Judul: Karakter Vegetatif dan Fisiologi Gandum Introduksi Sensitif Suhu Tinggi di Dataran Sedang dan Tinggi
Abstrak: One of the effort to reduce our dependency to wheat import is by developing tropical wheat adapted to mid altitude. However, high temperature in this area can be a limiting factor for wheat growth and production. Application of putrescine to plants may alleviate the negative effect of high temperature stress. The objective of the research was to study the characters responses of introduction high temperature sensitive wheat to putrescine application grown at mid and high altitudes. The material plant used is introduction high temperature sensitive wheat Munal, S-03, and Dewata. The observed characters were plant height, number of tillers, flag leaf area, leaf thickness, flag leaf angle, stomatal density, relative transpiration rate, and cholorophyll content. The result showed that the genotypes affected almost all growth characters, while putrescine application only affected to stomatal density and relative transpiration rate of wheat grown in Cisarua with the best putrescine consentration of 1.25 mM. High temperature sensitive wheat grew better in high altitude (Cipanas) than that of in mid altitude (Cisarua). The genotype S-03 was more suitable to be grown in both altitudes.
Keyword: wheat, vegetative and physiological characters, putrescine, heat stress

Judul: Karakter Morfologi dan Fisiologi Genotipe Gandum (Triticum aestivum L.) Introduksi Toleran Suhu Tinggi di Dataran Tinggi dan Sedang
Abstrak: Wheat (Triticum aestivum) is a member of Gramineae family originated from subtropical regions, that is consumed as a second food in Indonesia, but most of it are imported. Efforts to save foreign exchange from import of wheat is to develop wheat in Indonesia. Planting wheat in Indonesia is facing high temperature stress. Application of putrescine is expected to induce high temperature stress tolerance. This research aimed to study the morphological and physiological respons of two introducted wheat genotypes (Sbr and Astreb) that are tolerant to high temperatures under putrescine application. Wheat was planted in two locations: Cipanas (1100 m asl) and Cisarua (600 m asl) and then was observed the morphological (plant height, number of tillers, number of stomata; angles, thickness and flag leaf area) and physiological characters (chlorophyll content and transpiration rate) to evaluate the effect of 0, 1.25 and 2.5 mM putrescine application. Putrescine treatment in plants significantly affected on the content of chlorophyll a, b and total chlorophyll after 2nd period of putrescine application consentration 2.5 mM in Cipanas. Genotypic differences only affected on adaxial stomatal density after putrescine application in Cipanas, and adaxial stomatal density after 1st period of putrescine application in Cisarua. Genotype Sbr showed better growth in both locations compared with genotype Astreb at high temperature area.
Keyword: Bogor Agricultural University (IPB), Triticum aestivum, putrescine, physiology, morphology

Judul: Konstruksi aritmetika kurva eliptik F(2m) supersingular dan non-supersingular untuk skema kunci publik ElGamal
Abstrak: Algoritme ElGamal adalah salah satu algoritme kunci publik dengan aritmetik modular p yang mempunyai struktur grip siklik Z(p). Tingkat keanaman algoritme ini terletak pada pemecahan masalah logaritme diskret dari Z(p). Akan tetapi, tingkat keamanan tadi tahun ke tahun semakin menurun yang disebabkan kemampuan pemecahan algoritme diskret semakin meningkat. Untuk memenuhi tingkat keamanan yang memadai dibutuhkan p yang cukup besar yang menyebabkan proses enkripsi dan dekripsi menjadi lambat.
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