+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The ontogeny of the vascular cambium in hoheria angustifolia

New Phytologist 77(2): 409-420

The ontogeny of the vascular cambium in hoheria angustifolia

The procambium in H. angustifolia (Malvaceae) develops behind the apical meristem as an almost complete cylinder of meristematic cells. Differentiating protophloem strands are separated by narrow interfascicular sectors. These sectors also interrupt the procambial cylinder. The 1st protoxylem elements differentiate as discrete bundles to the inside of a number of protophloem strands and remain separated from them by an actively dividing procambial cylinder 6-8 cells wide. Periclinal divisions also occur in the interfascicular sectors so that by the center of the 1st internode below the shoot tip the procambium forms a complete cylinder. In this way the short cells of the interfascicular sectors become transformed into primordial ray initials. Repeated periclinal division in the procambium leads to the radial seriation of its cells. Subsequent differentiation of the derivatives produces complete cylinders of metaxylem and metaphloem by the 3rd internode. Internodal elongation ends by the 5th or 6th internode below the shoot tip after which the transverse ended primordial fusiform cells of the procambium become transformed into fusiform cambial cells with pointed tips. Except during ray formation, transverse division ceases and the non-storied cambium gradually acquires a storied appearance in tangential view by repeated radial longitudinal divisions accompanying radial growth. The 1st new rays appear about the 7th internode. The transition from procambium to cambium in H. angustifolia is a graudal one with the meristem acquiring some cambial characteristics before and some after internodal elongation has ceased.

(PDF same-day service: $19.90)

Accession: 006728341

DOI: 10.1111/j.1469-8137.1976.tb01530.x

Related references

The ontogeny of the vascular cambium in the stem of seed plants. Biol. Rev, 40: 4, 534-79, 1965

Early ontogeny of a vascular cambium I. Ginkgo biloba. Botanical Magazine, Japan 85(998): 111-124, 1972

The ontogeny of the vascular cambium in ginkgo biloba roots. International Botanical Congress Abstracts 17: 248, 1987

Early ontogeny of vascular cambium part 1 ginkgo biloba. Botanical Magazine (Tokyo) 85(998): 111-124, 1972

Variation in the size of fusiform cambial initials and vessel members in Hoheria angustifolia Raoul. New Zealand Journal of Botany 11(3): 391-410, 1973

Early ontogeny of vascular cambium in the seedling roots of acer saccharinum l. Korean Journal of Botany 34(4): 311-316, 1991

Early ontogeny of vascular cambium III. Robinia pseudoacacia and Syringa oblata. Botanical Magazine, Japan 87(1006): 99-112, 1974

Early ontogeny of vascular cambium. II. Aucuba japonica and Weigela coraeensis. Journal of Plant Research 87(1): 17-32, 1974

Ontogeny of the pro cambium and cambium in doxantha unguis cati d bignoniaceae d. XI International Botanical Congress : 47, 1969

Early ontogeny of vascular cambium in cotyledonary node of Ginkgo biloba L. seedlings. Korean Journal of Botany 35(4): 359-364, 1992