Gibberellic acid-induced cell elongation in cotton suspension cultures

Davidonis, Gayle H.

doi:10.1007/bf02041970

Cited by 12 publications

(5 citation statements)

References 11 publications

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“…by Davidonis (1990) in cotton cells. Large amounts of GA 3 (greater than 1 mg/1) inhibited cell growth, although no morphological distortions were observed (Fig.…”

Section: Discussionmentioning

confidence: 97%

Effects of gibberellic acid on hairy root cultures of Artemisia annua: Growth and artemisinin production

Smith

Weathers

Cheetham

1997

In Vitro Cell.Dev.Biol.-Plant

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Artemisinin (AN), a potent antimalarial drug that has been used for centuries as a folk remedy in China, is an effective treatment against quinine-resistant strains of Plasmodium. It can be produced through the in vitro culture of genetically transformed (hairy) roots. The effect of gibberellic acid (GA3) on the growth and secondary metabolite production of hairy roots of Artemisia annua was investigated. Six different concentrations of GA 3 were tested in shaker flasks to determine the optimum concentration. GA3 levels of 0.01-0.001 mg/l (28.9-2.89 ~tM) provided the most significant increase in biomass, and 0.01 mg/1 (28.9 laM) produced the highest amount of AN. Investigation of growth kinetics showed that the use of GA 3 at 0.01 mg/1 (28.9 ~tM) increased the growth rate of hairy roots ofA. annua by 24.9%. Thus, the cultures treated with GA s reached stationary phase faster than control cultures.

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“…by Davidonis (1990) in cotton cells. Large amounts of GA 3 (greater than 1 mg/1) inhibited cell growth, although no morphological distortions were observed (Fig.…”

Section: Discussionmentioning

confidence: 97%

Effects of gibberellic acid on hairy root cultures of Artemisia annua: Growth and artemisinin production

Smith

Weathers

Cheetham

1997

In Vitro Cell.Dev.Biol.-Plant

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“…A role for GAs in determining the polarity of cell growth has also been reported for various Abbreviations: CMT=cortical microtubule; GA=gibberellin; GA 3 = gibberellic acid; MT = microtubule; PIG = postmitotic isodiametric growth Correspondence to: F. Balu~ka cell-suspension cultures (Simmonds et al 1983;Davidonis 1990).…”

Section: Introductionmentioning

confidence: 93%

A role for gibberellic acid in orienting microtubules and regulating cell growth polarity in the maize root cortex

Baluška

Parker

Barlow

1993

Planta

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Abstract. The role of gibberellins and cortical microtubules in determining the polarity of cell growth in the root cortex of maize (Zea mays L.) was examined. Inhibition of gibberellin biosynthesis, either naturally through mutation (d5 mutant) or by means of chemicals such as 2S,3S paclobutrazol, caused thickening of root apices and increased their starch content. Immunofluorescence microscopy of cortical microtubules, coupled with a comparison of cell widhts, lengths and shapes, indicated that the meristem and immediate post-mitotic zone were the targets of gibberellin deficiency. Cortical cells in these regions were impaired in their ability to develop highly ordered transversal arrays of cortical microtubules. Consequently, the cells became wider and shorter. Application of gibberellic acid re-established the arrangements of cortical microtubules and the polarity of cell growth characteristic for roots having normal levels of gibberellins, it also decreased the starch content. These results indicate that gibberellins are morphogenetically active substances, not only in shoots but also in roots of maize.

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“…The role of auxin may be to polarise the growth of the fibre initials whereas gibberellin may be required to maintain rapid cell elongation. Gibberellin increases the length of 'bast' type fibres, such as flax, by increasing internode length (Stant 1961) but it also promotes elongation of cultured single fibre-like cells derived from epidermal callus of cotton ovules (Trolinder et all987 ;Davidonis 1991). Formation of the secondary wall is linked to cessation of elongation of the fibre cell and it has been suggested that wall deposition is triggered by a depletion in the levels of auxin.…”

Section: Control Of Differentiation In Fibre Cellsmentioning

confidence: 99%

Plant fibres: Botany, chemistry and processing for industrial use

McDougall¹,

Morrison²,

Stewart³

et al. 1993

J Sci Food Agric

138

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Abstract:Fibres from plant sources have been used by man for many generations and there is increasing interest in the potential use of such fibres from non-tree sources for various applications. This review brings together most of the relevant literature on the botany, chemistry and processing. The different cell types are explained and those which produce fibres are highlighted in conjunction with the actual plants involved. The chemistry of the plant cell wall is addressed with special consideration to the components of fibre cell walls and the biosynthesis, where known, is explained. Finally, the various methods for processing fibres into valuable industrial raw materials are detailed along with some prospective new technologies.

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Gibberellic acid-induced cell elongation in cotton suspension cultures

Cited by 12 publications

References 11 publications

Effects of gibberellic acid on hairy root cultures of Artemisia annua: Growth and artemisinin production

Effects of gibberellic acid on hairy root cultures of Artemisia annua: Growth and artemisinin production

A role for gibberellic acid in orienting microtubules and regulating cell growth polarity in the maize root cortex

Plant fibres: Botany, chemistry and processing for industrial use

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