The Construction of Plastochron Ordered Sequences in Flower Ontogenesis

Ritterbusch, A.

doi:10.1016/s0367-2530(17)31627-4

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…In plants this can be most naturally done using plastochron number or index, which reflects time if plastochron number is constant throughout development (Erickson and Michelini 1957). We adopt this approach here, as it provides a strict temporal framework for mapping developmental events and growth patterns (Ritterbusch 1990a(Ritterbusch , 1990b; Ritterbusch and Wunderlin 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Applying the plastochron as a temporal measure to the whole of flower development, from initiation to maturity, presents two problems. First, because the floral plastochron can be quite small relative to the entire span of floral development, the number of plastochrons that need to be covered can be large (e.g., 250 in the case of foxglove (Digitalis purpurea), Ritterbusch 1990a). Secondly, many indeterminate inflorescences, such as those of Antirrhinum, eventually "peter out" and cease producing flowers, so the plastochron cannot be assumed to be constant at late stages.…”

Section: Introductionmentioning

confidence: 99%

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A temporal and morphological framework for flower development inAntirrhinum majus

Vincent¹,

Coen²

2004

Can. J. Bot.

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The entire course of flower development in Antirrhinum majus L., from initiation to maturity, is described in terms of regular time intervals. Floral meristem and bud morphology was determined by scanning electron microscopy for a sequence of 58 plastochrons. These can be grouped to define 15 stages or 7 phases of development, providing a temporal framework for gene expression and key morphological events, such as the formation of the complex corolla. The time course is also used to estimate overall growth rates of sepals and petals. Sepals initially grow at a constant rate, but growth rate gradually declines at later stages and sepal growth eventually arrests before flower development is complete. Petals initially grow at a similar rate to that of early sepals, but this growth rate is maintained for a longer period, accounting for the larger size of mature petals relative to sepals. Comparisons with Arabidopsis indicate that the duration of growth also makes an important contribution to variation in flower size.Key words: Antirrhinum, flower development, meristems, zygomorphy, developmental timing, petal.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A temporal and morphological framework for flower development inAntirrhinum majus

Vincent¹,

Coen²

2004

Can. J. Bot.

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“…the plastochron concept, still have to struggle with conceptual and practical problems (Dormer, 1972). Engaged in the comparative spatio-temporal analysis of flower ontogenesis (l~itterbusch, 1976,1980a), and occupied with the construction of age equidistant ontogenetieal sequences, we must refer to some concept of a clock (Meier~Weniger, 1977;Mittelstaedt, 1981;Ritterbusch, 1990;Ritterbusch & Wunderlln, 1989;Wunderlin, 1985Wunderlin, , 1988. Otherwise, statements on temporal patterns may easily be doomed as artifacts of irregular clocks.…”

Section: The Neglect Of Timementioning

confidence: 99%

The measure of biological age in plant modular systems

Ritterbusch

1990

Acta Biotheor

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Phytomorphology -if concerned with development -often concentrates on correlative changes of form and neglects the aspects of age, time and clock, although the plant's spatial and temporal organisation are intimately interconnected. Common age as measured in physical time by a physical process is compared to biological age as measured by a biological clock based on a biological process. A typical example for a biological clock on the organ level is, for example, a shoot.

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Reproductive Development in Seed Plants: Research Activities at the Intersection of Molecular Genetics and Systematic Botany

Rutishauser

1993

Progress in Botany / Fortschritte Der Botanik

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The Construction of Plastochron Ordered Sequences in Flower Ontogenesis

Cited by 3 publications

References 18 publications

A temporal and morphological framework for flower development inAntirrhinum majus

A temporal and morphological framework for flower development inAntirrhinum majus

The measure of biological age in plant modular systems

Reproductive Development in Seed Plants: Research Activities at the Intersection of Molecular Genetics and Systematic Botany

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