Accumulation and adaptation of perumpung (Phragmites karka) to iron ion stress in hydroponic media

Abstract

Acid sulphate soils containing very high iron is a barrier to agricultural development in coastal areas. Also known, Perumpung (Phragmites karka) grows in coastal marshes. This experiment was conducted to determine the adaptation of the Perumpung to iron ion stress, and also its accumulation rate in hydroponic media. Hydroponic nutrient solution (referring to Hoagland solution) is used to support the growth of the Perumpung seedlings, and adding iron solution as a contaminant at five different concentrations of 0 (without addition), 25 mgL-1, 50 mgL-1, 100 mgL-1 and 150 mgL-1. After 45 days of treatment, the results showed that Perumpung which was placed in a addition iron solution of 150 mg/L contaminant was dead, while the growth of Perumpung at 25 mgL-1 iron addition concentration was not disturbed. The rate of iron absorption was 100 mgL-1 > 50 mgL-1 > 0 mgL-1 > 25 mgL-1, respectively. Iron metal is stored in roots more than leaves/shoots.