What is pseudogamy in botany?
What is pseudogamy in botany?
In botany. Thus in botany, pseudogamy means any reproductive process that requires pollination but does not involve male inheritance. It is sometimes used in a restrictive sense to refer to types of agamospermy in which the endosperm is fertilized but the embryo is not (see Pseudogamous apomixis, below).
What is pseudo fertilization in biology?
Definition of pseudofertilization : a process substituting for normal fertilization (as fusion of egg and polar body in various coccids or pseudogamy in a nematode)
What is meant by Mesogamy?
Mesogamy is when pollen tube enters via the integuments. Fusion of male and female gametes refers to as fertilization or fusion of gametes. So, the correct option is ‘entry of the pollen tube through the integument’.
What is Porogamy Mesogamy and Chalazogamy?
During the entry of pollen tube into the ovary through the style (after pollination), when the pollen tube enters through the micropylar end, it’s called porogamy; when it enters through the Chalazal end, it’s called chalazogamy;when it enters through the integuments, it’s called mesogamy.
What is meant by Siphonogamy?
Siphonogamy is a condition in plants in which pollen tubes are developed for the transfer of the male cells to the eggs. The seed plants are siphonogamous, while in the lower plants the male cells usually swim to the eggs. As a consequence, the spermatophytes were sometimes called siphonogams.
What is Chalazogamy give an example?
Chalazogamy is the entry of pollen tube through chalaza or the integuments. This was discovered by Treub. For example- Casuarina. Partial chalazogamy is found in Ulmus.
What is androgenesis in plants?
The term androgenesis refers to plant regeneration directly from microspore culture under in vitro conditions. The underlying principle of androgenesis is to stop the development of pollen cells, which normally become sexual cells, and to force their development directly into a complete plant (Nitsch, 1981).
