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Science 21 April 1978:
Vol. 200. no. 4339, pp. 319 - 320
DOI: 10.1126/science.200.4339.319
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Articles

Photocontrol of Boron Metabolism in Sea Grasses

WARREN M. PULICH JR. 1

1 University of Texas Marine Science Institute, Port Aransas Marine Laboratory, Port Aransas 78373

Boron is taken up in the dark and is excreted in response to light by the leaves of the marine vascular plant, Halophila engelmannii Ascherson. This phenomenon makes possible the study of boron metabolism in a higher plant without the stress of boron deficiency. Dependence of boron excretion on photosynthetic CO2 fixation suggests that an organoboron complex between boron and a newly formed carbon compound from photosynthesis is selectively excreted.

Submitted on December 12, 1977
Revised on January 24, 1978

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Science. ISSN 0036-8075 (print), 1095-9203 (online)