heteroblastic


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Related to heteroblastic: heteroblasty

heteroblastic

[¦hed·ə·rō¦blas·tik]
(embryology)
Arising from different tissues or germ layers, in referring to similar organs in different species.
(petrology)
Pertaining to rocks in which the essential constituents are of two distinct orders of magnitude of size.
References in periodicals archive ?
n+1] foliations as elongated prismatic to tabular individuals of subidioblastic and heteroblastic character, with pale green color and slight pleochroism from yellowish green to bluish green.
n+1] foliations, developing colorless columnar individuals of irregular borders, and xenoblastic and heteroblastic character.
Thus, gradual changes in leaf shape in species of, for example, the fern genus Matonia (Matoniaceae) are described as heteroblastic (Kato & Setoguchi, 1998) but they occur change along the same axis.
This hypothesis is supported by the ontogenetic changes in leaf anatomy observed in the more heteroblastic Eucalyptus species, which shift from soft juvenile leaves with loosely packed cells to leathery adult leaves with tightly packed cells (Johnson 1926, Penfold and Willis 1961, Cameron 1970).
Heteroblastic leaf development in Acacia: Morphological and morphogenetic implications.
when it comes to the use of the terms heteroblastic vs.
The three different measures of developmental stability used in this study (within-plant variance in leaf length, variance around a heteroblastic pattern, and FA) all showed a trend for the selfing, more homozygous populations to be less developmentally stable.
The difference in leaf blade shapes produced at different phases of ontogeny indicates that sororia is heteroblastic, meaning that these differences in blade shape are genetically programmed changes in shoot components that occur as a normal expression of the plant's ontogeny (Goebel, 1900; Allsopp, 1965, 1967; Kaplan, 1973).
For example, heterophylly in pteridosperms may be an expression of heteroblastic development in which the smaller fronds may have come from juvenile plants.
radicans is thus a vine of the type described by Lee and Richards (1991) in which heteroblastic changes occur as branches without adventitious roots extend away from the juvenile form's support.
Similar results have been found in Pseudopanax crassifolius (Araliaceae), a heteroblastic tree, in which leaf size and shape differ greatly between juvenile and mature shoots.
In both Alismatales and Nymphaeales there is a remarkably similar heteroblastic progression of linear to laminar to broadly ovate or peltate leaves.