Amaryllidaceae: Geophytic Growth, Development, and Flowering

Theron, Karen I.; Hertogh, A. A. De

doi:10.1002/9780470650783.ch1

Cited by 5 publications

(7 citation statements)

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“…There appears to be a requirement for approximately five to seven leaves to be formed between successive flower primordia and, in floweringsized bulbs dissected in spring, it is possible to distinguish two, or sometimes three, developing flower buds that are at different stages of development (Rees 1985;Warrington et al 1989;Vishnevetsky et al 1997). The development sequences for a number of other members of the Amaryllidaceae have been described in detail (Theron & de Hertogh 2001).…”

Section: Discussionmentioning

confidence: 99%

“…N. sarniensis, like other genera from within the Amaryllidaceae that originate in regions with dry, warm summers (such as Amaryllis belladonna, Narcissus spp. and N. flexuosa), have been shown to require warm storage temperatures during summer, whereas cool storage temperatures are required for those genera with cool temperatures in their natural centres of origin (such as N. bowdenii, hardy Narcissus and Haemanthus) (Theron & de Hertogh 2001).…”

Section: Introductionmentioning

confidence: 99%

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Lifting time and bulb storage temperature influenceNerine sarniensisflowering time and flower quality

Warrington

Brooking

Fulton

2011

New Zealand Journal of Crop and Horticultural Science

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Flowering in Nerine sarniensis was manipulated by a combination of lifting dates and storage temperature treatments. Bulbs were lifted in either October (late spring) or December (early summer) then either replanted immediately (control) or stored at 38C or 308C for 4 or 8 weeks before replanting. For bulbs that were lifted in October and stored at 308C for either 4 or 8 weeks, flower bud emergence occurred 27Á29 days earlier than bulbs from the control treatment, whereas for those stored at 38C, flower bud emergence was delayed by up to 23 days. In contrast, for bulbs lifted in December and stored at 308C, flower buds emerged at a similar time to the control, whereas those stored at 38C were delayed by up to 41 days. Subsequent development from flower bud emergence to first floret opening was primarily influenced by the prevailing temperature conditions in all treatments, with 92% of the variation being accounted for by soil temperature alone. The proportion of bulbs that flowered was not markedly altered by storage conditions except that it was reduced where bulbs were stored at 38C for 8 weeks at the December lifting time. Flower quality (stem length, floret number) was not markedly impacted by the treatments used.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lifting time and bulb storage temperature influenceNerine sarniensisflowering time and flower quality

Warrington

Brooking

Fulton

2011

New Zealand Journal of Crop and Horticultural Science

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“…The comparatively short flowering period of A. belladonna, which predictably lasts between six and nine weeks, is a significant shortcoming despite the species' promising allure. In addition, once a critical bulb size is attained, each bulb pro-duces only a single inflorescence per season and often encounters a capricious flowering disposition [12,14,19], limiting its marketable application as an influential cut flower and potted plant under the tight parameters of the traditional floriculture trade (Figure 1A,B).…”

Section: Introductionmentioning

confidence: 99%

“…Although organogenesis of bulb dormancy is an ecological adaptation that allows plant species to survive unfavourable climatic conditions below the soil surface, it provides a favourable stage for handling, treatment, and shipping [31]. Depending on their natural phenological growth conditions, different taxa require different successive temperature regimes to pass through certain developmental stages to flowering [12,25,32]. Mediterranean geophytes' annual rhythmic cycles typically follow a warm-cold-warm cycle.…”

Section: Introductionmentioning

confidence: 99%

Warm Bulb Storage Optimises Flowering Attributes and Foliage Characteristics in Amaryllis belladonna L.

Wilmot,

Jimoh,

Laubscher

2023

Horticulturae

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Amaryllis belladonna is an autumn-flowering bulbous geophyte endemic to the Western Cape, South Africa. The species’ erratic flowering disposition and brief flowering period upon maturity limit its economic productivity and competitiveness within the traditional genera of cut flowers and potted plants. However, it can be an attractive, eco-friendly, seasonal addition to the specialty floriculture market. A 10-month study evaluated the effects of a warm storage period on A. belladonna bulbs’ flowering yield, flowering time, quality characteristics, and foliage growth. The experiment comprised dormant flower-sized bulbs randomly assigned to one of six storage regimes of either a 0- (no storage control), 4-, 6-, 8-, 10-, or 12-week interval periods at a continuous warm temperature of 23 ± 1 °C before planting into pots between mid-November 2021 and mid-February 2022 in the greenhouse. The results showed that flowering production (64.3% flowering after the 12-week storage), flowering time (anthesis occurring 9 days after the 10- and 12-week storage), and quality attributes (number of florets in the inflorescence, scape diameter, inflorescence fullness ratio, and pot longevity) of A. belladonna scapes were significantly impacted by warm bulb storage, but not foliage growth. Irrespective of bulb storage, inflorescence abortion occurred. An extended bulb storage did not advance the flowering time despite a greater harvest and shorter cultivation periods after planting. This study established that a cumulative temperature range during bulb dormancy is crucial for supporting the A. belladonna inflorescence maturity’s energetic demands and the opening of floret buds. Bulbs should be stored at elevated temperatures for at least 8–10 weeks to attain the best floret-quality attributes and longevity. However, for an economical and sustainable greenhouse and specialty cut flower production, 12-week warm bulb storage is recommended to achieve the optimal anthesis in the shortest interval for this seasonal single-harvest species after planting.

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“…These have general tendency to bloom after a heavy rain therefore named as rain lily. The flowers of this genus are solitary, declinate, point straight upward and have equal stamen length [3,7,8]. Seeds are D-shaped or wedge shaped.…”

Section: Morphology and Taxonomymentioning

confidence: 99%