RESPON EKOFISIOLOGI UBI CILEMBU (Ipomoea batatas (L.) Lam) TERHADAP CEKAMAN KEKERINGAN DAN PENINGKATAN GAS CO2

• Main Author: FIRMANIAH (NIM : 10613013), FADILLA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27066
• Institution: Institut Teknologi Bandung

<p align="justify">Increased CO2 emissions that have lasted for the past two decades, caused global warming and were followed by drought phenomena. It is feared could decrease world food production. In this study combination of drought treatment and increased levels of CO2 were given to Cilembu sweet potato plant (Ipomoea batatas (L.) Lam) var. rancing. Treatment was given to Cilembu yam plant 2.5 months for 10 weeks. Intensity of drought stress 20% and 40% field capacity (KL), while for control 80% KL. Increased CO2 levels were given at 740 ppm and 1110 ppm, with 370 ppm as control, for 6 hours daily. Measurement of growth and physiological parameters was done twice in harvest time, ie at week 5 and to 10. The growth parameters observed included leaf number, leaf area, shoot dry weight, root dry weight, and tuber weight. Physiological parameters measured include relative leaf water content, chlorophyll content, and proline level. Based on the results of the study, it can be concluded that Cilembu sweet potato respond to drought stress and increased CO2 by increasing leaf area by 30.48% in first harvest and 39, 60% in second harvest and root proline level of 65,33% in first harvest and 79,25% in second harvest, but decrease dry weight of crop at first harvest equal to 66,86% and 77,28% at second harvest and water content leaf relative at both harvest was 24,94% and 37,68%. Cilembu sweet potato plants have a good ability to survive the drought stress. Increased levels of CO2 do not consistently provide increased endurance in plants.<p align="justify">