Organic Acid Characteristics and Tolerance of Sengon (Paraserianthes falcataria L Nielsen) to Lead

  • Luluk Setyaningsih Graduate School of Bogor Agricultural University, Dramaga Main Road, Campus IPB Dramaga, Bogor 16680, Indonesia
  • Yadi Setiadi Department of Silviculture, Faculty of Forestry, Bogor Agricultural University, Academic Ring Road, Campus IPB Dramaga, PO Box 168, Bogor 16680, Indonesia
  • Didy Sopandie Department of Agronomi, Faculty of Agriculture, Bogor Agricultural University, Meranti Road, Campus IPB Dramaga, Bogor 16680, Indonesia
  • Sri Wilarso Budi Department of Silviculture, Faculty of Forestry, Bogor Agricultural University, Academic Ring Road, Campus IPB Dramaga, PO Box 168, Bogor 16680, Indonesia
Keywords: lead, sengon, tolerance, organic acid, liquid nutrient culture

Abstract

This study aimed to find out the lead tolerance of sengon (Paraserianthes falcataria) seedling based on growth performance, tolerance index, and ecretion and accumulation of organic acids content. Seedlings were exposed to lead (Pb) with the concentration of 0, 0.5, 1, 1.5, 5, and 10 mM in liquid nutrient culture for 4 days in order to investigate secretion and accumulation  of  oxalic, malic, and citric content, and for 15 days to examine growth performance and olerance index. The result showed that tolerance index and growth performance of engon seedling were insignificant (p > 0.05) to the rising of Pb concentration up to 1.5 mM with tolerance index at least 95%, and even caused an increase of fresh weight.  However, the tolerance index and growth of sengon  decreased significantly due to Pb exposure of 5 and 10 mM.  Among the three organic acids, citrate was most dominant as compared to malate and oxalate. Secretion of citrate increased significantly (p < 0.05) with the rising concentration of Pb 0.5, 1 and 1.5 mM,  reaching to 0.464, 0.540, and 0.587 µg mℓ-1, respectively, or rising according linear line (r = 0.9, p < 0.5).  Citrate accumulation showed inconsistent pattern with the rising Pb exposure.  The result suggested that sengon seedling have a slightly tolerance to lead by secretion of organic acid especially citric acid.

How to Cite
Setyaningsih, L., Setiadi, Y., Sopandie, D., & Budi, S. W. (1). Organic Acid Characteristics and Tolerance of Sengon (Paraserianthes falcataria L Nielsen) to Lead. Jurnal Manajemen Hutan Tropika, 18(3), 177-183. Retrieved from http://journal.ipb.ac.id/index.php/jmht/article/view/6004
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Articles