Chloroplast division during leaf development of Xanthium pensylvanicum Wallr. (Compositae)
Roman Maksymowych, Norman Dollahon, Russell J. Williams, Joseph A.J. Orkiszewski
Abstract
Division and growth of chloroplasts was studied during leaf development of Xanthium pensylvanicum at various stages of development represented by the leaf plastochron index.Between leaf plastochron indices -1.00 and 2.56 chloroplast division was observed with little enlargement. Between 2.50 and 5.00 chloroplasts enlarged in diameter with an average rate of 0.21 µm per day. At leaf plastochron index 5.00 chloroplasts attained their mature size of 6.12 µm. No chloroplast division was found after leaf plastochron index 2.50. A change in shape of plastids from spherical proplastids to discoidal accompanied their growth during stages 2.50 and 5.00.
Keywords
Xanthium pensylvanicum; chloroplast; leaf plastochron index; chloroplast growth
DOI:
https://doi.org/10.5586/asbp.1999.001
Journal ISSN:- 2083-9480 (online)
- 0001-6977 (print; ceased since 2016)
| This is an Open Access journal, which distributes its content under the terms of the Creative Commons Attribution License, which permits redistribution, commercial and non-commercial, provided that the content is properly cited. | |
| | |