Fusarium wilt is the most destructive disease on banana. One of control measures that can be performed to control this disease is by increasing plant immunity. The aim of this study was to find out the disease resistance profile of banana to fusarium wilt through resistance induction with Salicylic acid. This study was performed at Plant Pest and Disease Laboratory, Indonesian Tropical Fruit Research Institute, started from May to December 2018. Banana cultivars used in this study were cv. Barangan and Raja Kinalun at pre-planting stage. The treatments were the induction methods consisted of control (sterile water), Salicylic acid spraying to entire part of plant and the root soaking with 5 mM Salicylic acid solution. The plants were artificially inoculated with F. oxysporum f.sp cubense VCG 01213/16 (TR4). Each treatment was repeated 3 times with 10 plants for each treatment unit. The result showed that. banana cv. Barangan inoculated with Foc (control) was highly susceptible while cv. Raja Kinalun in the same treatment had moderate resistant criterion. Salicylic acid can induce resistance to fusarium wilt disease on cv Barangan with moderate resistant criterion compared to highly susceptible on its positive control.
Durian is a tropic fruit having numerous variations on its fruits. Its variations are not only in its shape but also in its aril fruit, aril color, flavor, and aril thickness. In addition to its fruit variations, the genus Durio also has many species which quite hard to distinguish morphologically, except during flowering and fruiting times. This study aimed to determine the genetic relationship among Durian, Pelangi Atuturi Variety Durian, Durio graveolent, and Durio zibetinus based on chloroplast genes (RbcL and matK genes). The primers were previously designed for amplifying matK and rbcL genes based on the Durio zibethinus sequence. Both genes were used because of having great competence to describe genetic relationships between plant species. The rbcL primer could amplify all evaluated samples. Meanwhile, matK primer generated a smeared band in Durian Pelangi; thus, we did not obtain any sequence of this plant. Sequence analysis showed no variation of rbcL sequence in these evaluated species. A similar result was also observed on D. zibethinus and D. graveolent. Overall, both genes could not describe the genetic relationship among the evaluated durians, and they were grouped in the same cluster in phylogenetic.
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