Morphogenetic aspects in Macrocystis development
Differential growth of the giant kelp Macrocystic pyrifera, was observed in frond meristems and in young sporophytes at their primary-blade stage. Autoradiographs of plants pulse-labeled with /sup 14/C showed both that the carbon was taken up and translocated and that the fixed carbon was diluted in regions of vigorous meristematic growth. Both labeling experiments and studies of changes in size and location of holes punched in the blades illustrated a pattern of basipetal maturation and determine growth. Size and distribution of mucilage ducts, as seen in cleared whole mounts of primary blades, point to a basipetal pattern of differentiation as well. Alginase activity was relatively high in young pneumatocysts and may be involved in growth of the pneumatocyst and development of the medulla. Frond tips collected from various depths were morphologically different and maintained these differences in their growth potential, even under greenhouse conditions.
- Research Organization:
- Tel Aviv Univ., Israel
- OSTI ID:
- 5559990
- Journal Information:
- Bot. Gaz. (Chicago); (United States), Vol. 146:3, Issue 3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON
UPTAKE
SEAWEEDS
AUTORADIOGRAPHY
PLANT GROWTH
CARBON 14 COMPOUNDS
CELL DIFFERENTIATION
ENZYME ACTIVITY
MERISTEMS
MORPHOLOGY
O-GLYCOSYL HYDROLASES
TRACER TECHNIQUES
AQUATIC ORGANISMS
BODY
ELEMENTS
ENZYMES
GLYCOSYL HYDROLASES
GROWTH
HYDROLASES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
NONMETALS
PLANT TISSUES
PLANTS
TISSUES
550801* - Morphology- Tracer Techniques