A total of 70 bacteria were isolated from the rhizosphere of potato cv. Hartapel that grew at an altitude of 700 m above sea level on the island of Buru-Maluku. Of these isolates, 36 isolates were capable of producing IAA, GA, Siderophore and phosphate solubilization. Among the selective isolates, isolate HB8 produced the highest amount of IAA (5.816 mg l -1 ), while isolate HB32 produced the highest amount of GA (6.879 mg l -1 ). Isolate HB18 had the best ability in producing salicylate type siderophore (4.214 mg l -1 ) and isolate HB3 showed the highest phosphate solubilization (14.237 mg l -1 ). There were three isolates (HB3, HB8 and HB31) positively produced HCN. All 36 isolate showed physiological characters which revealed the potential use for biostimulant, biofertilizer and bioprotectant against soil borne pathogens.

A B S T R A C T Pigmented Rice (PR) is one of the valuable food crops used in indigenous medicine.Thirteen PR varieties were collected from 3 climatic zones of South Sulawesi, Indonesia and analyzed for grain dimension, color and proximate composition. The PR were extracted using acidic ethanol and then measured their total phenolics, anthocyanins and 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity. Grain size determination showed that the length of the rice was in the range of 5.60-6.82. There was no significant different (p>0.05) in rice length and length/width ratio. The colorimetric results indicated that the darkest black glutinous rice had the lowest brightness parameter L* value which was negatively correlated with its total anthocyanin (r = -0.673) and phenolic (r = -0.559) contents. Proximate analysis results showed that all of PR varieties fulfilled the water content limit (#14%). The total contents of ash, fat, protein, crude fiber and carbohydrate were in the range of 1. 19-2.13, 1.06-3.05, 7.24-14.02, 0.66-0.99 and 71.29-77.14%, respectively. The anthocyanin and phenolic contents of black glutinous rice extracts were in the range of 94.70-202.46 mg Cy-3-glc/100 g db and 292.74-746.25 mg GAE/100 g db, respectively, which were higher than the black rice (66.08-113.83 mg Cy-3-glc/100 g db and 119.74-230.10 mg GAE /100 g db) and the red rice (0-12.85 mg Cy-3-glc/100 g db and 12.52-64.52 mg GAE/100 g db). Antioxidant activity was positively correlated with total phenolic (r = 0.886) and anthocyanin (r = 0.650) compounds. The data suggests the potency of black glutinous rice as a part of nutraceutical product formulation.

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Intercropping is a breakthrough in land use optimization. This study aim is to determine the effect of the number of rows and soybean varieties on the growth and yield of soybean in intercropping with corn. This study was set in a split plot design with three replication. The main plot was soybean varieties: Dena-1 (V1), Detap-1 (V2) and Deja-1 (V3), while subplots were the number of rows of soybean planting lines: Monoculture (B0), 3 rows of soybean-3 rows of corn (B1), 4 rows of soybean-3 rows of corn (B2), and 6 rows of soybean-3 rows of corn (B3). The results show that V1 has the lowest plant height as 83.04 cm. The highest number of filled pods is achieved at V2B0 with 78.53 pods but not significantly different with V2B3 as 71.77 pods. B3 gave the lowest plant height 82.74 cm, weight of 100 seeds 15.93 g, and yield weight of 1.13 t ha−1. The lowest populations of Nezara viridula and Bemisia tabaci was produced in V2B3. The highest land equivalent ratio (LER) is achieved in V3B3 1.45. This present study shows that implementing Detap-1 with 6 rows of soybean is better than other treatment in the intercropping with corn.

The nickel (Ni) content in a post-mining soil of Pomalaa mines reached 14,200 mg.kg-1 and became a limiting factor in the plant growth process. A Ni reduction in the soil by using phyto-accumulator such as Jack bean (Canavalia ensiformis L.) can be improved by combining it with arbuscular mycorrhizal (AM) fungi. The purpose of this study was to determine the effect of the mycorrhizal fungus Acaulospora sp. on the efficiency of Ni reduction by C. ensiformis. This experiment was carried out by using a randomized block design with three different treatments, include: 1) C. ensiformis without Acaulospora sp. inoculation (negative control), 2) C. ensiformis inoculated with indigenous Acaulospora sp. and 3) C. ensiformis inoculated with non-indigenous Acaulospora sp. The study was conducted in the nursery that belongs to PT. Vale Indonesia Tbk., Sorowako, South Sulawesi, Indonesia. The results showed that highest nickel accumulation was found in the root inoculated with indigenous Acaulospora sp. (9500 mg.kg-1), followed by stem (1400 mg.kg-1), leaf and pod (1300 mg.kg-1), seed (1200 mg.kg-1), and flower (1100 mg.kg-1). This study indicates that application of the indigenous Acaulospora sp. can improve C. ensiformis efficiency to reduce Ni content at Sorowako post-mining area.