Matrotrophy

Matrotrophy is a form of development in which the embryo is supplied with additional nutrition from the mother (e.g. through a placenta). This can be contrasted with lecithotrophy, in which the only source of nutrition for the embryo is yolk originally contained within its egg.

In plant sciences, matrotrophy (maternal care) is considered a critical innovation preceding the origin of embryophytes and thus essential to the evolution of land plants ^[1]. Matrotrophy is facilitated by cytological and ultrastructural modifications on one or both sides of the generational junction, a region called the placenta ^[2]. Specialization of the placental cells pertains further to their cytological and ultrastructural characteristics: the cytoplasm is often dense and rich in lipids, the vacuole is typically reduced but large in Sphagnum, the endoplasmic reticulum extensive, mitochondria numerous and large, chloroplasts numerous, often less differentiated, rich in lipid-filled globuli and sometimes filled with starch ^[3].

References

1. ^ Graham LKE, Wilcox LW. 2000. The origin of alternation of generations in land plants: a focus on matrotrophy and hexose transport. Philosophical transactions of the Royal Society of London B355. 757-67.
2. ^ Ligrone R, Duckett JG, Renzaglia KS. 1993. The gametophyte-sporophyte junction in land plants. Advances in botanical research 19. 231-317.
3. ^ Ligrone R, Duckett JG, Renzaglia KS. 1993. The gametophyte-sporophyte junction in land plants. Advances in botanical research 19. 231-317.

• Goffinet B, Et al. 2009. Morphology and classification of Bryophyta. In Bryophyte Biology 2nd ed. Cambridge University Press.

This botany article is a stub. You can help Wikipedia by expanding it.v · Categories: Embryology Botany stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем решить контрольную работу Matrosskaya Tishina Matrouh Governorate Look at other dictionaries: placental matrotrophy — nutrients provided directly via a placenta in endogenous feeding, q.v …   Dictionary of ichthyology Solomon Islands skink — Solomon Islands skink …   Wikipedia Gestation — is the carrying of an embryo or fetus inside a female viviparous animal. Mammals during pregnancy can have one or more gestations at the same time (multiple gestations). The time interval of a gestation plus 2 weeks is called gestation period ,… …   Wikipedia Poeciliidae — Taxobox name = Poeciliidae image width = 250px image caption = Sailfin molly ( Poecilia latipinna ) regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Cyprinodontiformes familia = Poeciliidae familia authority = Garman, 1895… …   Wikipedia Placenta — For the ancient Roman bread, see placenta (food). For the placenta of fruit, see placentation. Placenta Placenta Precursor …   Wikipedia Skink — This article is about the reptile. For other uses, see Skink (disambiguation). Skink family Eastern blue tongued lizard Scientific classification …   Wikipedia Vivipary — A viviparous animal is an animal employing vivipary: the embryo develops inside the body of the mother, as opposed to outside in an egg (ovipary). The mother then gives live birth. The less developed form of vivipary is called ovoviviparity,… …   Wikipedia Goodeidae — Taxobox name = Splitfins regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Cyprinodontiformes familia = Goodeidae subdivision ranks = Subfamilies subdivision = Empetrichthyinae Goodeinae See text for genera and species.Splitfins …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”