KSIĄŻKI POWIĄZANE ZE SŁOWEM «MICROSPORANGIA»
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1
The Anther: Form, Function, and Phylogeny
2) of transectional shapes that uses position of microsporangia in conjunction
with shapes of the stamen surfaces to identify categories. Ovoid (laminar) anthers
have facially positioned microsporangia (or microsporangia at the corners of ...
William G. D'Arcy, Richard C. Keating, 1996
The sporophylls in turn are aggregated to produce the male strobilus. In
angiosperms, the microsporangia arise in the male organ of the flower, known as
the stamen. A stamen commonly consists of an anther containing four
microsporangia, ...
A. K. Shukla, M. R. Vijayaraghavan, B. Chaudhry, 1998
3
Developmental Genetics and Plant Evolution
two microsporangia embedded in its tissues, yielding a total of four
microsporangia per stamen. Common modifications reflect loss of one theca or
loss of one microspo- rangium in each theca, resulting in stamens bearing two
microsporangia.
Quentin C.B. Cronk, Richard M. Bateman, Julie A. Hawkins, 2002
It is important to note, however, that in Degeneria, Galbulimima, Lactoris,
Annonaceae, Belliolum (Winteraceae) and Lirio- dendron the microsporangia
occupy the abaxial surface (and therefore the stamens are extrorse), whereas in
the ...
STAMEN S A distinctive apomorphy for the angiosperms is the stamen, the male
reproductive organ of a ower. Stamens are interpreted as modi ed
microsporophylls, modi ed leaves that bears microsporangia (see Chapter 5).
Microsporangia ...
6
Organography of Plants: Special organography
(a) MICROSPORANGIA OF THE GYMNOSPERMAE. The structure of the
microsporangia of the Gymnospermae links on closely to that of the sporangia of
the Pteridophyta, in that the outermost layer of their sporangial wall shows the
same ...
7
Philosophical Transactions of the Royal Society of London: ...
The microsporangia of Crossotheca Hiininghausi are distinguished from those of
T elangium Scotti by the following differences, which are shown underneath in
tabular form :— Crossot/wm Hiininghausi. Microsporangia free, borne upon a ...
These cone scales are the sporophylls, and each scale bears on its surface the
sporangia. In most gymnosperms , the microsporangia and megasporangia are
borne on separate cones. In the conifers, both male and female cones are borne
...
Research & Education Association Editors, Research and Education Association, 2013
9
Morphology of angiosperms: (Morphology of spermatophytes. ...
willows, notably Salix petiolaris, in which Chamberlain 16 found microsporangia
in the " placenta " of the ovary, the carpel sometimes being wide open and
bearing both microsporangia and \ ' FIG. 6.— Salix petiolaris. A, microsporangia
in wall ...
John Merle Coulter, Charles Joseph Chamberlain, 1919
10
Botany For Degree Pteridophyta
Each sorus bears both mega and microsporangia. The former are short-stalked
and are arranged in a row at the tip of the receptacle, whereas the latter are long
stalked and arise on the sides. Their number in a sorus varies with species.
