Portal de Periódicos da CAPES

THE TIME AND SITE OF THE SEMIDOMINANT LETHAL ACTION OF “Wo” IN LYCOPERSICON ESCULENTUM

1962; Wiley; Volume: 49; Issue: 4 Linguagem: Inglês

10.1002/j.1537-2197.1962.tb14955.x

1537-2197

Pingping Huang, Elton F. Paddock,

Seed Germination and Physiology

H uang , P. C. (California Inst. Technol., Pasadena), and E. F. P addock . The time and site of the semidominant lethal action of “Wo” in Lycopersicon esculentum. Amer. Jour. Bot. 49(4): 388–393. Illus. 1962.—The semidominant lethal gene, Wo (Woolly), in Lycopersicon esculentum has been investigated with specific attention to its lethal action. The primary lethal action is believed to occur prior to the torpedo stage of embryonic development (approximately 22 days after anthesis). The presumed WoWo embryos cease to grow before any cambial differentiation or organogenesis can be recognized. Their accompanying endospermous cells, however, continue to divide, this resulting in full‐sized seeds. The death of these embryos probably occurs near the time of maturation of the seeds (approximately 52 days after anthesis or when the ovulary turns orange‐red). The mechanism of death of the embryo apparently lies in and is specific to the embryo; hence, this is a case of autogenously determined embryonic lethality.