The Anatomy of the Buds of Coniferae

Lewis, Francis J.; Dowding, Eleanor Silver

doi:10.1093/oxfordjournals.aob.a089891

Cited by 32 publications

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“…In winter, the ratio is 0.4 and it increases to 0.5-0.6 in midAugust. (Lewis and Dowding, 1924;Korody, 1938;Camefort, 1956;Anikeeva and Minina, 1959;Fraser, 1966;Schüepp, 1966;Owens and Molder, 1976;Owens et al, 1977; Pillai and Chacko, 1978;Tompsett, 1978;Harrison and Owens, 1983;Skupchenko, 1984;and …”

Section: Methodsmentioning

confidence: 99%

Structure and development of vegetative buds, from the lower crown of Picea abies

Hejnowicz

Obarska

1995

Ann. For. Sci.

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Section: Methodsmentioning

confidence: 99%

Structure and development of vegetative buds, from the lower crown of Picea abies

Hejnowicz

Obarska

1995

Ann. For. Sci.

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“…The crown, a peculiar anatomical structure found in the buds of several genera of the Coniferales such as Abies, Cedriis, Larix, Pseudotsuga, Ficea, Sequoia, Taxiis, Torreya, and Tsuga (Venn 1965), has been described as a layer of four to seven extremely thick-walled cells separating the mature portion of the previous year's shoot from the young tissues of the bud (Lewis and Dowding 1924). Several terms denoting the same structure have been applied by other authors, including "Kollenchymplatte" (Korody 1937) and nodal diaphragm (Venn 1965).…”

Section: Introductionmentioning

confidence: 99%

Morphogenesis in dormant embryonic shoots of Picea abies: Influence of the crown and cold treatment

Jansson

Bornman

1983

Physiologia Plantarum

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Retention of the crown, a plate of homogeneously thickened collenchymatous cells at the base of the embryonic shoot of Picea abies (L.) Karst., has marked effects on the induction of adventitious buds from the needle primordia. These effects were observed on embryonic shoots of three clones which were cold‐treated at 4 ± 1°C for nil, two, four and six months; and then excised either with or without the crown, before subculturing either directly on a medium lacking plant growth regulators or after application of 125 μM benzyladenine (BA) as a 3‐h pulse. Embryonic shoots retaining the crown and treated with BA responded reproducibly better than those lacking it. This was true both for the number of shoots that produced adventitious buds and for the numbers of adventitious buds per shoot. Differentiation of as many as five adventitious buds in a single needle primordium was observed, with development occurring nearly twice as early (7 as compared with 12 weeks) in the presence as in the absence of the crown. The response decreased progressively with increasing exposure to cold treatment. A number of anatomical changes occurred during culture in vitro. After 3 to 4 weeks a band of sclerenchymatous cells commenced differentiation at the centre of the crown. In embryonic shoots without the crown, a tissue which was identified as a wound periderm formed at the excision surface. Vascular unions were observed between the tissues of the newly — formed shoots induced from the needle primordia and those of the original shoot explants.

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“…Maximum development occurs ment for 1st-and 2nd-year seedlings from 47 on the 0lympic peninsula of and on different provenances and showed that vegetative the Queen Charlotte Islands of British Columbia bud burst in the spring was (Fowel]s 1965). Anatomical studies of vegetative bud development have been made for some species of Picea (Lewis and Dowding 1924;Korody 1937 ;Camefort 1956;Fraser 1962Fraser , 1966Romberger 1966;Cecich et al 1972). Burley (19666) showed that when from northern provenances.…”

Section: Introductionmentioning

confidence: 99%

Bud development in Sitka spruce. I. Annual growth cycle of vegetative buds and shoots

Owens¹,

Molder²

1976

Can. J. Bot.

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Vegetative apices of Picea sitchensis (Bong.) Carr. were studied throughout the annual growth cycle. Apices became mitotically active late in March and the shoot axis and leaf primordia elongated causing the bud to swell. New axillary apices were initiated in mid-April and the terminal apex and new axillary apices initiated bud scales until early in July. Vegetative bud burst occurred early in June and shoot elongation was completed by mid-July. The end of shoot elongation coincided with the onset of leaf initiation. The change from bud-scale to leaf initiation was characterized by a period of increased mitotic activity and rapid apical growth. About half of the final number of leaves were initiated during the early period of rapid leaf initiation. The remaining leaf primordia were initiated more slowly over the next 3 months. Buds became dormant by mid-November.

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The Anatomy of the Buds of Coniferae

Cited by 32 publications

References 0 publications

Structure and development of vegetative buds, from the lower crown of Picea abies

Structure and development of vegetative buds, from the lower crown of Picea abies

Morphogenesis in dormant embryonic shoots of Picea abies: Influence of the crown and cold treatment

Bud development in Sitka spruce. I. Annual growth cycle of vegetative buds and shoots

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