ISSN:
1432-1793
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Light intensity within the range of 40 to 210 μE · m-2 · s-1 had relatively little effect on the abundance, length or distribution of Ceramium rubrum unicellular, hyaline hairs. External NH 4 + concentrations less than 0.5 μM stimulated hair initiation and growth in apical regions of the thalli. Ammonium concentrations in excess of 20 μM inhibited hair formation on all regions of the thalli. Ammonium uptake velocities of plants with hairs were approximately twice those of plants without hairs. These hairs may be adaptive to take advantage of intermittent bursts of nutrients by increasing the plant's surface area and, hence, the number of nutrient uptake sites.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00395811
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