Pengaruh Osmopriming Benih terhadap Pertumbuhan dan Morfofisiologi Tanaman Kangkung Darat (Ipomoea reptans Poir) pada Cekaman Kekeringan
Drought stress is one of the inhibiting factors in the cultivation of kangkoong (Ipomoea reptans Poir). Solutions to overcome that problems are seed osmopriming. This experiment aimed to investigate the effect of seed osmopriming on the growth and morphophysiological of kangkoong in drought stress. The experiment was conducted from September 2015 to April 2016 on the Plant Physiology Laboratory and FALITMA of UGM, Yogyakarta. This experiment used a randomized block design with two treatments, namely seed osmopriming (0%, 5%, 10%, and 15% (w/v) PEG 6000) and drought stress (watering interval of 1, 3, and 5 days). The observation traits were germination percentage, germination rate, germination synchronization, root length, root dry weight, crown dry weight, leaf chlorophyll content, and leaf proline content. Statistical analysis included analyses of variance followed by DMRT at a confidence level of 95%. The results showed that a concentration of 15% PEG significantly increased germination percentage, germination rate, germination synchronization, root length, roots dry weight, crowns dry weight, leaves proline content, and concentration of 10% PEG significantly increased leaves chlorophyll content in drought stress. Seed osmopriming was effectively used to overcome drought stress problem on the cultivation of kangkoong.
Keywords: germination percentage, PEG 6000, root length, watering interval