Dehydrin transcript fluctuations during a day/night cycle in drought-stressed sunflower.
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.
Cellier
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F
INRA/CNRS (URA2133)/ENSA-M/UMII, Montpellier, France. cellier@ensam.inra.fr
Conéjéro
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G
Casse
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F
D002940:Circadian Rhythm; D004190:Disasters; D006368:Helianthus / Q000235:genetics* / Q000502:physiology; D010940:Plant Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics*
D010940:Plant Proteins; D012333:RNA, Messenger; C070556:dehydrin proteins, plant