KARYOMORPHOLOGY AND CHROMOSOME NUMBER CONFIRMATION IN URARIA PICTA (JACQ.) DC.
Journal Title: International Research Journal of Pharmacy (IRJP) - Year 2012, Vol 3, Issue 7
Abstract
Karyomorphological studies performed in Uraria picta (Jacq.) DC. (Family: Leguminosae, Subfamily: Papillionidae), an important Ayurvedic herb (Ayurvedic name: Prishni parni), revealed 7 (2n = 22; 2Lsm + 2Lscsm + 4Mm + 2Msac + 2Ssm + 8Sm + 2Sac) morphologically distinct chromosome types. The chromosomes in the species were graded (long: L - ≥ 2.0µm; medium: M - ≥ 1.0µm; small: S - < 1.0µm) on the basis of absolute chromosome length (0.59µm to 2.625µm). The karyotype showed preponderance of chromosomes with metacentric (m) primary constrictions; although, it was asymmetric in nature (TF%: 37.65). Total haploid chromosome length was noted to be 12.63µm ± 3.73. Two pairs of chromosomes in the complement were with secondary constrictions and they were associated both with short as well as long arms. The chromosome number (2n¬ = 22) analyzed in root tip mitosis was in agreement to the number noted in microsporocytes (n = 11). The confirmed number in the species is 2n = 22.
Authors and Affiliations
Arnab Bhattacharya , Animesh Datta
Keywords
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