Respon Pertumbuhan Tiga Varietas Cabai Rawit (Capsicum Frutescens L.) pada Beberapa Tingkat Salinitas

Abstract

The research to observe growth responses of three varieties of chili peppers (Capsicum frutescens L.) to salinity treatment was conducted at The Plant Physiology Laboratory of Faculty Mathematics and Science, University of Sumatera Utara, Medan. Experiment was arranged in a Complete Randomized Factorial Design of six treatments of salinity (0, 2000, 4000, 6000, 8000, and 10000 ppm of NaCl) and three variety of chili peppers (Local, Genie and Bhaskara). The result showed that interaction between salinity and varieties of chili peppers affect diameter of stem, diameter of root, leaf thickness, density of adaxial and abaxial stomata, and content of chlorophyl a significantly, but does not affect plant height, shoot dry weight, root dry weight, root-shoot ratio, content of chlorophyl b, and content of total chlorophyl significantly. All of variety show responses to decrease plant height, diameter of stem, diameter of root, shoot dry weight, root dry weight, root-shoot ratio, density of adaxial and abaxial stomata but leaf thickness increase as well as increasing of NaCl until 10000 ppm. Genie is the variety with the lowest decrease plant height, diameter of stem, shoot dry weight, root dry weight, and density of adaxial stomata compared with Local and Bhaskara for every increase of salinity.