PERKECAMBAHAN 4 AKSESI JEWAWUT (Setaria italica (L.) P. Beauv) PADA KONDISI CEKAMAN KEKERINGAN ARTIFISIAL

Abstract

Developing of jewawut cultivation as an alternative source of carbohydrates is one of the efforts to prevent food insecurity. Drought conditions and the availability of drought-tolerant seeds became one of the problems in the development of jewawut cultivation. The purpose of these experiments were to evaluate jewawut response to drought stress simulations at germination phases and to obtain accessions tolerant to drought stress. Drought stress is performed indirectly (PEG 6000 selective media). The research was done in Laboratory of Physiology of Faculty of Mathematic and Science, UNJ from February until July 2017. The experiments were done with a completely randomized design. Parameters of germination were analyzed with Anova test and continued by Duncan Multiple Range Test (DMRT). Lethal doses of PEG reducing 50% of germination (LD50) were 23,25%, with the quadratic equation y = 1,12-2,72x. The results base on germination phase, Buru merah as drought tolerance accessions, Polman merah and Polman kuning as medium tolerance accession, and Buru kuning as susceptible accessions.

Yield quality of Setaria italica accessions originated from Numfor Island, Papua, Indonesia

“…In this study, the highest yield of SM3 accession (2.023 tons ha -1 ) was still lower than that of Norman et al (1995) because the sole fertilizer used was organic fertilizer (chicken coop) at a dose of 20 tons ha -1 . Fertilization and environmental stress factors have been proven to cause a decrease in yield, which can be prevented by cultivating high-yielding S. italica (Mapikasari et al 2017;Ning et al 2015).…”

Efektivitas Pertumbuhan dan Hasil Tanam Beberapa Kultivar Kedelai (Glycine max (L) Merr.) dengan Pemberian Polietilena Glikol (PEG) Untuk Simulasi Cekaman Kekeringan

“…Hal ini menunjukkan pemberian PEG 6000 pada konsentrasi 5-20% secara in vitro mengakibatkan potensial osmotik terhambat dengan kondisi tanah pada kapasitas lapang tanaman kedelai (Zuyasna et al, 2016). Hasil penelitian lain oleh Mapikasari et al (2017), PEG 6000 pada konsentrasi 15% dapat digunakan untuk toleransi berkecambah jewawut (Setaria italica) terhadap cekaman kekeringan, sedangkan PEG 8000 pada konsentrasi 20% menggunakan media kapas menunjukkan presentase perkecambahan dan laju perkecambahan sangat rendah dibandingkan konsentrasi 10%. Semakin tinggi konsentrasi PEG dalam media maka membuat tanaman rentan terhadap cekaman air serta menyebabkan gagal berkecambah bahkan menyebabkan kematian pada benih.…”