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epicotyl

A Dictionary of Biology | 2004 | Copyright

epicotyl The region of a seedling stem above the stalks of the seed leaves (cotyledons) of an embryo plant. It grows rapidly in seeds showing hypogeal germination and lifts the stem above the soil surface. Compare hypocotyl.

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Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

	Epicotyl Dormancy in Viburnum acerifolium (Caprifoliaceae) Magazine article from: The American Midland Naturalist Hidayati, Siti N; Baskin, Jerry M; Baskin, Carol C April 1, 2005 700+ words ...underdeveloped linear embryos and deep simple epicotyl morphophysiological dormancy. Seeds...regime for both rate and percentage of epicotyl emergence was 15/6 C. For seeds planted...greenhouse in November 1998, rate of epicotyl emergence peaked in early January 2000...
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	Studies from University of Kentucky yield new data on seed science. Newspaper article from: Agriculture Week December 4, 2008 700+ words ...4 weeks). After radicle emergence, epicotyl emergence was delayed 1-8 weeks, depending...stratification was not required to break PD of the epicotyl. Unlike seeds of many previously studied...level of MPD called non-deep, simple, epicotyl MPD has been identified." Baskin and...
	Occurrence of cello-oligosaccharides in the apoplast of auxin-treated pea stems Magazine article from: Plant Physiology Tominaga, Rumi; Samejima, Masahiro; Sakai, Fukumi; Hayashi, Takahisa January 1, 1999 700+ words ...polysaccharides. In pea (Pisum sativum L.) epicotyl segments, Labavitch and Ray (1974...and xyloglucan. Auxin-treated pea epicotyl segments have been used because of xyloglucan...3 cm in length (7 d after sowing), epicotyl segments (10 mm long) were excised...
	Research from X.P. Zou et al has provided new information about plant sciences. Newspaper article from: Life Science Weekly August 12, 2008 700+ words ...shoot organogenesis. Stable transformants were obtained from epicotyl segments infected with Agrobacterium strain EHA 105 harboring...acetic acid (IAA) was used to improve callus formation from epicotyl segments after transformation. A two-step selection strategy...
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	REPETITIVE SOMATIC EMBRYOGENESIS AND PLANT REGENERATION IN ZIZYPHUS JUJUBA MILL. Magazine article from: In Vitro Cellular & Developmental Biology Kim, Y W; Moon, H K; Son, S G May 1, 2006 700+ words ...at 25 1C for 2wk was the best treatment for germination with epicotyl elongation and root development. Of over 256 plants regenerated...6%) survived. Key words: Chinese date; desiccation; epicotyl elongation; germination: root development. INTRODUCTION...
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Related entries from encyclopedias, dictionaries, and thesauruses

	epicotyl Book article from: A Dictionary of Plant Sciences epicotyl The part of a seedling above the cotyledons ; it will develop into the shoot.
	germination Book article from: The Columbia Encyclopedia, Sixth Edition ...radicle) of the rudimentary root (hypocotyl) emerges first and then the growing tip (plumule) of the rudimentary shoot (epicotyl). Food stored in the endosperm or in the cotyledons provides energy for the early stages of this process, until the seedling...
	hypocotyl Book article from: A Dictionary of Biology ...grows rapidly in seedlings showing epigeal germination and lifts the cotyledons above the soil surface. In this region (the transition zone ) the arrangement of vascular bundles in the root changes to that of the stem. Compare epicotyl .
	brassin Book article from: A Dictionary of Biology ...from various species. Extracts behave in a manner similar to auxins , for example stimulating elongation of hypocotyl and epicotyl tissue from seedlings when applied at concentrations as low as 10 –7 mol dm –3 . However...
	embryo Book article from: The Columbia Encyclopedia, Sixth Edition ...the divisions of the fertilized ovum and the differentiation of the tissues to form the embryonic root (hypocotyl), stem (epicotyl), and leaves ( cotyledons ) occur inside the ovule within the ovary at the base of the pistil. The matured ovule is the...