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Luthfi A Mahmud Siregar
Universitas Sumatera Utara

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PERTUMBUHAN EKSPLAN PUAR TENANGAU (Elettariopsis sp.) SECARA IN VITRO Triningsih, Triningsih; Siregar, Luthfi A Mahmud; Putri, Lollie A. P. Putri Agustina P
AGROEKOTEKNOLOGI Vol 1, No 2
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Puar tenangau is a herbal plant of Zingeberaceae that from Thailand. The Plant has a big potential as pharmacy and traditional medicines, but the spread of this plant was unknown well in Indonesia even so needed a conservation for this plant. In vitro conservation is a one of alternative. In in vitro method, adding plant growth regulator is needed like Auxine and cytokinine.  Napthtalen-3-Acetid is kind of auxine that good to root growth and Benzil amino purin is kind of cytokinin to shoot growth. The research aimed to know the influence of Benzylamino purine (BAP) and Napthtalen-3-acetid acid (NAA) concentration on the growth of puar tenangau.The research was carried out in the Tissue Culture Laboratory, Agriculture’s Faculty of Nort Sumatera University from March to June 2012. This research used Completely Randomized Design with two factors. First factor was BAP concentration consist of four levels:0 mg/l; 2 mg/l; 4 mg/l; 6 mg/l. The second factor was NAA concentration consist of three levels are 0 mg/l; 1.5 mg/l; 3 mg/l. The results showed that BAP concentration give effect significantly only on leaves number in 12 weeks after planting, but it have no effect significantly on the percent of living explant, plantlet height, leaves number on 4 and 8 weeks after planting. NAA and interaction of BAP and NAA have no effect significantly to living explant, plantlet height, leaves number on 4,8 and 12 weeks after planting.   Keywords: puar tenangau, BAP,NAA, In vitro.
RESPON MEDIA TANAM DAN PEMBERIAN AUKSIN ASAM ASETAT NAFTALEN PADA PEMBIBITAN AREN (Arenga pinnata Merr) Utri Patma1, Utri Patma1; Lollie Agustina P. Putri, Lollie Agustina P. Putri Lollie Agustina P. Putri; Siregar, Luthfi A Mahmud
AGROEKOTEKNOLOGI Vol 1, No 2
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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ABSTRACT Growth of plant is affected by some factors; among other things are plant media and auxin application. A research had been conducted at Pasar II Setiabudi, Kelurahan Tanjung Sari, Medan (± 25 m asl) in March – August  2012. The objective of the research was to know response of  plant  media and auxin naphtalene acetic acid application on the growth of sugar palm seed. The research that use Randomized Block Design with two factor that plant media of (top soil + sand + compost), (top soil + husk charcoal + compost), (top soil + sand + husk charcoal + compost) and auxin application were of 0 ppm, 50 ppm, 100 ppm and 150 ppm. The parameters observed were increase seed height, leaf sum, leaf klorofil and steam diameter. The result of research showed that the response plant media and auxin naphtalene acetic acid application on sugar palm nursery with interaction between plant media and auxsin application were not significantly to all the parameters observed.   Keywords : plant media, auxsin application, sugar palm
SELEKSI GALUR KEDELAI (Glycine max (L.) Aminah, Siti; Rosmayati, Rosmayati; Siregar, Luthfi A Mahmud
AGROEKOTEKNOLOGI Vol 1, No 3 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Strain Selection of Soybean ( Glycine max (L) Merril) of F3 Generation on Saline Soil. Salinity isone of the most serious and widespread agricultural problems resulting in losses of yield. Generally,as land is more intensively cultivated, the salinity problem becomes more severe. A highconcentration of NaCl greatly reduces growth of both the shoot and the root. One strategy availableto cope with saline soil is to choose salt-tolerance crops or to select salt-tolerance cultivars within acrop. This research aims to select the soybean that can grow and has a higher production on salinesoil of F3 generation. This research was conducted in the experiment area at Desa Tanjung Rejo,subdistrict of Percut Sei Tuan, Regenecy of Deli Serdang in the elevation of 1.5 m on above sealevel since Apryl 2012 up to Juny 2012. The experiment design applied in this research is a crosssection analysis that consist of 1 variety, and the applied methot is a F3 generation pedigreeselection, the population is sample, the number of live plant is 137 of 2118. The selected plant isbased on the grain production per plant for 39 plants. Based on the results of research indicates thatbased on the highest weight of seed per plant is 4.9 g on the plant number 1305.2.20 and the lowestproduction is 0.2 g on the plant number 88.5.10 and 88.5.11. The component of production that hasa direct influence to the grain production per plant is the number of branch, age of flowering,number of pod and number of pods contain. Component of production that giving the highest directinfluence is the number of pod contain for 0.832.Keywords : species, soybean, selection, saline soil.