What is a Scalariform conjugation?
What is a Scalariform conjugation?
: sexual union between cells in adjacent filaments of an alga — compare lateral conjugation.
What is mean by lateral conjugation?
: sexual union between neighboring cells of the same filament of an alga — compare scalariform conjugation.
What does Scalariform mean?
a ladder
: resembling a ladder especially in having transverse bars or markings like the rungs of a ladder scalariform cells in plants.
What is direct lateral conjugation?
In direct lateral conjugation, via a pore, the material of one cell acting as a male gamete moves into the neighboring cell acting as a female gamete and the zygospore is formed.
What is the difference between Scalariform and lateral conjugation?
Scalariform conjugation requires association of two or more different filaments lined side by side, either partially or throughout their length. In lateral conjugation, gametes are formed in a single filament.
How do spirogyra reproduce asexually?
Spirogyra species can reproduce both sexually and asexually. Asexual, or vegetative, reproduction occurs by simple fragmentation of the filaments. Sexual reproduction occurs by a process known as conjugation, in which cells of two filaments lying side by side are joined by outgrowths called conjugation tubes.
What is Scalariform xylem?
The scalariform tracheids are quite effectual water- conducting wood constituents, but they are insufficiently strong to enable the wood to support trunk and crown. Therefore, the scalariform tracheids are invariably vessel ones. The latter plants must have had wood of only scalariform tracheids.
How does Scalariform conjugation differ from lateral conjugation?
The essential difference is that scalariform conjugation occurs between two filaments and lateral conjugation occurs between two adjacent cells on the same filament.
What do you mean by Zygospore?
: a thick-walled spore of some algae and fungi that is formed by union of two similar sexual cells, usually serves as a resting spore, and produces the sporophytic phase.
How can you identify Scalariform conjugation?
Scalariform conjugation requires association of two or more different filaments lined side by side, either partially or throughout their length. One cell each from opposite lined filaments emits tubular protuberances known as conjugation tubes, which elongate and fuse to make a passage called the conjugation canal.
Which is the best definition of scalariform conjugation?
Definition of scalariform conjugation. : sexual union between cells in adjacent filaments of an alga — compare lateral conjugation.
Where does scalariform conjugation in Spirogyra take place?
It takes place in cell of two different filament i.e takes places between heterothallus and dioecious species like S.tuwensis , S. Cylindrica etc. In this process , two filament of opposite strain come together and lie side by side parallel to each other. They are glued together by mucilage.
How are lateral conjugation tubes formed in a Spirogyra?
In lateral conjugation, adjacent cells of a Spirogyra sp function as male and female gametes. Conjugation tubes are formed between cells of the same filament. Lateral conjugation is of two types: Direct lateral conjugation: Passage is formed between two adjacent cells through the middle lamella.
What are two types of lateral conjugation canal formation?
In lateral conjugation, the contents of adjacent cells act like male and female gametes. So the adjacent cells of the same filament develop conjugation tubes. There are two types of lateral conjugation – direct and indirect. The style of conjugation canal formation differs in these two methods.