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All Journal Jurnal Silvikultur Tropika (JST) Jurnal Penelitian Hutan Tanaman

Iskandar Z. Siregar

Institut Pertanian Bogor

Author-ID : 2634370

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Environmental Science Social Sciences

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FAKTOR BUDIDAYA DAN KAITANNYA DENGAN KEPARAHAN PENYAKIT KARAT PURU PADA SENGON (Falcataria moluccana (Miq.) Barneby & J.W. Grimes) Neo Endra Lelana; Suryo Wiyono; Giyanto Giyanto; Iskandar Z. Siregar
Jurnal Penelitian Hutan Tanaman Vol 15, No 1 (2018): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

ABSTRACTUntil now, gall rust disease is a major threat for Falcataria moluccana plantations in Indonesia. One of the environmental factors that can influence the development of plant diseases is the cultivation practice. However, the studies related to the influence of cultivation practice to the F. moluccana gall rust disease are still limited. This study aimed to determine the correlation between cultivation practice to the incidence and severity of F. moluccana gall rust disease. The incidence and severity of F. moluccana gall rust disease were observed from 47 planting sites distributed throughout Java. Its correlation to the cultivation practice was analyzed using chi square analysis followed by coordinate analysis. The results indicated that 6 of 13 variables were significantly correlated with disease incidence. Meanwhile, only 3 of 13 variables were significantly correlated to disease severity. These factors were plant age, use of organic fertilizer, and chemical control. Based on coordinate analysis result, organic fertilizer and chemical control application showed strong association with low level disease severity.Keywords: Chemical control, Java, organic fertilizer, plant age ABSTRAKPenyakit karat puru masih menjadi permasalahan yang utama pada tanaman sengon di Indonesia. Tanaman sengon dapat diserang pada semua tingkatan umur dan telah menimbulkan kerugian yang signifikan. Salah satu faktor lingkungan yang memengaruhi perkembangan penyakit tanaman ialah faktor budidaya. Penelitian ini bertujuan untuk mengetahui hubungan antara faktor budidaya dengan insidensi dan keparahan penyakit karat puru pada sengon. Sebanyak 47 lokasi penanaman sengon yang tersebar di seluruh Jawa diamati insidensi dan keparahan penyakitnya. Hubungannya dengan faktor budidaya dianalisis menggunakan Khikuadrat yang dilanjutkan dengan analisis korespondensi. Hasil penelitian menunjukkan sebanyak 6 dari 13variabel faktor budi daya menunjukkan korelasi yang signifikan terhadap insidensi penyakit. Sementara itu terhadap keparahan penyakit, sebanyak 3 dari 13 variabel faktor budidaya menunjukkan korelasi yangsignifikan. Ketiga faktor tersebut yaitu umur tanaman, penggunaan pupuk organik, dan pengendalian kimiawi. Hasil analisis korespondensi menunjukkan faktor penggunaan pupuk organik dan pengendalian secara kimiawi berasosiasi dengan keparahan penyakit yang rendah.Kata kunci: Jawa, pengendalian kimiawi, pupuk organik, umur tanaman

KONFIRMASI JENIS DAN KERAGAMAN GENETIK SENGON RESISTEN DAN RENTAN INFEKSI KARAT TUMOR MENGGUNAKAN PENANDA DNA KLOROPLAS (Species confirmation and genetic diversity of Gall-rust resistant and susceptible sengon using chloroplast DNA marker) Hasyyati Shabrina; Ulfah J. Siregar; Deden D. Matra; Iskandar Z. Siregar
Jurnal Penelitian Hutan Tanaman Vol 17, No 2 (2020): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpht.2020.17.2.117-130

