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CHALAZOGAMY B ANTIPODAL CELLS CHALAZAL POLE POLAR NUCLEI (n)
SYNERGIDS POLLEN TUBE. Fig. 33 : Entry of pollen tube into the ovule : A—
Porogamy; B— Chalazogamy; C — Mesogamy. G Fig. 36 : Different stages in the
...
2
Proceedings of the American Academy of Arts and Sciences
A Brief Resume of Chalazogamy In drawing comparisons between the
Casuarinaceae and other chalazogams, one naturally turns to the so-called
Amentiferae, a group which is generally considered to comprise the following
families: ...
3
morphology of angiosperms
True chalazogamy, therefore, has as yet been found only among the Amentiferae
, but such an intermediate condition as shown by Ulmus, Cucurbita, and
Alchemilla, in which the pollen-tube enters the ovule at the chalazal end, but
traverses ...
John Merle Coulter And Charle Joseph Chamberlain, 1987
4
Krishna's Objective Question Bank in Biology
The fertilization in which the male gametes are carried through pollen tube is
known as (1) Chalazogamy (2) Siphonogamy (3) Syngamy (4) Porogamy (CBSE
1994) 76. Double fertilization was discovered by (1) KarlSchnarf (2) P.
Maheshwari ...
N Saxena, S Sharma, S Sharma
(ii) Chalazogamy : When the pollen tube enters the ovule through the chalaza,
the phenomenon is called chalazogamy. It was first observed by Treub, 1891 in
Casuarina. (iii) Mesogamy : When the pollen tube enters the ovule through the ...
6
Embryology of flowering plants: terminology and concepts. Seed
CHALAZOGAMY Chalazogamy (Greek chalaza — knot and gamos — marriage)
— penetration of the pollen tube into the embryo sac of the ovule through the
integument (integuments) in the area of the chalaza by-passing the micropyle (
Plate ...
7
Cmplt Biology For Medical Ent Exams
The entrance of the pollen tube into an ovule through the funicle or the
integument is called (a) Porogamy (b) Mesogamy (c) Chalazogamy (d)
Pseudogamy 74. After penetrating stigmatic and stylar tissues, the pollen tube
usually grows down ...
8
Concepts of Biology XII
Chalazogamy. The entry of pollen tube into the ovule from chalazal region is
known as chalazogamy (Fig. 25 B); e.g., Casuarina. 3. Mesogamy. When the
pollen tube enters the ovule through funicle or integument, it is called mesogamy
(Fig.
Prof. Kotpal, Dr. Tyagi, Dr. Bendre, & Dr. Pande
9
The Classification of Flowering Plants
... 374; pollination, 362 Cephalantherhiae, 374 Cephalotaxus, 112; archegonia,
103; female cone, 92; male cone, 87; seed, 108 Ceratozamia, stipules, 49
CeroxyUm, 257, 259 Cesalpini, A., De plantis libri, 4 Chalazogamy, 162
Chamaedorea, ...
Alfred Barton Rendle, 1967
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The Embryology Of Angiosperms, 5E
Unfortunately, there is no explanation available for the mechanism of pollen tube
entry into the ovules showing chalazogamy or mesogamy. POROGAMY
CHALAZOGAMY MESOGAMY Fig. 9.16 Modes of pollen tube entry into the ovule
.
S P Bhatnagar S S Bhojwani, 2009
