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Plant Physiology 65:266-273 (1980)
© 1980 American Society of Plant Biologists

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Effect of Boron on the Incorporation of Glucose from UDP-Glucose into Cotton Fibers Grown in Vitro

W. M. Dugger and R. L. Palmer

Department of Botany and Plant Sciences, College of Natural and Agricultural Sciences, University of California, Riverside, California 92521

Boron is required for fiber growth and development in cotton ovules cultured in vitro. Incorporation of [14C]glucose by such fiber from supplied UDP-[14C]glucose into the hot alkali-insoluble fraction is rapid and linear for about 30 minutes. Incorporation of [14C]glucose from such substrate by fibers grown in boron-deficient ovule cultures is much less than in the case with fibers from ovules cultured with boron in the medium. Total products (alkali-soluble plus alkali-insoluble fractions) were also greater in fibers from ovules cultured with boron. The fraction insoluble in acetic-nitric reagent was a small part of the total glucans; however, in the boron-sufficient fibers, there was significantly more of this fraction than in fibers from boron-deficient ovule cultures. The hot water-soluble glucose polymers from the labeled fibers had a significant fraction of the total [14C]glucose incorporated from UDP-[14C]glucose. Both {beta}-1,4- and {beta}-1,3- water-soluble polymers were formed in the boron-sufficient fibers, whereas the same water-soluble fraction from the boron-deficient fibers was predominantly {beta}-1,3-polymers. The incorporation of [14C]glucose from GDP-[14C]glucose by the fibers attached to the ovules was insignificant.




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R. K. Tewari, P. Kumar, and P. N. Sharma
Morphology and oxidative physiology of boron-deficient mulberry plants
Tree Physiol, November 20, 2009; (2009) tpp093v1.
[Abstract] [Full Text] [PDF]


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Copyright © 1980 by the American Society of Plant Biologists