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Jurnal Akademika Biologi
Published by Universitas Diponegoro
ISSN : -     EISSN : 26219824     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology
Jurnal Akademika Biologi diterbitkan oleh Departemen Biologi Fakultas Sains dan Matematika Universitas Diponegoro Semarang. Jurnal ini sebagai media publikasi hasil karya ilmiah lulusan S1 Departemen Biologi. Jurnal Akademika Biologi menerima artikel-artikel yang berhubungan dengan bidang ilmu biologi.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 234 Documents
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PENGARUH PUPUK NANOSILIKA TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN KAPAS (GOSSYPIUM HIRSUTUM L. VAR. KANESIA 8) Atin Temon Sari; Sri Widodo Agung Suedy; Sri Haryanti
Jurnal Akademika Biologi Vol. 6 No. 2 April 2017
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Cotton (Gossypium hirsutum L.) is one of agricultural commodity which produces natural fiber as a raw material for the textile industry has a lot of constraints in its cultivation which not optimal, so the improvement of cultivation techniques by performing a balanced fertilizer can be done. Indonesian agricultural soil generally has low fertility rate and silica availability, so silica fertilization would be necessary. Silica causes leaves and stems of plant become upright so the photosynthesis will increased. Nanosilica that contains very small elements of silica which makes it easily absorbed by plants in order to increase growth and yield of cotton. This research aims to determine the effect of nanosilica fertilizer to the growth and production and also to know the effective amount of nanosilica concentration which will increase it of cotton Kanesia 8. The study design was using RAL with 5 different treatments of nanosilica fertilizer amount: 0 ml/L, 2.2 ml/L, 4.2 ml/L, 6.2 ml/L dan 8.2 ml/L with 5 repetitions. The data analysis was using ANOVA and if there is a significantly different then the analysis followed by further test of Duncan's Multiple Range Test (DMRT) at 95% of significance level. The results showed that nanosilica fertilizer with a concentration 2.2 ml/L increased the plant growth mainly at fresh weight of plant by 74.62% and dry weight of plant by 33.66% and it also increased the production of plant mainly in the percentage of fruit changed into cotton by 19.71% and dry weight of cotton by 0.98% than the control treatment.Keywords: nanosilica, growth, production, Gossypium hirsutum
Pertumbuhan Populasi Mikroalga Spirulina platensis (Geitler) Pada Konsenterasi Logam Berat Tembaga (Cu) Danu Maulana
Jurnal Akademika Biologi Vol. 3 No. 1 Januari 2014
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

One of heavy metal which is a source of pollution and need to be minimized its concentration on water is heavy metal cooper (Cu). In humans, chronic Cu poisoned lead to liver cirrhosis, brain damage, kidney damage and deposition of Cu in the cornea of the eye. The concentration of heavy metals in water can be remediate using microalgae, related to its biosorption potential some research on heavy metal binding ions to microalgae has been done, species Chlorella vulgaris, Phormidium sp., Dunaliella tertiolecta, Nostoc sp., Euglena gracilis has a high tolerance to heavy metal ions. The purpose of this study is to examine the effect of heavy metals Cu on populations of S. platensis and determine a decrease in the concentration of heavy metals Cu  in cultures of S. platensis, compared to the long presentation time. Research using 4 treatment concentrations of Cu  ie 0; 1; 3; and 5 mg / l with 3 replications respectively. The results showed the concentration of Cu treatment affects the population growth of S. platensis. S. platensis able to decrease the concentration of Cu in the culture medium. The larger the population of S. platensis, the greater absorption of Cu by the cell. The decrease percentage in Cu in the medium is directly proportional to the exposure time needed. S. platensis can be used as fikoremediator of heavy metal Cu at a concentration 1 mg / l of Cu.Keywords: Spirulina platensis, Fikoremediation, Biosorption, Heavy metals, Cu.
