Fecundation in Plants
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These nuclei undergo the same changes as those in the oogonium, /. e., they divide karyokinetically, and some disorganize.
The fecundation-tubes are now developed and usually more than one from each antheridium. They penetrate the wall of the oogonium at ^t.ata.s.
Fig. 37.— Stages In development of sexual organs olA. ameri- cana var. cimirica. — (After Trow.) A, young oogonium before delimination from hypha; base of globular enlargement incloses a vacuole which is con- tinued back into hypha.
B...;much later stage; an antheridium applied to oogonium, both organs delimited fromhyphae; protoplasm of oogo- nium, which now forms a thick wall-layer, has begun to ball up to form the eggs .
C, still later stage ; balling more pronounced.
D, oogonium with differentiated eggs ; conjugation-tubes from applied antheridium have entered oogonium and become applied to some of the eggs.
A-D drawn from living material.
the thinner places or pits, and grow in among the eggs (Fig. 37, D, f . t.).
These tubes contain nuclei which are exactly like those of the eggs, though smaller.
What to read after Fecundation in Plants?
You can find similar books in the "Read Also" column, or choose other free books by David Myers Mottier to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
These nuclei undergo the same changes as those in the oogonium, /. e., they divide karyokinetically, and some disorganize.
The fecundation-tubes are now developed and usually more than one from each antheridium. They penetrate the wall of the oogonium at ^t.ata.s.
Fig. 37.— Stages In development of sexual organs olA. ameri- cana var. cimirica. — (After Trow.) A, young oogonium before delimination from hypha; base of globular enlargement incloses a vacuole which is con- tinued back into hypha.
B...;much later stage; an antheridium applied to oogonium, both organs delimited fromhyphae; protoplasm of oogo- nium, which now forms a thick wall-layer, has begun to ball up to form the eggs .
C, still later stage ; balling more pronounced.
D, oogonium with differentiated eggs ; conjugation-tubes from applied antheridium have entered oogonium and become applied to some of the eggs.
A-D drawn from living material.
the thinner places or pits, and grow in among the eggs (Fig. 37, D, f . t.).
These tubes contain nuclei which are exactly like those of the eggs, though smaller.
What to read after Fecundation in Plants?
You can find similar books in the "Read Also" column, or choose other free books by David Myers Mottier to read onlineMoreLess
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