HAMIM HAMIM
Departemen Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor

Published : 21 Documents
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Photosynthesis of C3 and C4 Species in Response to Increased CO2 Concentration and Drought Stress HAMIM, HAMIM
HAYATI Journal of Biosciences Vol 12, No 4 (2005): December 2005
Publisher : Bogor Agricultural University, Indonesia

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Abstract

Photosynthetic gas exchange in response to increased carbon dioxide concentration ([CO2]) and drought stress of two C3 (wheat and kale) and two C4 species (Echinochloa crusgallii and Amaranthus caudatus) were analysed. Plants were grown in controlled growth chambers with ambient (350 mol mol-1) and doubled ambient [CO2]. Drought was given by withholding water until the plants severely wilted, whereas the control plants were watered daily. Even though stomatal conductance (Gs) of C4 species either under ambient or double [CO2] was lower than those in C3, doubled [CO2] decreased Gs of all species under well watered conditions. As a result, the plants grown under doubled [CO2] transpired less water than those grown under ambient [CO2]. Photosynthesis (Pn) of the C4 species was sustained during moderate drought when those of the C3 species decreased significantly. Doubled [CO2] increased photosynthesis of C3 but not of C4 species. Increased [CO2] was only able to delay Pn reduction of all species due to the drought, but not remove it completely. The positive effects of increased [CO2] during moderate drought and the disappearance of it under severe drought suggesting that metabolic effect may limit photosynthesis under severe drought.
Kandungan IAA, serapan hara, pertumbuhan dan produksi jagung dan kacang tanah sebagai respon terhadap aplikasi pupuk hayati Wibowo, Sigit Tri; Hamim, Hamim; Wahyudi, Aris Tri
Jurnal Ilmu Pertanian Indonesia Vol 14, No 3 (2009): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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The aim of this research was to study IAA content, nutrient uptake, growth and productivity of maize and peanut in response to application of biofertilizer. The research was conducted in a green house of Cikabayan IPB Farm, Bogor Agriculture University, Darmaga, Bogor, West Java. A completely randomized design was applied in single factor experiment for maize and peanut with 3 replications. The treatments consisted of 4 factors: I. Without fertilizer, II. 100% biofertilizer (dosage 100g/pot), III. 100% inorganic fertilizer, and IV. Combination of biofertilizer and inorganic fertilizer with 50% dosage. Biofertilizer was applied using compost enriched by Pseudomonas sp., Bacillus sp., Azotobacter sp., Azospirillum sp., Rhizobium sp, and P-solubilising bacteria. The dosage of inorganic fertilizer was 0.5 gfpot of Urea; 0.5 g/pot of SP-36; 0.375 g/pot of KCI for maize, and 0.125 g/pot of Urea; 0.5 g/pot of SP-36; 0.375 g/pot of KCI for peanut. Application of biofertilizerenhanced auxin content of maize by 73-159°/o, but not in peanut. The treatment also increased the uptake of N,P, and K of both plants by 2 to 35 times as compared to control plant. The production increased by 270% onmaize and 66% on peanut due to application of biofertilizer. The result showed that application of compost enriched by microbial activator was able to supplement inorganic fertilizer for growth and production of maize and peanut.Keywords: Biofertilizer, nutrient uptake, hormone IAA, morphology responses.
PERTUMBUHAN TANAMAN JARAK PAGAR (Jatropha curcas L.) PADA LAHAN PASCA TAMBANG TIMAH DI BANGKA YANG DIBERI PUPUK ORGANIK Gedoan, Sukmarayu P; Hartana, Alex; Hamim, Hamim; Widyastuti, Utut; Sukarno, Nampiah
JURNAL ILMIAH SAINS Vol 11, No 2 (2011): Volume 11 Nomor 2, Oktober 2011
Publisher : Sam Ratulangi University

