Plant Physiol. Drug Metab Dispos
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Plant Physiology 73:899-901 (1983)
© 1983 American Society of Plant Biologists

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Articles

Early Events in Maize Seed Development 1

1-Methyl-3-phenyl-5-(3-[trifluoromethyl]phenyl)-4-(1H)-Pyridinone Induction of Vivipary

Franklin Fong2, James D. Smith and Don E. Koehler3

Department of Plant Sciences, Texas A & M University, College Station, Texas 77843

Preharvest sprouting or vivipary is induced in developing maize (Zea mays, inbred Tx 5855 and Va 35) seeds by fluridone, a pyridinone inhibitor of carotenoid biosynthesis. Fluridone has a maximal effect on vivipary at 11 days after pollination (DAP) and little effect at 13 DAP in the inbred maize line Tx 5855. Abscisic acid partially reversed the chemically induced vivipary. Though the precise mechanism of fluridone-induced vivipary is unknown, these results indicate that there are important developmental changes occurring at 11 DAP which reversibly commit the immature embryo to vivipary or dormancy.

2 To whom correspondence should be sent.

3 Present address: Department of Food and Agriculture, 1220 North A400, Sacramento, CA 95814.

1 Supported by a grant from United States Department of Agriculture Competitive Grants Program No. 79-59-2488-1-1-370-1. This is journal article No. TA18877 from the Texas Agricultural Experiment Station.




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Copyright © 1983 by the American Society of Plant Biologists