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- Author or Editor: Ricardo D. Lardizabal x
- HortScience x
Abstract
Hydroponic culture of sweet potato [Ipomoea batatas (L.) Lam.] inhibited storage root formation and reduced flower numbers compared to peat-lite medium in three of four cultivars. Elevated levels of B, Mg, and Fe in the nutrient solution increased flower numbers in ‘Southern Delite’. Flower numbers in ‘Southern Delite’ also were increased by grafting onto Ipomoea carnea Jacq. ssp. fistulosa (Mart. ex Choisy) D. Austin. Grafting ‘Shore Gold’ onto I. carnea increased flower numbers when grown in peat-lite, but not in hydroponic culture. GA3 and ethephon produced higher flower numbers than the control treatment in ‘Shore Gold’, but ABA and BA did not. ‘Southern Delite’ did not respond to growth regulator application. Chemical names used: [S-(Z,E)]-[5-(1-hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3-methyl-2,4-pentadienoic acid [abscisic acid (ABA)], N-(phenylmethyl)-1H-purin-6-amine (BA), (2,4-dichlorophenoxy) acetic acid (2,4-D), (2-chloroethyl) phosponic acid (ethephon), and (1α,2β,4aα,4bβ,10β)-2,4a,7-trihydroxy-1-methyl-8-methylenegibb-3-ene-1,10-dicarboxylic acid, 1,4a-lactone (GA3).