Polarity Phenomena in Seakale Roots

Jones, W. Neilson

doi:10.1093/oxfordjournals.aob.a089954

Cited by 13 publications

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“…resulted in the formation of very little callus and inhibited the developmenlt of buds. JONES (11) found that a local inierease of temperature as little as 2°C. iniduced the formation of buds on the lower enids of sea kale segmenits where roots ordi-narily would have developed.…”

Section: Methodsmentioning

confidence: 99%

Factors Affecting Regeneration of the Horseradish Root

Lindner

1940

Plant Physiol.

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Section: Methodsmentioning

confidence: 99%

Factors Affecting Regeneration of the Horseradish Root

Lindner

1940

Plant Physiol.

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“…Root cuttings of C. maritima have been widely used for hormone and polarity investigations (Jones ; Priestley & Swingle ; Stoughton & Plant ; Plant ; Camus ) and have shown strong stem and root polarity. If 5‐ to 10‐cm‐long root cuttings are allowed to regenerate while lying in a horizontal position, the cut surfaces at both ends develop callus which produces buds from the shoot‐apex end and roots from the root‐apex end in the course of 2 or 3 weeks.…”

Section: Structure and Physiologymentioning

confidence: 99%

“…If 5‐ to 10‐cm‐long root cuttings are allowed to regenerate while lying in a horizontal position, the cut surfaces at both ends develop callus which produces buds from the shoot‐apex end and roots from the root‐apex end in the course of 2 or 3 weeks. This polarity is maintained when the cuttings are placed vertically in the reversed position with the root‐apex end upwards (Jones ). Expression of this polarity is slightly affected by gravity and to a greater extent by centrifugal force.…”

Section: Structure and Physiologymentioning

confidence: 99%

“…Short lengths of root, 2 mm or less in length, always produce shoot buds from both ends, but roots from one end only. If conditions are otherwise favourable for bud development, it takes place in regions where processes like respiration and metabolic activity are most vigorous (Jones ) and the differentiation of meristematic tissue is determined, in part, by specific concentrations of growth substance, a relatively high and low concentration of growth substance influencing root and bud production, respectively (Plant ). A local rise of temperature by 2 °C is sufficient to make the warmed region of the cutting dominant so far as shoot production is concerned, even though the region in question occupies the root‐apex end of the cutting (Jones ).…”

Section: Structure and Physiologymentioning

confidence: 99%

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Biological Flora of the British Isles:Crambe maritima

Sanyal

Decocq

2015

Journal of Ecology

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Summary1. This account presents information on all aspects of the biology of Crambe maritima L. (Sea-kale; Crambe pontica Stev. ex Rupr) that are relevant to understand its ecological characteristics and behaviour. The main topics are presented within the standard framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characters, herbivores and disease, history and conservation. 2. Crambe maritima is found predominantly on southern and western coasts of Britain but also in Scotland, Ireland and elsewhere. It occurs primarily on neutral or slightly alkaline soils on shingle and sand beaches above the drift line, out of reach of average high tides. Equinoctial tides or storms can increase soil salinity, requiring it to be salt tolerant. 3. Crambe maritima is a rosette plant with a fleshy taproot, which is the main perennating organ with a capacity for vegetative propagation. Flowering can take 5-8 years when grown from seeds. Reproduction is predominantly by seeds. Root and stem cuttings can be used for vegetative propagation. In winter, each branch ends at ground level in a leafless crimson bud, and in spring, it produces a succession of cabbage-like leaves just above ground level, the first being purple and successive leaves becoming greener. 4. Crambe maritima produces weakly protogynous hermaphrodite flowers. Self-and cross-pollination occurs. Pollination is by insects, flies and bees. The plants usually produce 1000-10 000 seeds per year. 5. In Britain, Crambe maritima has been reported to have declined in certain areas but increased in other areas and currently does not have rare or scarce status. There has been an expansion in range in Ireland since the 1960s as it has been recorded at new sites, and while the species has disappeared from some sites in France, it has also been identified in several new sites.

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Die Georeaktionen der Pflanze

Zimmermann

1927

Ergebnisse Der Biologie

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Polarity Phenomena in Seakale Roots

Cited by 13 publications

References 0 publications

Factors Affecting Regeneration of the Horseradish Root

Factors Affecting Regeneration of the Horseradish Root

Biological Flora of the British Isles:Crambe maritima

Die Georeaktionen der Pflanze

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