Abstract

Light microscopy staining methods for amino acids and sugars were adapted for glutaraldehyde vapor-fixed, freeze dried, plastic embedded tissue of peanut cotyledons (Arachis hypogaea L.). These methods revealed the locale of amino acids and sugars, which are regarded as precursors of roasted peanut flavor compounds. Amino acids were localized in the protein bodies and cytoplasmic network by Coomassie Brilliant Blue G-250, Orange G, and diacetylbenzene. Sugars were localized in the protein bodies and cytoplasmic network by Alcian Blue - PAS procedure and an adaptation of the Okamoto method for sugars. Localization of the amino acids and sugars provide further evidence to the importance of the protein bodies in the cotyledon in the production of roasted peanut flavor.

Available as PDF only - Use Download Feature 

Keywords: Histochemistry, light microscopy, roasted flavor precursors, Coomassie Brilliant Blue G-250, Orange G, diacetylbenzene, Alcian Blue - PAS, Okamoto method, amino acids, Sugars, Cotyledons

How to Cite:

Young, C. & Pattee, H. & Schadel, W. & Sanders, T., (2003) “Histochemical Localization of Amino Acids and Sugars in Peanut Cotyledons for Light Microscopy¹”, Peanut Science 30(2), p.104-107. doi: https://doi.org/10.3146/pnut.30.2.0008

Author Notes

¹The research reported in this publication was a cooperative effort of the Agric. Res. Serv. of the U. S. Department of Agriculture and the North Carolina Agriculture Research Service, Raleigh, NC 276957643. The use of trade names in this publication does not imply endorsement by the U.S. Department of Agriculture or the North Carolina Agriculture Research Service of the products named, nor criticism of similar ones not mentioned.