Comparison of free and bound amino acids in white and green tissues of variegated tobacco nicotiana tabacum cultivar turkish samsum plants
Tanabe, Y.; Kawashima, N.
Plant and Cell Physiology 23(3): 433-440
ISSN/ISBN: 0032-0781 Accession: 005007996
Qualitative and quantitative comparisons of free and bound amino acids and soluble proteins in white and green tissues of variegated tobacco leaves were made. White tissue contained more free and less bound amino acids than green tissue, although the sum of the total amino acids did not differ significantly between the 2 tissues. The major free amino acids in white tissue were glutamine and asparagine, whereas those in green tissue were glutamic acid, aspartic acid and GABA. The contents of fraction 1 protein and 70 S ribosomes in white tissue were negligible in comparison with those present in green tissue, but the amounts of other soluble protein components and the 80 S ribosomes were at the same level in both tissues.