title: Growth Response of Halophila engelmanni Aschers. to Sulfide, Copper, and Organic Nitrogen in Marine Sediments.
abstract: Growth response of the seagrass Halophila engelmanni Aschers. was studied using defined culture techniques. When added to the rhizosphere, nutrient-seawater medium supported vigorous plant growth, if substantial Cu (10 times that in modified Hoagland solution) plus organic N were present. H(2)S up to 0.2 millimolar in the sediment was not inhibitory. A requirement for exogenous organic N, especially urea, is postulated for vigorous growth of Halophila.
authors: The University of Texas at Austin, Marine Science Institute, Port Aransas, Texas 78373.
authors: W M
authors: WM
authors: Pulich