NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Lateral root initiation in Marsilea quadrifolia. I. Origin and histogensis of lateral rootsIn Marsilea quadrifolia, lateral roots arise from modified single cells of the endodermis located opposite the protoxylem poles within the meristematic region of the parent root. The initial cell divides in four specific planes to establish a five-celled lateral root primordium, with a tetrahedral apical cell in the centre and the oldest merophytes and the root cap along the sides. The cells of the merophyte divide in a precise pattern to give rise to the cells of the cortex, endodermis, pericycle, and vascular tissues of the emerging lateral root. Although the construction of the parent root is more complicated than that of lateral roots, patterns of cell division and tissue formation are similar in both types of roots, with the various tissues being arranged in similar positions in relation to the central axis. Vascular connection between the lateral root primordium and the parent root is derived from the pericycle cells lying between the former and the protoxylem members of the latter. It is proposed that the central axis of the root is not only a geometric centre, but also a physiological centre which determines the fate of the different cell types.
Document ID
20040090022
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lin, B. L.
(The Ohio State University Columbus 43210, United States)
Raghavan, V.
Date Acquired
August 21, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Canadian journal of botany
Volume: 69
ISSN: 0008-4026
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Program Space Biology
NASA Discipline Number 29-20
NASA Discipline Plant Biology

Available Downloads

There are no available downloads for this record.
No Preview Available