The Cotyledon in Relation to Photoperiodism in Cocklebur

Autor:	Peter R. Jennings, Robert K. Zuck
Rok vydání:	1954
Předmět:	photoperiodism Dark room food.ingredient food Botany General Earth and Planetary Sciences Epicotyl Biology Cotyledon General Environmental Science
Zdroj:	Botanical Gazette. 116:199-200
ISSN:	0006-8071
DOI:	10.1086/335862
Popis:	1. Cotyledons of cocklebur were exposed to 8-hour photoperiods either by covering the cotyledons with black cloth sleeves or by placing in a dark room plants with epicotyl removed or undeveloped. No plants so treated bloomed. 2. Plants with cotyledons exposed to 8-hour photoperiods were grafted to plants on 17-hour photoperiods; no floral initiation resulted. 3. As little as 7-8 sq. cm. of foliage leaves could produce the flowering stimulus when exposed to short photoperiods while the rest of the plant was on long photoperiods, whereas the average 9.2 sq. cm. of cotyledon area could not.
Databáze:	OpenAIRE
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