Kemampuan Antagonisme Pseudomonas sp. dan Penicillium sp. Terhadap Cercospora nicotianae In Vitro Muhammad Bismar Iskandar putra; Susiana Purwantisari
Jurnal Akademika Biologi Vol. 7 No.3 Juli 2018
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Antagonisme merupakan mekanisme suatu mikroorganisme dalam melakukan penghambatan terhadap organisme lainnya. Mekanisme penghambatan ini dapat dilakukan dengan adanya produksi senyawa antibiotik untuk menghambat pertumbuhan organisme lainnya. Pada penelitian ini, pengujian kemampuan antagonisme memanfaatkan Pseudomonas sp. dan Penicillium sp. yang diujikan pada jamur patogen Cercospora nicotianae. Penelitian ini bertujuan untuk mengetahui kemampuan antagonisme dari Pseudomonas sp. dan Penicillium sp. dalam mekanisme penghambatannya terhadap jamur patik Cercospora nicotianae. Parameter yang diamati dalam penelitian ini yaitu pengamatan mikroskopis bentuk morfologi hasil isolasi Cercospora nicotianae, pengamatan mikroskopis bentuk morfologi hasil isolasi Penicillium sp., inokulasi bakteri Pseudomonas sp., dan pengujian antagonisme Pseudomonas sp., Penicillium sp. terhadap Cercospora nicotianae. Hasil pengamatan secara mikroskopis pada isolasi Cercospora nicotianae memiliki morfologi konidia bersekat dan tidak berwarna, konidiofor meruncing pada bagian ujungnya. Pengamatan mikroskopis pada isolasi Penicillium sp. menunjukkan kenampakan mikroskopis seperti sapu, terdapat konidia, phialid, dan konidiofor, konidiumnya berbentuk rantai. Berdasarkan hasil penelitian ini, pertumbuhan miselium Cercospora nicotianae mulai terlihat pada masa inkubasi hari ke-3, sedangkan pada Penicillium sp. optimal pertumbuhannya terlihat pada masa inkubasi hari ke-7. Hasil pengujian antagonisme Pseudomonas sp. dan Penicillium sp. setelah diinkubasikan selama 4 hari pada media yang berisi jamur patogen Cercospora nicotianae menunjukkan pada Pseudomonas 1, persentase daya hambatnya 43,4% dan pada Pseudomonas 2, persentase daya hambatnya 43,4%. Pengujian pada Penicillium sp. 1 menunjukkan persentase daya hambat sebesar 58,6% dan Penicillium sp. 2 persentase daya hambatnya 60,8%. Hal ini menunjukkan bahwa Penicillium sp. memiliki kemampuan antagonisme yang lebih kuat dibandingkan Pseudomonas sp.    
ISOLASI DAN KARAKTERISASI BAKTERI PENDEGRADASI PESTISIDA DICOFOL DARI TANAH SAWAH DI KABUPATEN KARAWANG Anindita Ayu Pratiwi; Agung Suprihadi; Budi Raharjo; Priyo Wahyudi; Sih Parmiyatmi
Jurnal Akademika Biologi Vol. 1 No. 1 Oktober 2012
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Karawang was the center of rice production, but rice production in paddy fields in Karawawang often faces obstacle hopper pest that caused crop failure. These condition prompted the farmers to using dicofol pesticides excessively, thus caused pollution of pesticides. The purpose of this research were get the isolates bacteria that could degrade the pesticide dicofol in Karawang paddy fields and discovered characteristics of bacteria that have potential to degrade pesticides. The research was conducted with the isolation and characterisation of bacteria from Karawang paddy soil, the characterisation of isolates bacteria by observation morphological and phenotypic include staining Gram and biochemical tests, test isolates bacteria resistence of dicofol, measuring the growth curve and High Performance Liquid Chromatography (HPLC) for discovering of decreased dicofol concentration during 24, 48, and 72 hours of incubation time. The result is six isolates, that are AA1, AA2, AA3, AA4, AA5, and AA6. Isolates AA1 is suspected as genus Phenylobacterium, isolates AA3 and AA6 are suspected as genus Pseudomonas, AA4 isolates is suspected as genus Bacillus, isolates AA5 is suspected as genus Alcaligenes, but isolates AA2 not yet be identified. The results indicate that isolate AA6 has most resistent to dicofol and most number of cells bacteria, that is 7.9x108. Isolate AA6 is also the most effective in degrading dicofol as much as it can reduce the concentration in amount of 76.0 ppm (84.45%) in MSM medium + 90 ppm dicofol. Keywords : Isolation, Characterisation, Bacteria, Resistention, Degradation, Dicofol Pesticide
Interaksi Antara Aplikasi Gelombang Suara Sonic Bloom dan Jenis Pupuk Cair Terhadap Jumlah dan Pembukaan Stomata serta Pertumbuhan Tanaman Jagung (Zea mays L.) Mentari Putri Pratami; Sri Haryanti; Munifatul Izzati
Jurnal Akademika Biologi Vol. 4 No. 1 Januari 2015
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Sonic bloom sound waves at a frequency of 3500-5000 Hz is able to stimulate the openedstomata which incrases the rate and efficiency of nutrients absorption that are applied through the leaves that are beneficial to the plant. By adding liquid organic and inorganic fertilizer as an effort to enhance the growth of cornplant. The purpose of this research is to know thesonic bloom application and liquid fertilizer to the growth of cornplant. This research was conducted in July until November 2014 in Laren village, sub district of Bumiayu, Brebes Regency and Laboratory structure and function of plant biology, FSM Diponegoro University. The arrangment used is the full factorial pattern of random design (RAL) with two factors, namely the sonic bloom application and liquid fertilizer. This research using six treatments, each of treatment are three replicates. The analysis of data used is Analysist of Variances (ANOVA), if it shows significant results then continued with the test duncan’s multiple test (DMRT)in fact 95% level. Parameters were observed such as number of stomata, the length and width of the opened stomata, height of plant, number of leaves,weight on fresh, weight on dry. The result showed that the application of sonic bloom real effect aganist the length and width of the opened stomata, number of leaves, weight on dry. By adding liquid fertilizer have the real effect of the lenght and width of the opened stomata, high of plants, weight on fresh, weight on dry. Furthermore giving of liquid organic fertilizer has more optimal result.Keywords :corn (Zea mays L.), sonic bloom, liquid fertilizer, stomata, growth.