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PERTUMBUHAN TANAMAN JARAK  PAGAR (Jatropha curcas L.) PADA LAHAN PASCA TAMBANG TIMAH DI BANGKA YANG DIBERI PUPUK ORGANIK Sukmarayu P. Gedoan1), Alex Hartana2), Hamim2), Utut Widyastuti2) dan Nampiah Sukarno2) 1)Program Studi Biologi, FMIPA Universitas Negeri Manado di Tondano; 2)Departemen Biologi, FMIPA, Institut Pertanian Bogor, Bogor 16680   ABSTRAK Kegiatan penambangan timah menyebabkan perubahan karakteristik fisika dan kimia tanah sehingga menjadi tidak sesuai untuk pertumbuhan tanaman.  Tujuan penelitian ini untuk mempelajari pertumbuhan 7 aksesi jarak pagar yang ditanam pada lahan pasca tambang timah yang diberi kompos dan kotoran sapi.  Penelitian ini dilakukan di TSS 133, Kelurahan Sinar Baru, Kabupaten Bangka, Provinsi Bangka Belitung.  Penelitian lapangan dilaksanakan pada Bulan Mei 2007 sampai dengan Bulan Desember  2008.  Percobaan faktorial ini dirancang dalam Rancangan Petak Terbagi dengan tiga ulangan.  Petak utama adalah 7 aksesi jarak pagar yang terdiri atas: aksesi Madiun, Ponorogo, Jember, Dompu, Lampung, Bengkulu,  dan Sukabumi, sedangkan  anak petak berupa tanah tanpa pemberian kompos dan pupuk kandang (kontrol), kompos trubus 4 kg/lubang ditambah 4 kg tanah bagian atas  dan  kotoran sapi 4 kg/lubang ditambah 4 kg tanah bagian atas. Hasil penelitian menunjukkan bahwa pertumbuhan awal yang paling baik untuk tanah bekas tambang timah adalah pada aksesi Jember yang ditunjukkan oleh diameter batang, berat kering tanaman, berat kering tajuk dan berat kering akar.  Sedangkan tinggi tanaman tertinggi diamati pada aksesi Madiun.  Penambahan kotoran sapi dapat meningkatkan produksi biji dan kandungan minyak.  Produksi biji tertinggi diperoleh pada aksesi Bengkulu dan kandungan minyak tertinggi diperoleh pada aksesi Dompu. Kata kunci: aksesi, Jatropha curcas, kompos, kotoran sapi   THE GROWTH OF CASTOR OIL PLANT (Jatropha curcas L.) ON THE POST-TIN-MINING LAND IN BANGKA PROVIDED WITH ORGANIC FERTILIZER ABSTRACT The activity of tin mining changes the physical and chemical characteritics of soil, so that the soil isnot suitable for plant growth.  The objective of this research was to evaluate the growth of some accession of Jatropha curcas that we planted on post-tin-mining land provided with compost and cow feces.   This research was conducted in TS 133, Sinar Baru Village, District of Bangka, Province of Bangka Belitung.  This field research was carried out in May 2007 to December 2008.  Factorial experiment was designed as split plot with three replications.  The main plot was 7 accessions, i.e. Madiun, Ponorogo, Jember, Dompu, Lampung, Bengkulu, and  Sukabumi.  The subplot waskonds of organic fertilizer, i.e. top soil without addition of compost and cow fecer (control), trubus compost  (4 kg/hole) added with top soil (4 kg/hole), and cow feces (4 kg/hole) added with topbsoil (4 kg/hole). The result showed that Jember accession had the best early growth based on the observation of stem diameter, plant dry weight, and root dry weight.  The largest plant height was observed in Madiun accession.  The higest seed production was observed in Bengkulu accession and Dompu accession had the higest oil content.Keywords: accession, Jatropha curcas, , compost, cow feces
SISTEM PERTAHANAN TANAMAN KEDELAI YANG MENDAPAT PERLAKUAN CEKAMAN KEKERINGAN Violita, Violita; Hamim, Hamim
EKSAKTA Vol 2 (2010)
Publisher : FMIPA UNP

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Abstract

Defender system of plant to drought application were observed on 3 cultivated soy beans (Glycine max L.), and wild soybean (G. tomentella). The study was designed to exa mine relative water content (KAR) and antioxidant enzyme activity of soybean exposed to drought stress. Plants were grown in 8 kg pot containing soil and sand (1:1, v/v) in the greenhouse. Drought stress was provided by withholding water for 12 days (cultivated soybean) and 22 days (wild soybean). Observation was carried out by measuring media water content (KAM), KAR, and antioxidant enzymes activity. The drought caused dec rease of KAM and KAR of all plants. Antioxidant enzyme activities generally increased in response to drought until 10 days of the treatment, and then decreased when leaf KAR dropped below 50% (12 days after drought stressed for cultivated soybean and 18 days for wild soybean).   Keyword: drought, KAR, antioxidant enzyme
Physiological Responses and Fruit Retention of Carambola Fruit (Averrhoa carambola L.) Induced by 2,4-D and GA3 KURNIAWATI, BEKTI; HAMIM, HAMIM
HAYATI Journal of Biosciences Vol 16, No 1 (2009): March 2009
Publisher : Bogor Agricultural University, Indonesia

