Author (s): M. J. Ullah1, F. Hossain2, Q. A. Fattah3 and A. B. M. Khaleduzzaman4
*Corresponding author, E-mail: jafarullahsau@gmail.com
*Corresponding author, E-mail: jafarullahsau@gmail.com
Abstract
A field experiment was conducted at the research farm of Sher-E-Bangla Agricultural University during the rabi season of 2001-2002. Three concentrations of potassium naphthenate (1200, 1300 and 1400 ppm) and two concentrations of naphthalene acetic acid (40 and 50 ppm) were tested on cowpea along with a control with water spray to evaluate their effects on amino acid contents (Glutamic acid, Aspartic acid, Leucine, Arginine, Lysine, Phenylalanine, Serine, Valine, Alanine, Glycine, Isoleucine, Threonine and Tyrosine) in cowpea seeds. Foliar application of NAA and KNap greatly influenced the amino acids content in cowpea seeds. Spraying NAA (both 40 and 50 ppm) increased Glutamic acid (3.37 to 6.35%), Aspartic acid (2.68 to 7.05%), Lysine (2.62 to 4.71%) and Serine (5.0 to 12%) contents as compared to control while reverse result was observed with KNap spaying. Both NAA and KNap spraying increased arginine content in seeds. The maximum Arginine (2.00-2.01%) was obtained by KNap 1300 and NAA 50 ppm; and that of Leucine (2.018% with KNap 1300 ppm. NAA 50 ppm showed the highest value of Serine. The higher concentration of KNap showed higher Valine content (1.28-1.3%). The highest value of Glycine was found with KNap 1300 ppm while that of Alanine with KNap 1300-1400 ppm. Isoleucine, Tyrosine, Threonine and Phenylalanine neither increased nor were affected with growth regulator applications.
Key words: Cowpea, Vigna unguiculata and Amino acids.
Full pdf: PDF
J. Expt. Biosci. 2(2): July 2011
