KSIĄŻKI POWIĄZANE ZE SŁOWEM «ARCHESPORIUM»
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1
morphology of angiosperms
Fischer 18 describes a several-celled archesporium in Helianthemum,
Guignard17 an occasional two-celled archesporium in Capsella, and Treub 1H a
two-celled archesporium in Loranthus and one of four or five cells in Yiscum,
while it has ...
John Merle Coulter And Charle Joseph Chamberlain, 1987
2
Text Book of Botany: Angiosperms
But multicellular archesporium is not uncommon an occurs in several families
such as Fagaceae, Apiaceae, Salicaceae, Ranunculaceae, Poaceae and
Liliaceae. All the cells of a multicellular archesporium are rarely functional (Fig.
14A-C).
Dr. Singh, Dr. Pande & Dr. Jain
3
The Embryology Of Angiosperms, 5E
MEGASPOROGENESIS. A single hypodermal cell in the nucellus functions as
the archesporium (Fig. 6.8). It becomes more prominent than its surrounding cells
because of its large size, dense cytoplasm and large nucleus.
S P Bhatnagar S S Bhojwani, 2009
4
Cmplt Biology For Medical Ent Exams
Archesporium in an ovule is (a) single celled and hypodermal in origin (b) single
celled and lie in the centre of ovule (c) single celled and epidermal in origin (d)
multicelled and hypodermal in origin 57. The sequence of development of
embryo ...
5
The Evolution of the Land Plants (Embryophyta)
Unlike Sphagnum, but resembling Andreaea, the archesporium is formed from
the outermost layer of cells belonging to the endothecium. The cells lying
immediately within the archesporium, forming the "inner spore sac," are sister
cells of the ...
Douglas Houghton Campbell, 1940
6
Concepts of Biology XII
The correct sequence of events during the development of embryo sac in
angiosperms is: (1) megaspore mother cell - megaspore - archesporium - embryo
sac (2) megaspore - archesporium - megaspore mother cell - embryo sac (3) ...
Prof. Kotpal, Dr. Tyagi, Dr. Bendre, & Dr. Pande
7
Concise Encyclopedia Biology
Each theca is divided longitudinally into two united pollen sacs or
microsporangia, each containing pollen—forming tissue (archesporial tissue or
archesporium). The archesporium is surrounded by 4 cellular layers: 1) The
Tapetum (see) or ...
Uni- or multicellular archesporium differentiates hypodermally under each lobe.
Archesporial cells are characterized by their relatively large size and stainability.
In Cananga odorata (Annonaceae), the archesporium may consist of a single ...
A. K. Shukla, M. R. Vijayaraghavan, B. Chaudhry, 1998
9
Taxonomy of Angiosperms
Within the nucellus, the archesporium may be many celled or one-celled. The
unicellular archesporium is clearly derived from the multicellular type. The
multicellular archesporium in members of certain advanced families such as the ...
SPORE SAC OR TAPETUM The cell layers limiting the archesporium on outer
and inner sides are characterized by the richness of cell contents, and it is clear
that they provide nutrition to the archesporium and the sporocytes (Goebel, 1905)
, ...
