Open AccessComparative embryology of Bambusa tulda Roxb. and Thyrsostachys siamensis Gamble (Poaceae: Bambuseae)
Author(s) -
BHANWRA R. K.,
SHARMA M. L.,
VIJ S. P.
Publication year - 2001
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1111/j.1095-8339.2001.tb01086.x
Subject(s) - ovule , biology , integument , megaspore , endosperm , botany , bambusa , ovary , embryo , anatomy , bamboo , microbiology and biotechnology , pollen , endocrinology
Bambusa tulda and Thyrsostachys siamensis resemble each other in having an obovate ovary which is hairy and thickened along the apex, a pseudo‐crassinucellate ovule with a wide region of attachment, poorly‐developed and ephemeral outer integument, an inner integument which fails to grow beyond the nucellus, ‘Polygonum’ type of embryo sac ontogeny, parallel orientation of embryo sac to the long axis of the ovule, multiple antipodals which retain apical position in the embryo sac even during post‐fertilization phase of development, an ephemeral nucellus, relatively small bambusoid embryos, and many‐layered and apically thickened pericarp. However, they differ from each other in their gynoecial structure, the extent of the development of the outer integument, organization of megaspore tetrads and development‐stage‐related behaviour of the inner integument in the fertilized ovules. These taxa also differ from other members of the subfamily Bambusoideae in the structure of the mature ovule, endosperm and pericarp.