The Amino Acid Contents in Mangrove Rhizophora mucronata Leaves in Asahan, North Sumatra, Indonesia

¹ Department of Agrotechnology, Faculty of Agriculture, Asahan University, Kisaran, Sumatera Utara, 21216, Indonesia
² Department of Aquaculture, Faculty of Agriculture, University of Asahan, Kisaran, Sumatera Utara, 21216, Indonesia
³ Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor, IPB University, West Java, 16680, Indonesia
⁴ Department of Plant Biology, Faculty of Mathematics and Natural Sciences, Bogor, IPB University, West Java, 16680, Indonesia

^* Corresponding author: dafitariyanto767@gmail.com

Abstract

Amino acids are important components of mangrove plant metabolisms. The aim of this study was to determine the relationship of mangrove R. mucronata leaf colors to the amino acid content. This study was conducted between March to August 2019. The leaves were taken 50 g. The assessment of Amino acids was conducted using UPLC Waters Acquity Class H with PDA Detector. The principal component analysis (PCA) was used to determine the relationship analysis between R. mucronata leaf colors and amino acid concentrations. The largest content was L glutamic acid with a green leaf content of 6139.57 ± 694.17 mg/kg and yellow leaf content of 6105.013 ± 113.2058 mg/kg. The results of PCA 1 showed that the influential amino acids were L-threonine (0.94), L-tyrosine (0.96), L-alanine (0.92), L-vanin (0.93), and PCA 2 showed glutamic acid (0.91). These results indicated that the difference in mangrove leaf colors affects the amino acid contents in the leaves.