Physiological and biochemical characteristics of nine different tomato cultivars were studied in order to select the cultivar of overall best quality. The tomato cultivars (Lalima, Manik, Summer, Deshy, Anupama, Jhumka, Chaity, Bizly and Lovely) were collected from different places of Rajshahi region. Those cultivars showed variability in physiological and biochemical characteristics. The range for the tomato quality parameters are as follows: fruit weight (44.76-111.70g), juice (81.25-69.94%), dry matter (7.58-9.92%), moisture content (90.08-92.42%), ash (0.438-0.530%), acidity (0.083-0.129% as citric acid), β-carotene (298-380µg/100g), vitamin C (6.98-11.43 mg/100g ), total sugar (3.45-4.52%), reducing sugar (1.21-1.56%), non reducing sugar (2.24-2.97%), protein (0.525-0.654%), iron (0.152-0.215 mg/100g), phosphorous (21.94-28.31 mg/100g), calcium (38.15-42.31 mg/100g), carbohydrate (4.18-6.24%), starch (0.16-0.21%), and so on. Bizli tomato cultivar has the best overall qualities with respect to fruit colour, fruit size, fruit pulp taste. These data of quality characteristics of tomato provide important information for consumers, producers and industrial processor for plantation and processing industry.

Increasing in the earth’s surface temperature due to global warming threatens the survival of plants in the sub-tropics and in the tropics areas. Looking for plant varieties that can adapt to the threat of global warming impacts is very important at this time. The availability of effective and efficient selection methods are needed to get it. This study aimed to develop an in vitro selection method for resistance to high temperature stress in two tropical plants: Pruacan (Pimpinella pruatjan Molk.) and Cacao (Theobroma cacao L.). The in vitro selection methods were developed by testing the embryogenic culture of pruacan and cacao somatic embryos development under various temperature incubations. The two plants showed a different level of tolerance to high-temperature stress. Temperatures of 35 °C for two months did not cause the death of cacao somatic embryos, but the temperature of 32 °C for 2 and 3 months had caused the death of pruacan somatic embryos by 80 and 90%, respectively. The 100% death of cacao somatic embryos occurred at 40 °C and 45 °C on days 16 and 5 of incubation, respectively. The in vitro selection for high-temperature stress in pruacan and cacao plants were at 32 °C and between 40-45 °C respectively. Developing in vitro selection methods in plant species is needed to face the challenges of climate change in the future.

Pemberian pelepah daun kelapa sawit fermentasi dalam pakan memberi nilai ekonomis danmeningkatkan keuntungan penggemukan sapi bali jantan lepas sapih. Penelitian ini dilaksanakan di Dusun 1(Sembat) Nagori Marihat Baris Kecamatan Dolok Marlawan Kabupaten Simalungun. Penelitian ini telahdilaksanakan selama tiga bulan yang dimulai pada bulan Januari 2013 sampai Mei 2013. Penelitian inimenggunakan 12 ekor sapi bali jantan dengan rancangan acak kelompok, terdiri atas 4 kelompok yangdibedakan berdasarkan bobot badan sapi (R1 = 102,33 kg ± 9,29; R2 = 121,00 kg ± 6,56; R3 = 140,67 kg ±5,03; dan R4 = 162,67 kg ± 7,51). Ada tiga perlakuan yaitu P0 (ransum dengan 25% pelepah daun kelapa sawitsegar), P1 (ransum dengan 20% pelepah daun kelapa sawit fermentasi) dan P2 (ransum dengan 30% pelepahdaun kelapa sawit fermentasi). Hasil penelitian menunjukkan bahwa Pemanfaatan Pelepah Daun Kelapa Sawityang difermentasi Aspergillus niger terhadap Performans Sapi Bali Jantan terhadap konsumsi pakan(kg/ekor/hari) 5,62; 5,94; dan 5,64. Rataan pertambahan bobot badan (g/ekor/hari) 0,46; 0,65 dan 0,53. Konversipakan 12,19; 9,46 dan 10,25. Uji statistik menunjukkan bahwa pelepah daun kelapa sawit fermentasi berbedanyata (P<0.05) terhadap konsumsi pakan, pertambahan bobot badan dan menurunkan konversi pakan sapi balijantan. Kesimpulan hasil penelitian ini menunjukkan bahwa fermentasi pelepah daun kelapa sawit denganmenggunakan Asprgillus niger dapat meningkatkan konsumsi dan pertambahan bobot badan serta menurunkankonversi pakan sapi bali dibandingkan dengan pelepah kelapa sawit segar.