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The objective of the research is to identify the growth response of binahong accessions from lowland and highland as affected by technological packet. This study used a factorial RBD with two treatments. Factor I: Plant accession named A1 from lowland medan johor; A2 from highland barus jahe karo; A3 from lowland medan sunggal. Factor II: binahong cultivation technology package, named P1: planting medium top soil: compost: manure (3: 1: 1); 25% shade; natural GR bamboo shoot extract 40%; liquid organic fertilizer 10 ml / l; P2: top soil: compost: manure (2: 1: 1); 25% shade; bamboo shoots extract 40%; liquid organic fertilizer 20 ml / l; P3: top soil: compost: manure (3: 1: 1); 25% shade; bamboo shoots extract 60%; liquid organic fertilizer 10 ml / l; and P4: top soil: compost: manure (2: 1: 1); 25% shade; bamboo shoots extract 60%; liquid organic fertilizer 20 ml / l. The results showed on 7, 8 and 9 WAP, the accession of binahong significantly affected plant length and number of leaves. The application of technological packet unsignificantly affected plant length of binahong at 7 to 11 WAP. Shoot-root ratio among the treatments was not significant.

Analysis of the physiological characteristics of plants is important because the analysis includes various observations, calculations, as well as the varying relationships between plant growth and development processes and their results. The purpose of this study was to analyse the physiological characters of two shallot varieties at various watering frequencies. The research design used was a randomized block design with 2 factors, namely shallot varieties (Medan and Bima Brebes) and the frequency of watering (intervals of 1 once a day, once every 3 days, once every 5 days and every 7 days) located in the Greenhouse and Tissue Culture Laboratory of the Faculty of Agriculture, Universitas Sumatera Utara in May - September 2019. The results indicated that the Bima Brebes variety produced the highest total chlorophyll, which was significantly different from the Medan variety. The leaves relative water content was not significantly different in the two shallot varieties tested by watering frequency treatment. Watering once in 5 days produced the lowest hydrogen peroxide but produced the highest ascorbate peroxidase enzyme. The activity of the ascorbate peroxidase enzyme was significantly different and had the highest value in the Medan variety, watered with a frequency of once in 5 days.

The application of natural plant growth regulators (PGR) influences the growth of binahong (Anredera cordifolia (Ten.) Steenis). The objective of the current research is to evaluate the growth component of lowland binahong accessions due to the application of natural PGR of coconut water and banana hump extract. The research used factorial randomized block design with 2 factors and 3 replications. The first factor was different accessions of binahong from lowlands (Marelan; Ampera Tmur; Helvetia) in the city of Medan, North Sumatera, Indonesia. The second factor was natural PGR, in which we conducted experiments without the application of PGR; 40% coconut water application, banana hump extract 40%; coconut water 40% + banana hump extract 40%. The results showed that the accessions from Ampera Timur had root dry weight that were higher than the other accessions. The treatment of 40% coconut water + banana hump extract 40% increased plant length, and root dry-weight. Interaction of Ampera Timur binahong accession and 40% coconut water + banana hump extract 40% increased shoot dry-weight and root dry-weight.

The chlorophyll content and stomatal density in a plant vary greatly determined by plant genetic factors and plant growth environment. The research was aimed for evaluating and determining the chlorophyll content and stomata density of Medan’s local binahong accessions which are lowlands. The research was conducted by survey method, by taking samples of local Medan binahong leaves, then analysed in a laboratory. Based on survey results, 8 accessions of Medan local binahongs have been obtained. The result of the research indicated that the accession of Medan 2 has the highest total chlorophyll content and stomatal density compared to other accessions. The highest of cuticle thickness was found in Medan 7 accession, while the lowest was in Medan 4 accession.

Water shortage is an environmental stress that affects the growth, quantity and quality of sweet potato production. The study objective was to analyse the effect of drought stress on the quantity and quality of orange-fleshed sweet potato. Field research has been carried out in April to July 2019 in the greenhouse. This research used a randomized block design with two factors, the first factor was sweet potato cultivars (Beta-1 variety, Perbaungan cultivar, Cengkeh Turi cultivar and Tanah Seribu cultivar) and the second factor was drought stress with different watering level namely severe drought (watered until 1 month and until 2 months with 10 days interval, respectively) and control (watered until 4 months with 10 days interval). The results showed that the orange-fleshed sweet potato cultivars produced significantly different average tuber weights, the number of tubers, beta carotene content, starch content and tuber moisture content were not significantly different. Drought stress influences the yield and quality of tubers which causes a very significant decrease in the parameters of number of tuber, tuber weight, beta carotene content, starch content and tuber water content. The higher the level of drought will cause a decrease in the quantity and quality of sweet potato production.