Starch content of freeze-dried anthers and α-amylase activity of their extracts as criteria that dry-stored bulbs (Tulipa gesneriana, L.) cultivar ‘Apeldoorn’ have been exposed to 5°C

Gorin, N.; Heidema, Frouwke T.

doi:10.1016/0304-4238(85)90011-1

Cited by 14 publications

(4 citation statements)

References 8 publications

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“…Specific factors influence the duration and termination of dormancy in bulbs: specific proteins [ 12 , 13 ], changes in the level of gibberellins and abscisic acid [ 9 , 14 , 15 , 16 , 17 , 18 , 19 ], amylase-dependent degradation of starch [ 20 , 21 , 22 , 23 ], as well as hydration of large molecules and subsequent water release from hydrated molecules [ 23 , 24 , 25 , 26 ]. In certain cases, dormancy release leads to an increase in cell division rate [ 27 ].…”

Section: Dormancymentioning

confidence: 99%

Bulb Dormancy In Vitro—Fritillaria meleagris: Initiation, Release and Physiological Parameters

Marković

Trifunović‐Momčilov

Uzelac

et al. 2021

Plants

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In ornamental geophytes, conventional vegetative propagation is not economically feasible due to very slow development and ineffective methods. It can take several years until a new plant is formed and commercial profitability is achieved. Therefore, micropropagation techniques have been developed to increase the multiplication rate and thus shorten the multiplication and regeneration period. The majority of these techniques rely on the formation of new bulbs and their sprouting. Dormancy is one of the main limiting factors to speed up multiplication in vitro. Bulbous species have a period of bulb dormancy which enables them to survive unfavorable natural conditions. Bulbs grown in vitro also exhibit dormancy, which has to be overcome in order to allow sprouting of bulbs in the next vegetation period. During the period of dormancy, numerous physiological processes occur, many of which have not been elucidated yet. Understanding the process of dormancy will allow us to speed up and improve breeding of geophytes and thereby achieve economic profitability, which is very important for horticulture. This review focuses on recent findings in the area of bulb dormancy initiation and release in fritillaries, with particular emphasis on the effect of plant growth regulators and low-temperature pretreatment on dormancy release in relation to induction of antioxidative enzymes’ activity in vitro.

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Section: Dormancymentioning

confidence: 99%

Bulb Dormancy In Vitro—Fritillaria meleagris: Initiation, Release and Physiological Parameters

Marković

Trifunović‐Momčilov

Uzelac

et al. 2021

Plants

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“…Different genera and species demand various temperature optima, but, in general, the optimal temperature for the initial organogenesis ranges from 15 to 21 °С, while low positive temperature is required for the development of a flower stalk and well-formed flowers ( Table 1 ) [ 1 ]. This period of autumn-winter cooling seems to be extremely important for flower development, as its absence leads to slow shoot growth and severe flowering disorders [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

The Role of Temperature in the Growth and Flowering of Geophytes

Khodorova

Boitel-Conti

2013

Plants

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Among several naturally occurring environmental factors, temperature is considered to play a predominant role in controlling proper growth and flowering in geophytes. Most of them require a “warm-cold-warm” sequence to complete their annual cycle. The temperature optima for flower meristem induction and the early stages of floral organogenesis vary between nine and 25 °C, followed, in the autumn, by a several-week period of lower temperature (4–9 °C), which enables stem elongation and anthesis. The absence of low temperature treatment leads to slow shoot growth in spring and severe flowering disorders. Numerous studies have shown that the effects of the temperature surrounding the underground organs during the autumn-winter period can lead to important physiological changes in plants, but the mechanism that underlies the relationship between cold treatment and growth is still unclear. In this mini-review, we describe experimental data concerning the temperature requirements for flower initiation and development, shoot elongation, aboveground growth and anthesis in bulbous plants. The physiological processes that occur during autumn-winter periods in bulbs (water status, hormonal balance, respiration, carbohydrate mobilization) and how these changes might provoke disorders in stem elongation and flowering are examined. A model describing the relationship between the cold requirement, auxin and gibberellin interactions and the growth response is proposed.

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“…In tulip bulbs there were isolated and characterized 5lipoxygenase (Reddanna et al, 1988) and 9-lipoxygenase (Grechkin et al, 2000). Many studies concerning metabolic processes and changes in levels of some substances possibly associated with cooled tulip bulbs have been published, including changes in polyamine contents (Kollöffel et al, 1992), redistribution of organic nitrogen and carbon (Ohyama et al, 1988;Lambrechts et al, 1992), changes in the content of amino acids in anthers from tulip bulbs (Lukaszewska et al, 1989;Tonecki and Gorin, 1990), starch content and αamylase activity (Gorin and Heidema, 1985;Heidema et al, 1986), chalcones content (Franssen and Kersten, 1992), carbohydrate content (Lambrechts et al, 1994) and invertase activity (Lambrechts and Kollöffel, 1993). Physiological role of lipid metabolism in dormancy and dormancy release in tulip bulbs is unknown.…”

Section: Introductionmentioning

confidence: 99%

Possible Involvement of Lipid Peroxidation in Cooled Tulip Bulbs

Wegrzynowicz-Lesiak¹,

Kawa-Miszczak²,

Saniewski³

et al. 2005

Acta Hortic.

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Lipid peroxides and their conversion products are active in various physiological processes in growth and development. Physiological role of lipid metabolism in dormancy and dormancy release in tulip bulbs is unknown. We found in tulip leaves high level of free and bound C18:3 and C18:2 acids and small amounts of C18:1, C18:0, C16:1, C16:0, C14:0, C12:0 acids. In our studies the level of lipid peroxides was determined in leaves, anthers and basal plate of uncooled and cooled tulip bulbs 'Apeldoorn' as a concentration of MDA, using a modified thiobarbituric acid-malondialdehyde (TBA-MDA) assay. The MDA level was lower in anthers than in leaves and basal plate. During 8 weeks of bulbs storage no changes in lipid peroxidation levels were found, with the exception of 3 rd leaf at which a decrease was noted. After 8 weeks of bulbs storage, lipid peroxidation increased in all samples. However, there were no differences in MDA levels between samples from uncooled and cooled bulbs. It seems that in tulip bulbs lipid peroxidation was independent to temperature of bulbs storage. These results indicated that lipid peroxidation is probable not involved in dormancy and dormancy release in tulip bulbs.

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Starch content of freeze-dried anthers and α-amylase activity of their extracts as criteria that dry-stored bulbs (Tulipa gesneriana, L.) cultivar ‘Apeldoorn’ have been exposed to 5°C

Cited by 14 publications

References 8 publications

Bulb Dormancy In Vitro—Fritillaria meleagris: Initiation, Release and Physiological Parameters

Bulb Dormancy In Vitro—Fritillaria meleagris: Initiation, Release and Physiological Parameters

The Role of Temperature in the Growth and Flowering of Geophytes

Possible Involvement of Lipid Peroxidation in Cooled Tulip Bulbs

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