Contribution from the USDA-ARS in cooperation with the College of Agriculture and Home Economies Center. Washington Stale University, Pullman, WA, U.S.A. Scientific paper no. 7832.
Article first published online: 28 APR 2006
Plant, Cell & Environment
Volume 11, Issue 8, pages 769–775, November 1988
How to Cite
WALKER-SIMMONS, M. (1988), Enhancement of ABA responsiveness in wheat embryos by high temperature. Plant, Cell & Environment, 11: 769–775. doi: 10.1111/j.1365-3040.1988.tb01161.x
Mention of a specific product named by the United States Department of Agriculture does not constitute an endorsement and docs not imply a recommendation over other suitable products.
- Issue published online: 28 APR 2006
- Article first published online: 28 APR 2006
- Received 19 January 1988; accepted for publication 24 March 1988
- abscisic acid;
- hormone response;
- preharvest sprouting;
Abstract. Mature wheat (Triticum aestivum L.) grain often possesses high-temperature dormancy which restricts the grain from germinating at warm temperatures (25–30°C). Isolated embryos from such grain exhibited little high-temperature dormancy when germinated in water. Dormancy was restored by the application of abscisic acid (ABA) to the embryos. The ability of ABA to block germination in isolated embryos was enhanced significantly by elevating the germination temperature. ABA was 100 times more effective in reducing embryonic germination at 30°C than at 15°C. These temperature effects on embryonic response to ABA are a useful system for studying the mechanism of ABA action in seed dormancy.