Journal
PLANT SYSTEMATICS AND EVOLUTION
Volume 267, Issue 1-4, Pages 93-104Publisher
SPRINGER WIEN
DOI: 10.1007/s00606-007-0556-8
Keywords
developmental anatomy; Griffithella hookeriana; organ identity; Podostemaceae; Polypleurum stylosum; SAM; in vitro seed germination
Categories
Ask authors/readers for more resources
The morphological nature of the thalloid plant body of podostemads has remained controversial for long. The present investigation was carried out on two members of the Podostemoideae i.e. Griffithella hookeriana and Polypleurum stylosum to understand their organ identity. The origin of the plant body was traced from the embryo by germinating the seeds under aseptic conditions. Mature embryo of both species does not show an identifiable shoot apical meristem (SAM) and root apical meristem (RAM). Upon germination, the radicular pole does not form a primary root but differentiates adhesive hairs. At the cotyledonary junction, SAM is initiated that differentiates 6-9 leaves apically (primary axis) and a primordium laterally. This primordium subsequently emerges from the hypocotyl and develops into a thalloid plant. The latter has been interpreted as a flattened stem because it not only shows tunica-corpus like organization at the tip but also originates endogenously from the same SAM that forms the `primary axis'.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available