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1
Lectures on the Physiology of Plants
A few instances of this, illustrating the different degrees in which dorsiventrality
can be impressed upon the plant, will be of interest. We will begin with an
instance of what we may call a slightly dorsiventral organ. Sachs has observed
that the ...
2
The Diatoms: Biology & Morphology of the Genera
(b) Cymbella: slight dorsiventrality of girdle and valve: valve faces not parallel:
raphe slightly nearer the ventral margin of the valve. (c) Amphora: marked
dorsiventrality of girdle and valve: raphe displaced towards the ventral margin.
Frank Eric Round, R. M. Crawford, D. G. Mann, 1990
3
The Natural Philosophy of Plant Form
RADIALITY AND DORSIVENTRALITY leaf that full attention may not be given to
their differences. One of the most obvious of these differences is that the leaf is
dorsiventral, while the shoot is radially symmetrical. Oken was fully alive to the ...
4
The Natural Philosophy of Plant Form
The tendency to radiality and the tendency to dorsiventrality coexist both in shoot
and leaf, though the relative emphasis on these tendencies varies — the shoot
being predominantly radial, but with an underlying trend towards dorsiventrality, ...
5
Patterns in Plant Development
DORSIVENTRALITY Perhaps the most characteristic structural feature of most,
although not all, leaves is their bilateral symmetry, or dorsiventrality. Developmen
- tally the appearance of this feature is of great interest because the initially radial
...
Taylor A. Steeves, Ian M. Sussex, 1989
6
Developmental Genetics of the Flower: Advances in Botanical ...
They note that the combined expression of INO in the outer integument and PHB
in the inner integument resembles the expression of these dorsiventrality genes
in an individual leaf. They suggest that angiosperms might have acquired two ...
Most of the peculiarities of the group, as Willis points out, can be traced to the
remarkable plasticity of the skeletonless root, and to the parallel dorsiventrality of
the vegetative organs and flowers. This dorsiventrality is associated with "their ...
8
the course of evolution
In the Podostemaceae, on the other hand, the mutations showed the result of the
continual force that was acting upon them, in a dorsiventrality that on the whole
tended to be continually more and more marked the more local the genus might ...
9
Molecular Genetics of Plant Development
Because of that the dorsal surface of the developing leaf, which is adjacent to the
stem axis, is called the adaxial surface, and the ventral surface is called the
abaxial surface.) The midrib contributes to the dorsiventrality of the leaf in that the
...
Stephen Herbert Howell, 1998
10
Developmental Genetics and Plant Evolution
such constraints should be absent in genera such as Lyrella, which includes at
least one laterally asymmetrical species, because it exhibits constant cis
symmetry and thus seems preadapted to evolving dorsiventrality. In other words,
the ...
Quentin C.B. Cronk, Richard M. Bateman, Julie A. Hawkins, 2002
