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Circadian rhythmicity in the expression of a novel light-regulated rice gene

✍ Scribed by Cornelia Reimmann; Robert Dudler

Publisher
Springer
Year
1993
Tongue
English
Weight
732 KB
Volume
22
Category
Article
ISSN
0167-4412

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✦ Synopsis

We have identified and analyzed cDNAs corresponding to a single-copy gene from rice, designated lirl, whose expression exhibits dramatic diurnal fluctuations. The cDNAs encode a putative protein of 128 amino acids with no homology to known proteins. Lirl mRNA accumulates in the light, reaching maximum and minimum steady-state levels at the end of the light and dark period, respectively. The oscillations of Iirl mRNA abundance persist after the plants have been transferred to continuous light or darkness. Plants germinated in the dark have very low levels of lirl mRNA, whereas plants germinated in continuous light express lirl at an intermediate but constant level. These results indicate that lirl expression is controlled by light and a circadian clock.

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