Free Amino Acid and Remobilized Nitrogen Composition in Leaves of Cajanus cajan (L.) at Three Different Phases of Crop Growth

Author(s): B. Priyadarshini, M.V.V.P. Kumar, V. Durga Bhavani and B. Sujatha*

Abstract: Twelve genotypes of pigeonpea (Cajanus cajan (L.) Millspaugh) which were divided into three groups based on the duration for flower initiation i.e. Short duration (ICPL151, ICPL87, ICPL1, ICPL6), Medium duration (T21, HY2 mutant, Pusa agheti, C11) and Long duration (ICPL270, ST1, PDM1, LRG30) were selected and was raised at the Experimental Farm of the Department of Botany, Andhra University, Waltair, Visakhapatnam, A.P., India for the present study on Total free amino acids, Free amino acid composition, Remobilized nitrogen, Nitrogen remobilization efficiency and Total nitrogen harvest index of the pigeonpea genotypes at three different phases of crop growth i.e. vegetative, flowering and seed maturation phase. Total free amino acid content in the genotypes the ICPL151 of short duration, the Pusa agheti of medium duration and the ST1 of long duration recorded higher values at the seed maturation phase in their respective groups. Quantitative differences in the free amino acid composition of different genotypes at the flowering phase was recorded the absence of cysteine and valine in all the medium duration, long duration and ICPL6 of short duration genotypes. Lysine was present in greater quantities in the short duration genotypes than in the medium and long duration genotypes, whereas methionine was absent in all long duration genotypes. Glutamic acid and proline were present in greater quantities in the medium and long duration genotypes when compared to the short duration genotypes. Maximum and minimum values of remobilized nitrogen, nitrogen remobilization efficiency and total nitrogen harvest index were recorded in the ICPL87 of short duration and the ST1 of long duration genotypes respectively.

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