Respon Fisiologi pada Pembibitan Mangga Kasturi (Mangifera casturi Kosterm) terhadap Aplikasi Cahaya LED (Light Emitting Diode)
Kasturi mango (Mangifera casturi Kosterm) is one of the endemic fruit trees from South Kalimantan, with extinct status in the wild by IUCN. Kasturi had a problem with a long period in the nursery due to juvenility. Artificial light such as LED lamps can cut the juvenile phase because it could increase photosynthetic efficiency. This research aimed to determine different responses of physiology seedling using an LED lamp. This research used nested design as the experimental design where Monochromatic LED as the main factor with three levels (red, white, and blue) and accessions as the second factor with three levels (Cuban, Pelipisan and Kasturi) that were nested on the main factor. LED light made different responses for chlorophyll content that red LED made the higher concentration of chlorophyll a, but not for chlorophyll b and the ratio. Blue LED made plants have higher light absorbance, stomata conductance, transpiration, CO2 interception, and photosynthetic rate in Kasturi accession higher than the other lamps. Blue light made glucose concentration on leaf higher, but fructose higher under white lamp than the other lamps. The application of white LED made leaf thicker than the other lamps. Based on this research, different LED light illumination made a different response on Kasturi seedling for cut juvenile phase.
Keyword: photosynthetic, chlorophyll ratio, fructose, glucose