PENGARUH NAUNGAN MENGGUNAKAN PARANET TERHADAP PERTUMBUHAN SERTA KANDUNGAN KLOROFIL DAN β KAROTEN PADA KANGKUNG DARAT(Ipomoea reptans Poir) Ika Wulandari; Sri Haryanti; Munifatul Izzati
Jurnal Akademika Biologi Vol. 5 No. 3 Juli 2016
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Kangkung is one of the of the most favourite vegetable of Indonesian people. Most of indonesian including low-class to high-class like to consume it. Kangkung is often coocked as many different kind of dish such as, gado-gado, tumis kangkung, sayur bening, pecel. That is the proof from social side that Indonesian people can accept kangkung to become daily consumption. The purpose of this research is to analyze the effect of shade on growth, chlorophyll, carotenoid content of kangkung. The Parameters were plant height, number of leaf, root length, fresh weight of plant, number of stomata, chlorophyl content and β carotene content. This research was conducted at the Laboratory of the BSF Plant of Department of Biology Undip FSM. This research ks designed using shade as one factor RAL. Data analysis was using ANOVA at significance level of 95%, if there is significant difference than continued with Duncan Multiple Range Test (DMRT). The results show that different shade makes no significant different on plant height, number of leaf, fresh weight of plant, number of stomata, β carotene content but tend to increase yet decrease chlorophyll content. Using shade with two layers of paranet result in the lowest of chlorophyl content, but the most of β carotene content if compared to the others treatment.Keyword : shade, kangkung, chlorophyll, β carotene
PREFERENSI PELETAKAN TELUR DAN PENGHAMBATAN PERKEMBANGAN PRADEWASA NYAMUK Aedes aegypti L. DI BERBAGAI MEDIA AIR Makna Fathana Sabila; Rully Rahadian; Jafron Wasiq Hidayat
Jurnal Akademika Biologi Vol. 2 No. 4 Oktober 2013
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Water media influences the effectiveness of the use of ovitrap media for Ae. aegypti. Water media which is prefered by the mosquito as well as inhibition the premature growth have huge potency in controlling Ae. aegypti. The objective of this study were to investigate the preference of oviposition of Ae. Aegypti and to determine the premature growth of Ae. aegypti in water media containing a combination of organic matter and different chlorine concentrations, also to examine the interaction between organic matter and chlorine to the preferences of oviposition and the premature growth of Ae. Aegypti. The method of this study is done by experiment by applying Completely Randomize Design (RAL). This study used two types of water media combination. The media combinations contained organic materials and chlorine with seven different treatments. They were well water (control), water added with soil and hay-soaked water added with chlorine by 5, 10, and 15 ppm respectively. The findings show that Ae. aegypti have the tendency in choosing hay-soaked water in lay the eggs since it has abundant content of organic matter in it. The mean amount of Ae. aegypti oviposition in the water medium combination ranged from 84 to 152.7 eggs, while the percentage of premature survival rate ranged from 59.4% to 97%. In conclusion, the study showed that the preference of oviposition is highly influenced by the organic matter content of the media. Both organic matter and chlorine do not inhibit the premature growth of Ae. aegypti. However, the interaction between organic matter and chlorine to the preferences of oviposition and the premature growth of Ae. aegypti was not found. Keywords: Aedes aegypti, combination, ovitrap, organic matter, chlorine.
