Dictionary > Nucellar embryony

Nucellar embryony

Definition
noun
A form of apomixis where a nucellar embryo arises from the diploid nucellus tissue surrounding the embryo sac.
Supplement
Apomixis in flowering plants exists in two forms:

Adventitious or nucellar embryony occurs in some citrus seeds. Male apomixis also occurs in rare cases, such as the Saharan Cypress where the genetic material of the embryo are derived from pollen. It was also observed to occur in some animals such as water fleas.
See also: asexual reproduction, meiosis


You will also like...

Human Nervous System
The Human Nervous System

The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

"Cronopio dentiacutus", a prehistoric mammal (an illustration)
Mammalian Ancestors

Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

Endemic Flora of New Zealand
New Zealand’s Unique Flora

If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..

Homo Species
The Homo Species

The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

Physiological Homeostasis
Physiological Homeostasis

Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

Sensory systems
Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

Related Articles...

No related articles found

See all Related Topics