Perkecambahan Biji Dan Pertumbuhan Kecambah Varietas Sorgum (Sorghum bicolor L.) Pada Cekaman Krom Heksavalen

Abstract

In contrast to other toxic trace metals, Cr has received little attention. Since valence level of chromium determines its toxicity, chromium is categorized as unique heavy metal. Chromium hexavalent (Cr6+) has the biggest toxicity among other valence levels. Seed germination and seedling growth are sensitive to heavy metal stresses. This research aimed to find out the responses of seed germination and seedling growth of 12 sorghum varieties toward Cr6+. Seed germination and seedling growth experiment was done on 12 sorghum varieties (Badik, UPCA-1, Keris, Keris M3, hegari Genjah, Gambela, Selayer, Sangkur, Mandau, Batari, Kawali, dan Numbu), planted in petridishes with Cr6+ treatment in form of chromate (K2CrO4) and dichromate (K2Cr2O7) compounds with 0, 50 and 500 mg of Cr/l concentration for a week. The parameters measured were the number of seeds germinate each day; the length of radicle and plumule, and fresh and dry weight at the end of experiment. The results showed that higher concentration of Cr6+ both in form of dichromate and chromate, significantly decreased the length of radicle and plumule, fresh and dry weight, and SVI (seedling vigor index) value. However, index germination (GI) value and percentage of germination of the 12 varieties sorgum significantly increased in the treatment of 50 mg Cr/l Cr6+ in form of dichromate and chromate. The treatment of dichromate compound showed bigger effect than chromate toward variables of seed germination and seedling growth of sorghum. It was noticed that 12 sorghum varieties possessed an integrated complex of adaptation to cope with the range of form of compound and concentration of Cr6+. Based on the responses of seed germination and seedling growth, Kawali, Hegari, Keris, Keris M3, Mandau, and Selayer varieties was more susceptible toward Cr6+ toxicity, and Sangkur, Selayer, Batari, and Numbu was more tolerant than other varieties. Keywords : chromate, dichromate, Sorghum bicolor, seedling, hexavalent chromium

Pengaruh Ukuran Biji, Suhu, dan Lama Perendaman Terhadap Perkecambahan Biji Kacang Merah (Phaseolus Vulgaris)

“…Media tanam yang digunakan adalah campuran tanah dan abu sekam padi dengan perbandingan (2:2) (Riadi 2010). Data yang dikumpulkan adalah persentase perkecambahan dan indeks perkecambahan (Kasmiyati et al 2015), daya berkecambah (Sandi et al 2014) dan jumlah daun kecambah (Hutasoit et al, 2017). Data yang dikumpulkan selanjutnya dianalisis menggunakan uji ANOVA pada program SPSS 26.…”

Analisis Upaya Pematahan Dormansi Biji Andaliman (Zanthoxylum acanthopodium DC.) dengan Pelukaan dan Perendaman Air Kelapa

“…Biji dikatakan berkecambah bila radikula telah tumbuh memanjang sebesar ± 2 mm. Parameternya yaitu persentase perkecambahan, indeks vigor, dan waktu biji berkecambah (Kasmiyati et al 2015)…”

Resistance selection of local sorghum varieties in East Nusa Tenggara, Indonesia against Rhizoctonia solani

“…Criteria for seed germination is when the coleoptile and radicle have grown ± 2 mm long. If these two structures have grown to the specified length, the seeds classified have been germinated (Kasmiyati et al 2015;Guragain et al 2023). Seed germination observations were carried out immediately after the sorghum seeds and R. solani were incubated for 4 days or on the first day the sorghum sprouts were removed from the R. solani pathogen.…”