Development of intraxylary phloem and internal cambium in Ipomoea hederifolia (Convolvulaceae)

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dc.contributor.authorPatil, Vidya S.
dc.contributor.authorRao, K. S.
dc.contributor.authorRajput, Kishore S. [UNESP]
dc.contributor.institutionMaharaja Sayajirao Univ Baroda
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:32:27Z
dc.date.available2014-05-20T15:32:27Z
dc.date.issued2009-10-01
dc.description.abstractV. S. PATIL (Department of Botany, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002 India), K. S. RAO (BRD School of Bioscieces, S. P. University, Vallabh Vidyanagar, India), and K. S. RAJPUT (Department of Botany, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002 India). Development of intraxylary phloem and internal cambium in Ipomoea hederifolia (Convolvulaceae). J. Torrey Bot. Soc. 136: 423-432. 2009-In Ipomoea hederifolia L. (Convolvulaceae), internal/intraxylary phloem originated as isolated strands from the procambially derived cells after the formation of protoxylem and protophloem. Bands of internal phloem were apparent in the sixth internode after the development of metacambium. In the relatively thick stems several small arcs/segments of internal cambium ensues from the parenchyma cells between the protoxylem and internal protophloem. Though all the segments were active, some of them (two of them located opposite to each other) were relatively more active. Bidirectional differentiation of these segments gave rise to secondary xylem centrifugally and secondary phloem centripetally, resulting inverted vascular bundles. Rest of the internal cambium segments were unidirectional and formed only secondary phloem centripetally. Like external vascular cambium, the internal cambium was non-storied. Structurally, secondary xylem and phloem was composed of axial and radial system in which rays were mostly uni- to biseriate. Secondary xylem produced by the internal cambium was more or less similar to the xylem formed by the external successive cambia. Secondary phloem produced by the internal cambium was composed of sieve tubes, companion cells, axial and ray parenchyma cells. Simple sieve plates of internal phloem were mostly arranged on transverse end walls in contrast to compound and obliquely placed sieve plates of external phloem formed by the successive cambia.en
dc.description.affiliationMaharaja Sayajirao Univ Baroda, Fac Sci, Dept Bot, Vadodara 390002, Gujarat, India
dc.description.affiliationSP Univ, BRD Sch Bioscieces, Vallabh Vidyanagar, Gujarat, India
dc.format.extent423-432
dc.identifierhttp://dx.doi.org/10.3159/09-RA-033.1
dc.identifier.citationJournal of The Torrey Botanical Society. Lawrence: Torrey Botanical Soc, v. 136, n. 4, p. 423-432, 2009.
dc.identifier.doi10.3159/09-RA-033.1
dc.identifier.issn1095-5674
dc.identifier.urihttp://hdl.handle.net/11449/41358
dc.identifier.wosWOS:000274641600001
dc.language.isoeng
dc.publisherTorrey Botanical Soc
dc.relation.ispartofJournal of the Torrey Botanical Society
dc.relation.ispartofjcr1.119
dc.relation.ispartofsjr0,462
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectinternal cambiumen
dc.subjectinternal phloemen
dc.subjectintraxylary phloemen
dc.subjectIpomoea hederifoliaen
dc.titleDevelopment of intraxylary phloem and internal cambium in Ipomoea hederifolia (Convolvulaceae)en
dc.typeArtigo
dcterms.rightsHolderTorrey Botanical Soc

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