ABSTRACTSengon (Falcataria moluccana) plantations, particularly in Java, have been facing threats from gall-rust disease caused by the pathogen Uromycladium falcatariae, which has caused considerable economic losses. Other species with morphological similarities with F. moluccana raises the question of whether the infected and non-infected sengon are the same species. This study aimed to confirm the haplotype of infected and non-infected sengon by gall-rust and compare them with a morphologically similar species of Albizia chinensis using the psbA-trnH intergenic spacer region molecular marker on chloroplast DNA. Wet wood samples from 32 infected plants and 32 non-infected plants were collected from Bogor and Ciamis, West Java, for analysis and comparison with A. chinensis sequences from the same gene region. The results showed that the infected and non-infected sengon came from the same haplotype with a genetic distance of 0 and InDel diversity of 0,031. Meanwhile, from 380 parallel aligned sites, there were 27 different sites between F. moluccana and A. chinensis. The genetic distance of the two species was classified as very low at 0.017. The psbA-trnH intergenic spacer region sequences of sengon in this study were the first to be uploaded to GenBank and can be accessed with accession numbers of LC456638.1 to LC456701.1. ABSTRAKHutan tanaman sengon (Falcataria moluccana), khususnya di Pulau Jawa, pada umumya menghadapi serangan penyakit karat tumor yang disebabkan oleh patogen Uromycladium falcatariae, sehingga menimbulkan kerugian ekonomi yang cukup besar. Adanya spesies lain yang memiliki kemiripan morfologi dengan F. moluccana menimbulkan pertanyaan apakah sengon yang terserang dan tidak terserang karat tumor merupakan jenis yang sama. Penelitian ini bertujuan untuk mengonfirmasi jenis sengon yang terserang dan tidak terserang karat tumor dan membandingkan dengan spesies yang mirip secara morfologi, yaitu Albizia chinensis menggunakan penanda molekuler daerah psbA-trnH intergenic spacer pada DNA kloroplas. Sampel kayu basah dari 32 tanaman terserang dan 32 tanaman yang tidak terserang karat tumor diambil dari Bogor dan Ciamis, Jawa Barat, untuk dianalisis dan dibandingkan dengan sekuens A. chinensis dari wilayah gen yang sama. Hasil analisis menunjukkan bahwa sengon yang terserang dan tidak terserang berasal dari haplotipe yang sama dengan jarak genetik 0 dan keragaman InDel sebesar 0,031. Sementara itu, dari 380 situs yang sejajar, terdapat 27 situs yang berbeda antara F. moluccana dan A. chinensis. Jarak genetik kedua jenis tersebut tergolong sangat rendah yaitu 0,017. Sekuens daerah psbA-trnH intergenic spacer sengon dalam penelitian ini merupakan yang pertama diunggah di GenBank dan dapat diakses dengan nomer aksesi LC456638.1 sampai LC456701.1.

HUBUNGAN ANTARA STATUS NUTRISI DENGAN PRODUKSI BUAH DAN BENIH SURIAN ( (A. Juss.) M. Roem.) DI HUTAN RAKYAT Agus A. Pramono; Iskandar Z. Siregar; Endah R. Palupi; Cecep Kusmana
Jurnal Penelitian Hutan Tanaman Vol 12, No 3 (2015): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

Pohon-pohon pada lahan milik petani telah menjadi pemasok penting dalam peredaran benih tanaman hutan. Oleh karena itu, perlu difahami pengaruh dari perbedaan pengelolaan hutan pada lahan petani terhadap produksi benih. Penelitian ini bertujuan untuk mengetahui hubungan status nutrisi tanah dan daun pada berbagai pola agroforestri di hutan rakyat di Jawa Barat dan pengaruhnya terhadap produksi benih. Penelitian ini dilakukan pada delapan plot berbentuk bujur sangkar (50 x 50 m) dari beberapa pola tanam yang berbeda. Analisis konsentrasi hara tanah dan daun dilakukan pada tiga sampel dari setiap petak. Jumlah malai per pohon, bunga per malai, buah per malai, dan benih per buah dihitung pada 4 pohon dari masing-masing plot. Hasil penelitian menunjukkan bahwa konsentrasi unsur hara P, K, Mg, dan C pada daun bervariasi secara nyata di antara pola agroforestri. Konsentrasi N pada daun tidak berbeda nyata antar plot dan ketersediaannya bukan merupakan faktor pembatas untuk produksi benih. Konsentrasi Ca berpengaruh positif terhadap jumlah malai per pohon dan jumlah bunga per malai. Konsentrasi Mg berkorelasi positif terhadap jumlah bunga per malai. K berpengaruh negatif terhadap produksi buah, dan P berpengaruh negatif terhadap produksi benih. Produksi buah dan benih tertinggi diperoleh pada tegakan surian yang ditanam monokultur dengan tumpangsari tanaman semusim atau kebun campuran yang di tumpangsarikan dengan tanaman semusim.

