Normally, the egg cell requires the fertilization stimulus to form an embryo. However, it has the necessary genetic information to initiate embryogenesis independent of fertilization (Parthenogenesis). In some apomictic plants, the egg cell divides in total absence of a stimulus from the male gametes. In several other plants, it is possible to induce the egg or some other cell of the embryo sac (Apogamy) by external treatments, to divide and form an embryo (Bhojwani and Thomas 2001). Development of sporophytes from an unfertilized element of the female gametophyte (embryo sac) is termed gynogenesis. Since the ells of the embryo sac are haploid the plants derived from them are also haploid.
Suggested Further Reading
- Juðkevièienë D, Stanya V, Bobinas É (2005) Gynogenesis peculiarities of Allium L. vegetables grown in Lithuania. Biologia 3:6–9Google Scholar
- Mól R (2003) In vitro gynogenesis as a method for haploid plant production. Biotechnologia 3:52–61Google Scholar
- San Noeum LH (1976) Haplöides d’ Hordeum vulgare L. par culture in vitro d’ ovaries non-fecondes. Ann Amelior Plant 26:751–754Google Scholar
- San Noeum LH, Gelebart P (1986) Production of gynogenetic haploids. In: Vasil IK (ed) Cell culture and somatic cell genetics of plants, Plant regeneration and genetic variability, vol 3. Academic Press, Orlando Google Scholar
- Yang HY, Zhou C (1990) In vitro gynogenesis. In: Bhojwani SS (ed) Plant tissue culture: applications and limitations. Elsevier, AmsterdamGoogle Scholar