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Transition zone between root and stem vascular system in seedlings of members of the tribe Phaseoleae (Fabaceae)
Author(s) -
Basconsuelo S.,
Weberling F.,
Kraus T.
Publication year - 2002
Publication title -
feddes repertorium
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.24
H-Index - 25
eISSN - 1522-239X
pISSN - 0014-8962
DOI - 10.1002/1522-239x(200208)113:3/4<224::aid-fedr224>3.0.co;2-v
Subject(s) - biology , botany , phloem , tribe , xylem , fabaceae , sociology , anthropology
In Rhynchosia edulis Griseb ., Rh. senna Gilles ex Hook. & Arn ., Galactia marginalis Benth ., G. latisiliqua Desv ., and Clitoria cordobensis Burkart , the “transition region” is studied to contribute information about its localization and further details about the change in the arrangement of the conducting elements. The germination of these species is cryptohypogeal and the “transition region” is entirely hypo‐cotyledonary. A tetrarch root with alternate ar‐rangement of vascular tissues is investigated. At higher level there is an intermediate arrangement and, at the cotyledonary node level, phloem and xylem elements are situated collaterally. Structural characteristics of the transition region (root‐hypocotyl‐cotyledons) studied in Rh. edulis, Rh. senna, G. marginalis, G. latisiliqua and C. cordobensis indicate that all species belonging to the tribe Phaseoleae have a similar pattern.