embryo culture eggs

Embryo Culture - Embryo mortality and seed failure associated with embryo development are most common reasons for failure of interspecific hybridization due to incompatability. In such instances, fertilization and zygote formation may not suffer but embr..

Embryo mortality and seed failure associated with embryo development are most common reasons for failure of interspecific hybridization due to incompatability. In such instances, fertilization and zygote formation may not suffer but embryo development does not ta..

Protoplast Culture - Protoplast is a cell without cell wall. In plants, the cells are invariably surrounded by thick cell wall made of cellulose and pectin. During the process of tissue culture and using it for crop improvement, cell wall acts as a barrier to induce mutations or..

. The callus is transferred to other medium that contains different hormones for differentiation to occur. This differentiated mass of tissue is called the embryoid which grows into the new plantlet. The plantlets are then planted in pots and then in the fields. Here are some terms used in cell and..

Parthenogenesis is a form of reproduction in which the ovum develops into a new individual without fertilisation. Natural parthenogenesis has been observed in many lower animals (it is characteristic of the rotifers), especially insects, e.g., the aphid. In many social insects, such as the ho..

) which is activated to grow into separate organism by suitable mixture of cytokinins and auxins. The success in tissue culture depends upon a) the precision and length of asceptic condition b) source of explants c) compositions and concentrations of nutrients media d) time and dosage of ..

Cloning of Organisms - Two or more individuals with identical genetic make up formed from one parent by asexual reproduction are called clones. For example, daughter plants produced by strawberry runners and whole plants produced by tissue culture are clones. Similarly, the individuals fo..

Many years ago, Frederick Steward and his co-workers cultured cells from carrot plants and induced some of them to develop into small embryos. Some of these embryos grew into whole plants. Today, researchers routinely regenerate crops, plants and many other plant..

The eggs of some normally sexually reproducing animals can be induced by artificial means to develop parthenogenetically. The stimuli inducing artificial parthenogenesis are salts, weak acids, organic solvents, urea, sucrose and physical stimuli like temperature, electric shock or mere sh..

. Each carpel bears many ovules each of which contain one egg, the female gamete. Each ovule bears the embryo sac that contains the egg and the polar nuclei in addition to other structures. Transfer of pollen grains to the stigma is called pollination. Pollination may ..