The female gametophyte in two Indian genera of Tristichoideae (Podostemaceae)—A reinvestigation

Autor:	C. R. Nagendran, Govindappa D. Arekal
Rok vydání:	1977
Předmět:	Gametophyte Podostemaceae Plasmodium (life cycle) biology Embryology embryonic structures Botany Ovary (botany) Embryo biology.organism_classification Ovule Tristichoideae
Zdroj:	Proceedings / Indian Academy of Sciences. 86:287-294
ISSN:	0370-0097
DOI:	10.1007/bf03050952
Popis:	Many anatropous tenuinucellate and bitegmic ovules are present in the trilocular ovary ofIndotristicha ramosissima (Wight) van Royen andDalzellia zeylanica (Gardn.) Wight. The two integuments in both species originate simultaneously. The four nuclei present in the organized embryo sac are derived from the primary micropylar nucleus of the two nucleate embryo sac. Development and organization of the female gametophyte conforms to the Apinagia type, form B. The organized embryo sac has two synergids, an egg and a polar cell; there are no antipodal cells. Forms C and D of the Apinagia type do not exist in the family. Organization of the nucellar plasmodium occurs after fertilization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d747c5596c8441fa268c163a5965d730 https://doi.org/10.1007/bf03050952 Zobrazit plný text záznamu Full text from SpringerLink