Apical Dominance and Correlations by Hormones

Hillman, J. R.

doi:10.1007/978-3-642-71018-6_44

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…Ethylene is known to affect or control many growth and development processes including apical dominance (Abeles t973;Hillman 1986), lateral bud growth (Yeang & Hillman 1982;Van Dijck et al 1988) and adventitious bud formation (Huxter et al 1981;Van Aartrijk et al 1986), which constitute the basic phenomena of plant propagation by in vitro culture (Gaspar 1988). The role of ethylene biosynthesis in in vitro adventitious bud formation has been assessed (Huxter et al 1981;Van Aartrijk et al 1986;Robinson & Adams 1987;Kumar & Thorpe 1989) with some positive results.…”

Section: Introductionmentioning

confidence: 99%

The influence of ethylene on proliferation and growth of rose shoot cultures

Kevers

Boyer

Courduroux

et al. 1992

Plant Cell Tiss Organ Cult

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Ethylene accumulation in four different rose in vitro culture containers was evaluated. Multiplication rate was the highest, and axes most elongated, in the two containers where ethylene accumulation was limited. Pulse treatments of ethylene at various concentrations enhanced proliferation depending on concentration (5 ppm generally was the most favourable) and time of application, while reducing elongation of the shoots. An ethylene trap in the flask atmospheres of the cultures reduced rose shoot proliferation rate but increased elongation of the axes. Inhibitors of ethylene biosynthesis, aminoethoxyvinylglycine (AVG) and cobalt chloride (COC12), increased multiplication rate by providing a higher number of axes of a suitable size for subculture. The ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) had a beneficial effect on multiplication rate, although reducing longitudinal growth of the axes.

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Section: Introductionmentioning

confidence: 99%

The influence of ethylene on proliferation and growth of rose shoot cultures

Kevers

Boyer

Courduroux

et al. 1992

Plant Cell Tiss Organ Cult

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“…Therefore,, correlative signals transported from dominant to inhibited organs are required to explain the observed effects. Unlike apical dominance, in which IAA apparently is accepted as the primary bnt indirect signal (Phillips 1975, Hillman 1986), comparatively little research has been done with fruits to elucidate the nature of correlative inhibiting substances. Dominance among fruits can be observed in basipetal but also in apical or distal directions (see below).…”

Section: Introductionmentioning

confidence: 99%

Diffusible IAA and dominance phenomena in fruits of apple and tomato

Gruber¹,

Bangerth²

1990

Physiologia Plantarum

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1990. Diffusible IAA and dominance phenomena in fruits of apple and tomato -Physiol. Plant 79: 354-358.The relationships between indole-3-acetic acid (IAA) diffusing out of the fruit and competition among fruits, and between fruits and shoot tips were investigated using apple (Mains domestica Borkh. cv. Jonagold) and tomato {Lycopersicon esculentum Miii.) piants. Dominant fruits always had more diffusible IAA than subordinated, inhibited fi'uits. Alterations in dominance -by fruit-or shoot tip removal -led to significant changes in diffusible IAA by the remaining fruits. This chalnge could be detected one day after dominance modification. It is suggested that diffusible IAA is involved in the correlative signal regulating dominance relationships between fruits, and between fruits and shoots in apple and tomato.

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“…Many reports support the fundamental role of naturally occurring IAA on apical dominance: its synthesis and its polar transport are the clues about the mechanism of its control (4,5,21). Our data have clearly indicated that not only IAA, but also CKs, played a key role in the regulation of bud growth.…”

Section: Discussionmentioning

confidence: 99%

Hormone Levels and Apical Dominance in the Aquatic Fern Marsilea drummondii A. Br

Pilate¹,

Sossountzov²,

Miginiac³

1989

Plant Physiol.

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Terminal buds and successively subjacent lateral buds of the water fem, Marsilea drummondii, were examined to determine the pattem of hormone distribution in relation to apical dominance. Quantitative levels of indole-3-acetic acid (IAA), abscisic acid (ABA), zeatin and zeatin riboside (Z and ZR), and isopentenyladenosine (iPA) were determined by a solid-phase immunoassay using polyclonal antihormone antibodies. Enzyme-linked immunosorbent assay was used following a one-step HPLC purification procedure to obtain the free hormones. Active shoot apices contained the most IAA and Z-type cytokinins and inhibited buds the least. No significant differences in ABA levels were found leading to the conclusion that ABA did not play any role in apical dominance. The normal precedence of the most rapid outgrowth of the youngest inhibited bud as observed previously in decapitated plants was well correlated with its very high level of iPA observed in this study. The same phenomenon was observed in the median buds but with a weaker amplitude. The presence of this storage form could indicate that a bud at its entry into quiescence eventually looses the ability to hydroxylate iPA to Ztype cytokinins when it is fully inhibited. IAA and Z + ZR are concluded to be essential for lateral bud growth.

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Apical Dominance and Correlations by Hormones

Cited by 7 publications

References 27 publications

The influence of ethylene on proliferation and growth of rose shoot cultures

The influence of ethylene on proliferation and growth of rose shoot cultures

Diffusible IAA and dominance phenomena in fruits of apple and tomato

Hormone Levels and Apical Dominance in the Aquatic Fern Marsilea drummondii A. Br

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