Respon Pertumbuhan dan Konsentrasi Rantai Panjang Polyisoprenoid terhadap Cekaman Garam pada Mangrove Sonneratia alba Smith

Abstract

LATIFAH NUR SIREGAR : Salt Stress Response on Growth and Long-Chain Polyisoprenoid Concentration in Mangrove Sonneratia alba Smith. Supervised by MOHAMMAD BASYUNI and LOLLIE AGUSTINA P. PUTRI. Mangrove is one of the richest bioactive source naturally and is able to remove excess of salt. The purpose of this study was to determine the best salt stress concentration for growth of S. alba seedlings and to evaluate effect of salt stess on polyisoprenoid composition. S. alba seedlings were used with 5 treatments namely 0%, 0,5%, 1,5%, 2%, and 3% grown for 3 months. Results showed that optimum growth for S. alba seedlings characterized by height, diameter, and dry weight of root in 1,5% salt stress, the best number of leaves and moisture content of root were in 0,5% salt stress. On the other hand, dry weight of shoot , moisture content of shoot, and ratio of shoot to root were found in 3% salt stress, respectively. Analysis of Polyisoprenoid in S. alba seedlings in 3% salinity was higher concentration than 0% treatment.