Propagação, produção de biomassa e teor de flavonoides de ipomoea cairica (L.) sweet

Abstract

Ipomoea is the geners with a lot of specific riches, the largest within the family Convolvulaceae. Ipomoea cairica (L.) Sweet or morningglory is reportly by many specialists as a weed in several crops mainly cereals. It is widely used in folk medicine, where its leaves and roots are used to treat skin rashes, hepatitis, as antiinflammatory and anti rheumatic. Aiming to further studies on I. cairica this study assessed: The viability of their seeds, propagation by cuttings with the use of agrohomeopathy; and the production of biomass and flavonoid content of the culture under water stress. Three tests have carried out: 1°) sexual propagation I. cairica, with seeds harvested in 2011 and 2012 under different temperature and luminosity; 2°) vegetative propagation, testing four concentrations of the homeophatic medicine Arnica montana (3, 6, 12, 24 CH) and distilled water as a control; 3°) the response of I. cairica into four levels of water stress (25, 50, 75 and 100 % of por capacity) for 30 days. There were obtained 57 and 52% normal plantlets in 2011 and 2012, respectively, as best temperatures for germination 20 and 25°C, with plants having good adaptability for transplantation in the pond. With 77% of cuttings rooted in 21 days, the homeopathic medicine contributed to the biomass and dry weight of shoot cuttings. Over the 30 days of water stress, the a chlorophyll content remained constant and b chlorophyll decreased. After 30 days subject to water, the species has 100% survival, with more than half of its biomass (58,6%) originated from the root system, and the shoot had 0, 315 μg/mL flavonoids. The species is resistant to drought and with the potential to provide flavonoids