KEANEKARAGAMAN JENISTUMBUHAN PAKU (PTERIDOPHYTA) DI JALUR PENDAKIAN SELO KAWASAN TAMAN NASIONAL GUNUNG MERBABU, JAWA TENGAH Fitri Kusuma Astuti; M Murningsih; J Jumari
Jurnal Akademika Biologi Vol. 6 No. 2 April 2017
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Indonesia has a very high biodiversity, as well as ferns (Pteridophyta).Selo climbing lane at Merbabu Montain Nasional Park selected as the study site because of the many ferns that were founded in this area.The purpose of this study was to analyze the diversity of ferns species.in tropical rain forest ecosystem of high mountains and sub-alpine forests ecosystem on Selo climbing lane at Merbabu Mount National Park. There are many human activity in Selo climbing lanesupposed to influence the existing plants. This research was held on August-December 2016. The method usedinventory inSelo climbing lane and Plot, then analyzed using diversity index. The results found 33 species of ferns from 15 families. The diversity of ferns in the tropical rain forest ecosystem of high mountains fall into the medium category except at post II (2412 masl) has low diversity. Diversity in the sub-alpine forest ecosystem can not be calculated. Key word: diversity, fern, Selo climbing lane.
Biodegradasi Senyawa Hidrokarbon Oleh Strain Bacillus cereus(VIC) Pada Kondisi Salinitas Yang Berbeda Reza Auliarahman Bhaktinagara; Agung Suprihadi; Budi Raharjo
Jurnal Akademika Biologi Vol. 4 No. 3 Juli 2015
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Bacillus cereus has been noted as hydrocarbonoclastic microbe that has ability to degrade hydrocarbons in non-saline conditions and some often to be found on high salinity environtment conditions. The purpose of this research is to determine the ability of strains Bacillus cereus (VIC) were isolated from non-saline environment to degrade hydrocarbons in crude oil on the different salinity condition. Bacillus cereus (VIC) was inoculated on the medium that has contaminated by crude oil with salinity level of 0,3 , 9,4 , dan 19,6 and incubated for 15 days. Determination of microbial growth is by using Total Plate Count (TPC) method along with determination of Total Petroleum Hydrocarbon (TPH) percentage using gravimetry method for every 5 day. The determination of microbial growth showed that Bacillus cereus (VIC) has the tolerancefor salinity level up to 19,6 because it is able to grow to a density of 6.9 x 106 CFU/ml on the 15th day. Bacillus cereus (VIC) is also able to degrades hydrocarbons on crude oil pollutants that indicated from degradation of TPH percentage in the medium up to 21% during 15 days incubation period on the medium with salinity level of 19,6 . Biodegradation using Bacillus cereus (VIC) can increase TPH degradation on the medium up to 19,8% than TPH degradation because of weathering. Keywords: Biodegradation, Bacillus cereus(VIC), Total Petroleum Hydrocarbon (TPH), Salinity.
RESPON PEMBERIAN PUPUK UREA DAN PUPUK KANDANG SAPI TERHADAP PERTUMBUHAN DAN KANDUNGAN MINYAK ATSIRI TANAMAN JAHE MERAH [Zingiber officinale (L.) Rosc var. rubrum ] Linda Saputri; Endah Dwi Hastuti; Rini Budi Hastuti
Jurnal Akademika Biologi Vol. 7 No. 1 Januari 2018
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Red Ginger plant is one of the export commodities and has benefits as perfume industry, cosmetics, health, and spices. Currently, the volume of demand for ginger products continues to increase, but the demand has not been met because of low productivity so that the need for intensification and provision of fertilizer. The purpose of this research is to study the effect of urea and cow manure on the growth of red ginger plants and to study the type of urea fertilizer and cow manure that gives maximum effect to growth and the essential oil content of Ginger Red plant. Observed parameter include plant height, leaves numbers, plant wet weight, and essential oil content. The study used Completely Randomized Design (RAL) with 4 treatments and 3 replications. Intended treatments are without fertilizer, with cow manure, with urea fertilizer, and with combination of urea fertilizer and cow manure. Data were analyzed with Analysis of Variance (ANOVA) at 95% significant level. Red ginger plants gave cow manure 150 g / polybags tend to produce plant height, plant wet weight, and higher essential oil content. Key Words : Growth, red ginger, urea fertilizer, cow manure

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