Journal article
Root development in the seagrass Halophila ovalis (R.Br.) Hook f. (Hydrocharitaceae), with particular reference to root lacunae
New Phytologist, Vol.100(1), pp.25-36
1985
Abstract
The roots of Halophila ovalis are sheathed by root cap cells up to 2 mm above the meristem tip, and carry prominent root hairs. Air lacunae differentiate schizogenously close to the apex, where they are first occluded by material which stains heavily with toluidine blue, but some appear empty within 300 μ of the apex, offering a path for gaseous diffusion to the apical region. As a root matures the lacunae, which differentiate centripetally, contribute approx. 22 % of the root cross sectional area, as compared with about 65 % due to cortical cells.
Sieve tubes differentiate before xylem elements. Casparian strip formation and xylem differentiation are approximately synchronous, suggesting that these structures are involved in the uptake and transport of materials.
Details
- Title
- Root development in the seagrass Halophila ovalis (R.Br.) Hook f. (Hydrocharitaceae), with particular reference to root lacunae
- Authors/Creators
- D.G. Roberts (Author/Creator)A.J. McComb (Author/Creator)J. Kuo (Author/Creator)
- Publication Details
- New Phytologist, Vol.100(1), pp.25-36
- Publisher
- Blackwell Publishing
- Identifiers
- 991005540704707891
- Copyright
- © 1985 The New Phytologist
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.1182 Coastal Vegetation
- Web Of Science research areas
- Plant Sciences
- ESI research areas
- Plant & Animal Science