KERAGAAN PERTUMBUHAN DAN KERAGAMAN GENETIK ACACIA MANGIUM WILLD. UMUR 7 TAHUN HASIL IRADIASI SINAR GAMMA (GENERASI M1) Growth Performance and Genetic Diversity of 7 Years Old Gamma Iradiated Acacia mangium Willd. (M1 Generations) Eka Perdanawati Yunus; Supriyanto .; Iskandar Z. Siregar; Soekisman Tjirosemito; Imam Mawardi
Jurnal Silvikultur Tropika Vol. 8 No. 2 (2017): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.8.2.88-95

Mutation breeding is a powerful tool to provide novel trait in plants. However their applications in forestry are still limited. Acacia mangium is a major commercial plantation species in Indonesia and other Southeast Asia countries. Therefore, we were trying to improve its productivity. In 2008, 1200 A. mangium seeds had been irradiated by gamma ray 137Cs. There were 98 trees of M1 generations of 7 years old plantations that survive. Most of them are sterile with high clear bole and natural pruning, small branch with good growth angle,and almost straight cylindrical stem form. Based on growth performance, there were at least 29 M1 superior trees. During the observations, unexpected diversity in the bark colours with high and positive correlation to growth performance were discovered. Using microsatellite markers, the use of irradiations techniques provide surplus of heterozygosity with high value of Shannon’s Information Index. Dendrogram showed that almost all of M1 generation formed separate cluster from M0 generation with 0.71 genetic distance .Key words: mutation breeding, Acacia mangium, microsatellite

ASOSIASI POHON DENGAN EPIFIT Hoya spp. DI TAMAN NASIONAL BUKIT DUABELAS Tree Association with Epiphytes Hoya spp. in Bukit Duabelas National Park Inggar Damayanti; Iskandar Z. Siregar; Sri Rahayu
Jurnal Silvikultur Tropika Vol. 8 No. 3 (2017): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.8.3.191-196

In the tropical rainforests of Jambi, Sumatera, a particular group of epiphytes, species in the genus Hoya, have significant potential to be developed as commercially valuable ornamental plants, because of the uniqueness and beauty of their flowers. Hoya spp. are epiphytic vines whose survival depends largely on the presence of carrier trees, i.e. phorophyte trees. The study reported here was conducted to identify the level of epiphytic association between phorophyte trees and identified Hoya species. The study found four Hoya species, namely: Hoya rintzii, Hoya revoluta, Hoya coronaria, and Hoya cf. caudata. The four species of Hoya were found growing on eleven different species of phorophyte trees. Based on the results of t-contingency tables it was found that there is no association between particular Hoya species and the particular phorophyte tree species. This conclusion was supported by the calculation of Jaccard association indices demonstrating that the association between Hoya spp. and phorophyte tree species is relatively weak. Crown cover and the diameter of the tree are two habitat variables that affect the presence of Hoya revoluta at the sites. The presence of Hoya caudata was influenced by the variable temperature, while the presence of Hoya coronaria was associated with humidity, but the degree of association was relatively weak. The most significant variables affecting the presence of Hoya rintzii were tree height and elevation.Key word: association, ephyphites, Hoya spp, phorophyte.

Co-Authors Agus A. Pramono Deden D. Matra Eka Perdanawati Yunus Endah R. Palupi Giyanto Giyanto Hasyyati Shabrina Imam Mawardi Inggar Damayanti Neo Endra Lelana Soekisman Tjirosemito Sri Rahayu Supriyanto . Suryo Wiyono Ulfah Juniarti Siregar

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