Respon Fisiologis Acalypha Indica terhadap Toksisitas Krom Heksavalen (Physiological Responses of Acalypha Indica to Toxicity of Hexavalent Chromium)
| Main Author: | Herlin Ully, Marsevi |
|---|---|
| Other Authors: | Kasmiyati, Sri |
| Format: | Thesis application/pdf |
| Bahasa: | ind |
| Terbitan: |
Program Studi Biologi FB-UKSW
, 2013
|
| Subjects: | |
| Online Access: |
http://repository.uksw.edu/handle/123456789/2732 |
Daftar Isi:
- Environmental pollution with hexavalent chromium has become a world-wide problem, and in recent there has been increasing concern because of their toxicity to microorganisms, plants, and animals. Phytoremediation uses plants to remove pollutans (such as heavy metals) from environment. The effectiveness of a phytoremediation is dependent on the selection of the appropriate plants. Phytoremediation of chromium still have problems because less plant species hyperaccumulator. In this study, physiological responses investigations were carried out in Acalypha indica with different levels of hexavalent chromium (as K2Cr2O7) in hydroponic culture. Different concentrations of K2Cr2O7 (0, 2.5, 5, 10, 25 and 50 ppm) applied in Hoagland medium. The experimet was conducted in completely randomized block design with five replications. Plants growth (number of leaves and plants height) were measured every 3 days from start of experiment up to 33 days. Photosynthetic pigment, plants biomass, length of roots and heksavalent chromium accumulation analysis were conducted at the end of experiment (33 days). The growth of Acalypha indica plants inhibited significantly at all level of hexavalent chromium treatments, as indicated by reduced number of leaves, plants height, plants biomass (shoot and root), and length of roots. Photosynthetic pigment of A. indica declined significantly at higher level of hexavalent chromium treatments (>10 ppm). Accumulation of hexavalent chromium in A. indica was observed to be dependent on its concentration and was greater in root ( 54 – 608 Î1⁄4g Cr6+g-1DW) than in leaves (66-157 Î1⁄4g Cr6+g-1DW). The highest efficiency of hexavalent chromium absorption by roots were showed at 50 ppm Cr6+ treatment (97. 07%).