; sunflower; [ABA]xyl, concentration of ABA in xylem sap

Journal Article.  3488 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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