Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 54, Issue 381, Pages 335-344Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erg024
Keywords
club-mosses; ferns; roots; seed plants; xyloglucan endotransglucosylase/hydrolase (XTH)
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The endotransglucosylase action of the enzyme xyloglucan endotransgiucosylase/hydrolase (XTH) was localized in the roots of diverse vascular plants: club-mosses (lycopodiophytes), ferns, gymnosperms, monocots, and dicots. High action was always found in the epidermis cell wall of the elongation zone and in trichoblasts in the differentiation zone. Clearly XTH and its action in root development evolved before the evolutionary divergence of ferns and seed plants and also of the lycopodiophytes and euphyllophytes.
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