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Abstract

One of the problems in cultivation of carambola fruit is the high of flower and fruit drop during fruit development. To understand these problems and to improve fruit retention, the content of indole-3-acetic acid (IAA) and total sugar in carambola fruit and leaves were analysed in response to application of gibberellic acid (GA3) and 2,4-dichlorophenoxyacetic acid (2,4-D). The experiments used 1,5 year old of carambola plants (Averrhoa carambola L. var Dewi) grown in polybag of 40 x 50 cm. GA3 with the concentration of 0, 20, 40, and 60 ppm and 2,4-D of 0, 5, 10, and 15 ppm were applied to the flower and the supporting leaves of carambola plant. The parameters analysed were number of flower drop, fruit formation, fruit retention, number of harvestable fruit per cluster, fruit weight per cluster, the content of sugar in the leaves and IAA in the fruit. The result showed that IAA content of the fruit increased in response to single as well as combination of GA3 and 2,4-D application. Sugar content of the leaves also increased in response to GA3 and 2,4-D application; however, the pattern was different with that of IAA. The best treatment to improve fruit retention was a single application of 10 ppm 2,4-D or 60 ppm GA3, and combined application of 5 ppm 2,4-D and 60 ppm GA3. Key words: fruit drop, fruit retention, carambola fruit, auxin, gibberellin
REKAYASA EKSPRESI GEN PEMBUNGAAN Hd3a DIBAWAH KENDALI PROMOTER ROL C PADA JARAK PAGAR (Jatropha curcas L.) Sulistyaningsih, Yohana C; Hartana, Alex; Widyastuti, Utut; Hamim, Hamim; Suharsono, Suharsono
BERITA BIOLOGI Vol 10, No 6 (2011)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

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Abstract

Flowering in jatropha (Jatropha curcas L.) was considered as one of major factors that contribute to its productivity. Small number of female flowers produced in each inflorescence was believed as the main cause of low seed production.Introduction of Hd3a flowering gene driven by rol C promoter was supposed to improve total number of flowers including female flower.The objective of this research was to optimize cell proliferation and regeneration medium in Jatropha transformation method mediated by Agrobacterium, to obtain transgenic Jatropha containing Hd3a flowering gene as well as to understand the effect of this transgene on jatropha flowering character.Callus induction medium containing 0.5 mg/1 IBA added with 3 g/1 PVP produced the highest frequency of shoot formation.We obtained 26.67% to 33.33% putative transgenic plantlets that were able to grow in 40mg/l hygromycin selection medium. PCR analysis revealed that seven out of 10 putative transgenic plantlets were positively transgenic.Extremely early flowering character that was confirmed by histological analysis was also shown by some transgenic plantlets.
JABON (Anthocephalus cadamba Roxb) POTENCY FOR REMEDIATING LEAD (Pb) TOXICITY UNDER NUTRIENT CULTURE CONDITION Setyaningsih, Luluk; Setiadi, Yadi; Budi, Sri Wilarso; Hamim, Hamim; Sopandie, Didy
BIOTROPIA - The Southeast Asian Journal of Tropical Biology Vol 25, No 1 (2018)
Publisher : SEAMEO BIOTROP

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Abstract

Information on metal adaptation of plants is necessary to understand the mechanism of heavy metal, including lead (Pb), remediation mediated by forest plants in contaminated land. This study aimed to find out the adaptation mechanism of jabon (Anthocephalus cadamba Roxb) seedlings to excessive lead level based on the tolerance index of growth performance and lead transport to plant tissue.  The seedlings were exposed to lead (Pb(NO3)2) with the concentrations of 0, 0.5, 1, 1.5, 5 and 10 mM in nutrient culture for 15 days. The result showed that the tolerance index (TI) of the seedlings was significantly decreased by Pb exposure up to 1.5 mM, but the TI values were more than 75%.  All seedlings died at Pb concentration of 5 mM and up.  Pb accumulated in all parts of the seedlings, with the highest concentration found in the leaves (735.9 ppm) under Pb concentration of 0.5 mM.   The Pb was found to be transported to the top portion of the seedlings indicated by Transport Factor (TF) that was more than 1. The results suggest that jabon can adapt to excessive Pb exposure up to 1.5 mM and has the potential as a remediator plant.
STRATEGI KOMUNIKASI PUBLIC RELATIONS DINAS KOMUNIKASI DAN INFORMATIKA PROVINSI JAWA TIMUR UNTUK MENINGKATKAN CITRA DI MATA PUBLIK Mardiana, Wike; Hamim, Hamim; Widiyanto, Kendry
JURNAL REPRESENTAMEN Vol 3, No 02 (2017)
Publisher : Universitas 17 Agustus 1945 Surabaya

