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Iowa State University

Soybean

2001

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Calcium Oxalate Crystals In Developing Seeds Of Soybean, H. Ilarslan, R. G. Palmer, Harry T. Horner Jan 2001

Calcium Oxalate Crystals In Developing Seeds Of Soybean, H. Ilarslan, R. G. Palmer, Harry T. Horner

Botany Publication and Papers

Young developing soybean seeds contain relatively large amounts of calcium oxalate (CaOx) monohydrate crystals. A test for Ca and CaOx indicated that Ca deposits and crystals initially occurred in the funiculus, where a single vascular bundle enters the seed. Crystals formed in the integuments until the embryo enlarged enough to crush the inner portion of the inner integument. Crystals then appeared in the developing cotyledon tissues and embryo axis. All crystals formed in cell vacuoles. Dense bodies and membrane complexes were evident in the funiculus. In the inner integument, cell vacuoles assumed the shape of the future crystals. This presumed ...


Oxalate Content Of Soybean Seeds (Glycine Max:  Leguminosae), Soyfoods, And Other Edible Legumes, Linda K. Massey, Reid G. Palmer, Harry T. Horner Jan 2001

Oxalate Content Of Soybean Seeds (Glycine Max:  Leguminosae), Soyfoods, And Other Edible Legumes, Linda K. Massey, Reid G. Palmer, Harry T. Horner

Botany Publication and Papers

Consumption of soybeans and food products made from them is increasing because of their desirable nutritional value. However, the oxalate content of seeds from 11 cultivars of soybean showed relatively high levels of total oxalate from 0.67 to 3.5 g/100 g of dry weight. Oxalate primarily was found as calcium oxalate crystals. Thirteen tested commercial soyfoods contained between 16 and 638 mg of total oxalate per serving. These values compare to those of three other legume foods, peanut butter, refried beans, and lentils, which contained 197, 193, and 100 mg of total oxalate per serving, respectively. After ...