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Book: Sulfur: A Missing Link between Soils, Crops, and Nutrition
Published by: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America

 

This chapter in SULFUR: A MISSING LINK BETWEEN SOILS, CROPS, AND NUTRITION

  1.  p. 235-249
    agronomy monographs 50.
    Sulfur: A Missing Link between Soils, Crops, and Nutrition

    Joseph Jez (ed.)

    ISBN: 978-0-89118-186-6

     
    Published: 2008


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doi:10.2134/agronmonogr50.c15

Improving the Sulfur-Containing Amino Acids of Soybean to Enhance its Nutritional Value in Animal Feed

  1. Hari B. Krishnan
  1. USDA-ARS and University of Missouri, Columbia

Abstract

Soybean [Glycine max (L.) Merr.] is an economical source of quality protein in the formulation of animal feeds. Domestic swine, poultry, beef, and dairy industries consume a total of 28 million megagrams of soybean meal annually. Though soybean is an excellent source of protein, increasing the quantity of sulfur-containing amino acids could further enhance their nutritive value. This chapter deals with recent developments in enhancing the levels of sulfur-containing amino acids and other essential amino acids in soybean. Introduction of methionine-rich heterologous proteins, elevating the expression of endogenous methionine-rich proteins, and expression of synthetic proteins containing a high percentage of essential amino acids are some of the approaches employed for improving the nutritional quality of the soybean seed. Though the prospects for increasing the sulfur-containing amino acid content of soybean appear promising, a thorough understanding of the intricacies of the sulfur assimilatory pathway and its regulation in soybean will aid in improving the quality of soybean seed protein.

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Copyright © 2008. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 5585 Guilford Road, Madison, WI 53711-5801, USA. Sulfur: A Missing Link between Soils, Crops, and Nutrition. Agronomy Monograph 50.