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The purpose of this study is to provide an overview of communication strategy of PublicRelations that executed by DinasKomunikasidanInformatika of East Java Province in order toimprove positive image according to Two-Way Symetric theory and supporting theory by HaroldLasswell. The writer applies descriptive qualitative method in compiling this thesis. DinasKomunikasidanInforatika of East Java Province. The purpose of this study is to explain anyphenomenon in details by specific data collection. This study describing communication strategy ofPublic Relations that executed by DinasKomunikasidanInformatikaof East Java Provience. The resultof study shows that strategy executed by DinasKominfo to improve their image in front of public areby creating website, creating facebook account, and creating twitter account in order to ease public inmaking any complain and to ease public finding any information. Public Relations DinasKominfousing two approaching strategy including persuasive and educative approaching, and cooperationapproaching with internal public and external public.Keywords : Public Relations Strategic, Dinas Komunikasi dan Infromatika Provinsi Jawa Timur,Image.
ANALISIS INTERAKSI SIMBOLIS BATU AKIK BACAN DI KALANGAN MASYARAKAT SURABAYA) Ningsih, Sri Wahyu; Hamim, Hamim; Soenarjanto, Bagus
JURNAL REPRESENTAMEN Vol 2, No 01 (2016)
Publisher : Universitas 17 Agustus 1945 Surabaya

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Research agate phenomenon as a symbol of this communication in the background agate background bythe icon as a symbol of social status differentiation in terms of both wealth and culture as well. Problemsof this research is the type of agate Bacan able to become a symbol of communication amongmasyarakat.Penelitian aims to determine the message symbols in agate frequently in associate withwealth and status sosial.penelitian using qualitative research The results of the study show that thesymbol is Non-verbal manifestation of a culture intent contained therein, as a symbol of social statusdifferentiator differentiator as well as cultural diversity. In relation to the communication titlephenomenon agate as a symbol of communication close relation to verbal communication which refers tospeech and non-verbal communication can be the symbol of the emblem as violence rocks / scale mohsand also fiber stone, whereas the results of research by the author intervenes after the interview is fromsome informants one of academics statement on responsible is in accordance with the theory of symbolicinteraction that communication tidah only through language but there are symbols that agreed upon inaddition to non-language and theories of social behavior by Albert Bandura that the individual isinfluenced by the social environment in if the surrounding environment fond agate then that individualwill have a tendency to follow the social life also has agate want.Keywords : Symbolic interaction, culture, agate Bacan.
Respon Pertumbuhan Spesies C3 dan C4 terhadap Cekaman Kekeringan dan Konsentrasi CO2 tinggi Hamim, Hamim
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 3 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

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Abstract

Growth response of two C3 (wheat and kale) and two C4 species (Echinochloa crusgallii and Amaranthus caudatus) were analyzed in response to drought stress under different CO2 concentrations, i.e. ambient (350 ppm) and double ambient (700 ppm).  Drought was given by withholding water for several days until the plants were wilted.  Drought stress reduced relative water content (RWC), water potential (Yw), osmotic potential (Ys), net photosynthesis (Pn) and plant growth of all species.  During moderate drought Pn of C3 species decreased considerably, while that of C4 species was still sustained, suggesting that C4 cycle is important to sustain Pn during the beginning of the drought.  Doubled [CO2] enhanced growth of all species indicated by increase of plant height and leaf area, but the growth of C3 species was higher than that of C4 one.  Increase of growth due to high [CO2] was associated with an increase of Pn in C3 species but not in C4 species.  High [CO2] caused C4 species had RWC, Yw and Ys higher than C3 species during drought stress.  Increase of growth in C4 species may be associated by an increase of plant water status due to high [CO2].