Judul: Pembentukan Tanaman Haploid Ganda dengan Perlakuan Oryzalin Secara In Vitro pada Biji Jagung (Zea mays) Diduga Haploid
Abstrak: BC2 maize purple kernels estimated haploid were resulted from a cross between Bisma variety with haploid inducer line (3490) by backcross. Chromosome doubling to these kernels was done to produce doubled haploid plants (pure lines). This study was conducted to get an in vitro diploidisation method by oryzalin treatment as a chromosome doubling agent, with concentration of 0, 5, 10, and 15 mM for 24 hours on seeds and root of seedlings. Chromosome analysis on the control of purple kernels showed 66.7% of the seeds was haploid and 33.3% was diploid. Oryzalin treatment affected in doubling the chromosome number from haploid to doubled haploid or from diploid to tetraploid. The higher concentration of oryzalin increased the opportunity of chromosome doubling, but increased death rate. Combination of treatment that is most efficient was 5 mM oryzalin on seedling roots that produced the highest number of doubled haploid plants was found by 71.4% with a low mortality rate by 30%. Increasing of the chromosome number caused the growth of the longer canopy length and more number of leaves and the lower stomata density.
Keyword: 

Judul: Analisis Jumlah Kromosom Biji Ungu Hasil Persilangan Jagung Varietas Pulut dengan BC2 Putatif Penginduksi Haploid dan Hasil Perlakuan Kolkisin
Abstrak: Bulbosum method is very potential to produce haploid plant of maize. The development of Bulbosum method in Indonesia was done until initial step, that is cross between local variety with haploid inducer line. This research was conducted to analyze the chromosome number of purple seed from a cross between Pulut and BC2 putative haploid inducer and from in vitro colchicine treatment. The chromosome number of these purple seed were found not haploid (x=10) but diploid (2n=2x=20). The effect of colchicine with different concentrations and durations of treatment to ploidy level was not be able to be observed, because death happened at almost all of the seeds and seedlings treated. Chromosome doubling was found at treatment of seedling root by colchicine concentration of 0.06% for 6 hours, that is became tetraploid (2n=4x=40), but the plant could not survive until planting in greenhouse. The only plant survived after colchicine treatment until planting in greenhouse was still diploid with morphological and anatomical characters which were not different from control plants.
Keyword: 

Judul: Perilaku Pelaku Wisata di Sembalun terhadap Bahaya dan Bencana di Taman Nasional Gunung Rinjani
Abstrak: Gunung Rinjani adalah gunung api tertinggi kedua yang memiliki kaldera, kawah, danau, mata air panas, savana, dan keindahan lainnya serta menjadi salah satu destinasi utama di Lombok yang dikunjungi oleh wisatawan domestik maupun internasional. Di balik keindahannya, kawasan Gunung Rinjani berada pada kawasan bahaya alam (ntural hazards) baik bencana hidrometeorologi maupun geologi sehingga menjadi wilayah rawan bencana. Mengingat pentingnya peran pelaku wisata terhadap keberlangsungan kegiatan wisata yang aman, maka diperlukan kesadaran akan wilayah rawan bencana. Kesadaran ini terbentuk melalui persepsi, sikap kewaspadaan, dan perilaku kesiapsiagaan. Penelitian ini bertujuan untuk mengidentifikai persepsi, sikap, dan perilaku pelaku wisata terhadap bahaya dan bencana. Metode yang digunakan dalam penelitian ini adalah wawancara, observasi lapang, dan studi pustaka. Persepsi pelaku wisata terhadap bahaya secara umum tergolong dalam kategori sedang, hal ini ditunjukan dengan pelaku wisata sudah mengetahui keberadaan bahaya akan tetapi kurang menyadari risikonya. Persepsi terhadap bencana secara umum tergolong dalam kategori baik yaitu pelaku wisata sudah mengetahui potensi bencana dan menyadari risikonya. Sikap pelaku wisata terhadap bahaya secara umum tergolong dalam kategori sedang karena pelaku wisata kurang mewaspadai bahaya. Sikap terhadap bencana tergolong dalam kategori baik untuk instansi karena sudah mewaspadai bencana sedangkan untuk masyarakat pelaku wisata tergolong dalam kategori sedang karena masih kurang mewaspadai bencana. Terdapat faktor yang menyebabkan ketidak selarasan antara persepsi, sikap, dengan perilaku yaitu pengalaman dan pekerjaan.
Keyword: bahaya, bencana, pelaku wisata, perilaku