Judul: Arsitektur Perakaran Tiga Jenis Meranti dan Hubungannya dengan Karakteristik Pertumbuhan
Abstrak: Root is one of the important plant organ for supporting growth and development. The root functions include plant anchoring, water & nutrition absorption, and their distribution. Three species of Meranti were used in the research, namely Shorea stenoptera, Shorea palembanica, and Shorea leprosula. The aims of this research were i) to study the differences of root architecure formation on three species at HPGW ex-situ conservation area, ii) to study the relation of root architecture and phenotype (growth) characteristics of three species, including to determine Index of Root Anchoring (IRA) and Index of Root Binding (IRB). Root architecture was studied through root growth patterns, root morphology, and root growth variables.The results showed that i) the root growth patterns on three species were similar. That were classified into Champagnat group model with monopodial typical growth and tended to form orthotrophic branching. The root morphology was also similar, and the variance of root characteristic variables was not significant between species. ii) Total of root length significantly influenced height of plant and trunk volume, and the depth root significantly influenced height of plant and the crown diameter. The IRA values of S. stenoptera dan S. palembanica were categorized into medium group. The IRB value were categorized into low group. The IRA value of S. leprosula was categorized into high group, while and the IRB value was categorized into low group.
Keyword: Shorea, index of root anchoring, index of root binding, root architecture

Judul: Root Morphophysiology of Seedlings Planted in Nursery with Waterlogging and Shading using Peat Soil
Abstrak: Pemanfaatan lahan gambut saat ini masih memiliki berbagai hambatan, salah satunya adalah mendapatkan tanaman yang toleran pada kondisi lahan gambut yang khas, karakter tanah, dan adanya genangan yang dapat timbul sewaktu-waktu. Analisis morfo-fisiologi akar tanaman yang ditanam pada tanah gambut dengan perlakuan genangan dan naungan yang bervariasi akan memberikan gambaran mengenai respon tanaman pada kondisi di lahan gambut yang direstorasi. Penelitian ini bertujuan untuk menganalisis morfo-fisiologi akar dengan berbagai intensitas penggenangan dan naungan di tanah gambut. Jenis tanaman yang digunakan yaitu Durio zibethinus (durian), Nephelium lappaceum (rambutan), Shorea balangeran (balangeran), dan Cratoxylum arborescens (gerunggang) ditanam pada tanah gambut dan diberikan perlakuan genangan dan naungan dengan berbagai intensitas, selanjutnya dilakukan pengamatan morfo-fisiologi akar yang meliputi kerapatan pembuluh xilem (VD), jumlah sel pembuluh xilem, luas area xilem akar (Axilem), luas total lumen pembuluh xilem (Alumen), diameter ideal lumen pembuluh xilem akar (D), dan konduktivitas hidrolik potensial (Kp) pembuluh xilem akar. Hasil penelitian menunjukkan ada perbedaan morfologi akar antara S. balangeran dan C. arborescens. Perlakuan genangan dan naungan berinteraksi memengaruhi D dan Kp akar S. balangeran, sementara VD pada S. balangeran hanya dipengaruhi oleh genangan. Interaksi genangan dan naungan juga memengaruhi D akar C. arborescens., The utilization of peatlands nowadays is still hindered by many things, one of them is finding plants that can tolerate the extreme conditions caused by the unique peat soil characteristics, and waterlogging that may occur. Morphophysiological analysis of roots from four plant species that were planted in peat soil and treated with various levels of waterlogging and shading was expected to show how plants will respond to the condition of the rewetted peatlands. This study aimed to analyze morpho-physiology characteristics of roots from Durio zibethinus (durian), Nephelium lappaceum (rambutan), Shorea balangeran (red balau), and Cratoxylum arborescens (gerunggang) seedlings planted in peat soil treated with several intensities of waterlogging and shading. Roots of the plants were observed to find morpho-physiological differences in vessel density (VD), the amount of xylem lumen cell, area of xylem (Axylem), a total area of lumens (Alumen), ideal diameter of xylems lumen (D), and the potential hydraulic conductivity (Kp) of roots xylem. The result of this study showed that waterlogging influenced the root morphology of S. balangeran and C. arborescens. Waterlogging treatment affected VD of S. balangeran. The interaction of waterlogging and shading treatments affected D and Kp of S. balangeran but it only affected D of C. arborescens.
Keyword: Cratoxylum arborescens, Durio zibethinus, Hydraulic conductivity, Kerapatan pembuluh xilem, Konduktivitas hidrolik, Nephelium lappaceum, Shorea balangeran, Vessel density

Judul: Balantidiosis disentri dalam zoonosis
Abstrak: Balantiosis merupakan suatu penyakit pada manusia dan ababi yang disebabkan oleh Balantidium coli. Penyakit ini pertama kali diamati oleh Kalmsten pada tahun 1857 pada pasien yang mendrita diare, sedang balantidiosis pada babi pertama kali dilaporkan oleh Leukart pada tahun 1862. Parasit ini merupakan protozoa terbesar yang berada pada usus manusia dan babi dan salah satu Giliata yang patogen.
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