Metabolic diversity in the grains of Indian varieties of rice.
The aim of the present work was to analyze metabolic diversity in 26 different indica varieties of rice grains. Seventy-six metabolites could be identified in the methanol extracts of each of the rice varieties analyzed by gas chromatography-mass spectrometry. These metabolites included 9 sugars/sugar alcohols, 17 amino acids/derivatives, 18 fatty acids, 5 free phenolic acids and 19 other organic acids, 3 phytosterols, 5 other constituents. Cluster analyses to extract information for similarity and differences in metabolites unveiled diversity in metabolite profile. Two hierarchical clusters were generated based on the metabolite contents of the rice varieties. The first cluster (cluster I) consisted of one variety only. The second cluster again segregated into four clusters (clusters II, III, IV and V). Very distinct differences were visible amongst the clusters with respect to their sugars/sugar alcohols, organic acid, amino acid and fatty acid, phenol, and sterol profiles. Metabolites determine nutritional quality, taste, aroma. This and future efforts on the metabolomic information would help biochemists and nutritionists to better understand the nutritional quality of such grains at varietal level and correlating metabolites and long term human health related issues.
Phytochemistry and Pharmacognosy research Laboratory, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India. Electronic address: bratatide@hotmail.com.
Bratati
B
De
Phytochemistry and Pharmacognosy research Laboratory, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India.
Gargi
G
Nag
D000438:Alcohols / Q000032:analysis / Q000378:metabolism; D000596:Amino Acids / Q000032:analysis / Q000378:metabolism; D044822:Biodiversity; D050260:Carbohydrate Metabolism / Q000502:physiology; D002241:Carbohydrates / Q000032:analysis; D002523:Edible Grain / Q000737:chemistry; D005227:Fatty Acids / Q000032:analysis / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007194:India; D009753:Nutritive Value; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism*; D013045:Species Specificity
D000438:Alcohols; D000596:Amino Acids; D002241:Carbohydrates; D005227:Fatty Acids
Diversity; Metabolites; Rice grains