Peningkatan efektivitas penyerapan Pb pada perakaran tanaman sengon (Paraserianthes falcataria (L.) Nielsen) terinfeksi mikoriza

Alfiyah, Nurul (2015) Peningkatan efektivitas penyerapan Pb pada perakaran tanaman sengon (Paraserianthes falcataria (L.) Nielsen) terinfeksi mikoriza. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Logam berat timbal (Pb) merupakan pencemar logam berat utama di semua lingkungan dan sumber utama pencemaran tanah karena cenderung terakumulasi dalam tanah. Timbal ketika mencemari tanah, akan bertahan lama dibandingkan dengan kebanyakan polutan lainnya karena mempunyai kelarutan yang rendah, akan tetapi timbal dapat diikat oleh agen pengkelat (glomalin) yang disekresikan oleh mikroorganisme yaitu fungi mikoriza sehingga dapat diserap oleh fungi dan tanaman. Mikoriza merupakan bentuk simbiosis mutualismes antara fungi dengan perakaran tanaman. Oleh karena itu, salah satu pilihan untuk mengatasi pencemaran timbal yaitu dengan menggunakan tanaman sebagai agen remediasi (fitoremediasi) dan dipercepat dengan mikoriza Glomus sp. yang dapat membantu dalam penyerapan dan akumulasi Pb di akar tanaman sengon. Penelitian ini bertujuan untuk mengetahui akumulasi logam Pb pada perakaran tanaman sengon (P. falcataria (L.) Nielsen) yang terinfeksi mikoriza Glomus sp. serta pertumbuhan tanaman P. falcataria dalam media tercemar logam berat Pb. Penelitian ini menggunakan 5 perlakuan dosis mikoriza yaitu 0 gram mikoriza tanpa Pb (kontrol negatif), 0 gram mikoriza dengan Pb (kontrol positif), 25 gram mikoriza+Pb, 50 gram mikoriza+Pb, 75 gram mikoriza+Pb dan dilakukan dengan 4 ulangan pada masing-masing perlakuan. Masing-masing tanaman diberi penambahan Pb(NO3)2 dalam media tanam sebanyak 833 mg/kg. Parameter yang diamati yaitu tinggi tanaman, panjang akar, berat kering tanaman dan akumulasi Pb di akar tanaman sengon. Hasil penelitian menunjukkan bahwa dosis 75 gram mikoriza Glomus sp. merupakan dosis yang paling berpengaruh terhadap pertumbuhan tanaman sengon yang ditumbuhkan pada media tanam yang mengandung logam Pb pada parameter tinggi tanaman dengan nilai 77,5 cm, berat kering yaitu 17,86 gram dan panjang akar yaitu 31,5 cm. Penambahan dosis 25, 50, 75 gram Glomus sp. juga meningkatkan penyerapan serta akumulasi logam Pb pada akar tanaman sengon dengan nilai masingmasing yaitu 2,25 ppm, 3,49 ppm dan 3,60 ppm. =================================================================================================== Heavy metal lead is one of the main pollutan in almost of environment and also well known as a main pollutant in soil, since its were excellently accumulated in soil. Lead in soil will remain in long time, since its have a low solubility and relatively free from microorganisms degradation. Howevwr of lead can be fastened by an glomalin that is secreted by microoganisms is mycorrhizal fungi so that can be absorbed by fungi and plant. Mycorrhizal is a symbiotic mutualismes of fungi with rooting plants. Hence, one option to overcome lead pollution that is by using plants as phytoremediation agent and accelerated by mychorrhizal Glomus sp. which can assist in the absorption and accumulation of Pb in roots of sengon. The purposes to know the accumulated lead on plant rooting sengon (P. falcataria (L.) Nielsen) infected with Glomus sp. mycorrhiza and plant growth of (P. falcataria (L.) Nielsen) in heavy metal lead contaminated media. This research used five variations of the mycorrhizal doses with replications, i.e. 0 gram of mycorrhizae without Pb (negative control), 0 grams of mycorrhizae with Pb (positive control), 25 grams of mycorrhizae with Pb, 50 grams of mycorrhizae with Pb, 75 grams of mycorrhizae with Pb. Every plant which has been given a dose of mycorrhizae also given Pb(NO3)2 in the medium as much as 833 mg / kg. The observed parameters i.e. heigth plant, roots length, and plant dry weight. The results showed that 75 gram dose of mycorrhizal Glomus sp. was the most effect on the growth of sengon plant with parameters of plant’s height with a value of 77,5 cm, roots length of 31,5 cm and plant’s dry weight of 17,86 grams. The addition 25, 50 and 75 Grams dose of mycorrhizal Glomus sp. also increased the absorption and accumulation of Pb in the roots sengon (P. falcataria), with the value of each 2,25 ppm, 3,49 ppm and 3,60 ppm.

Item Type: Thesis (Undergraduate)
Additional Information: RSBi 579.517 85 Alf p
Uncontrolled Keywords: Glomus sp., Logam Berat Pb, Paraserianthes falcataria (L.) Nielsen
Subjects: Q Science > QH Biology > QH75 Nature conservation. Landscape protection. Biodiversity conservation. Endangered species and ecosystems (General). Habitat conservation. Ecosystem management. Conservation biology
Divisions: Faculty of Mathematics and Science > Biology > 46201-(S1) Undergraduate Thesis
Depositing User: - Taufiq Rahmanu
Date Deposited: 22 Nov 2019 06:25
Last Modified: 22 Nov 2019 06:25
URI: http://repository.its.ac.id/id/eprint/71972

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