Brassinosteroids (BRs) have been used in woody plants to increase the rooting response. In this research, (22S, 23S)-homobrassinolide (SSHB) was tested, alone and in combination with indole-3-butyric acid potassium salt (K-IBA), to promote olive clonal propagation. In November, cuttings of two Italian cultivars, Leccino (easy-to-root) and Leccio del Corno (difficult-to-root), were collected and forced to root. Two studies were carried out: 1) evaluation of the influence on rooting of K-IBA and of different concentrations of SSHB; 2) evaluation of the simultaneous use of K-IBA and two concentrations of SSHB, on adventitious root formation. Samples were also collected for chemical studies. Results obtained in both studies confirmed the positive effect of K-IBA on rooting percentage and on number of adventitious roots produced. Furthermore, SSHB had a positive influence on the formation of lateral roots; the response is genotype and treatment dependent. Soluble sugars and phenol composition at the rooted cutting base is differentially influenced by the genotype and the growth regulators used.
Ganino, T., Chiancone, B., Beghè, D., Rodolfi, M., Fabbri, A., Petruccelli, R., Ughini, V., Influence of (22S, 23S)-homobrassinolide on olive rooting, Abstract de <<VIII International olive symposium>>, (Split, Croatia, 10-14 October 2016 ), Institute for Adriatic crops, Split 2016: 105-105. 10.17660/ActaHortic.2018.1199.52 [http://hdl.handle.net/10807/94952]
Influence of (22S, 23S)-homobrassinolide on olive rooting
Ughini, VirginiaUltimo
2016
Abstract
Brassinosteroids (BRs) have been used in woody plants to increase the rooting response. In this research, (22S, 23S)-homobrassinolide (SSHB) was tested, alone and in combination with indole-3-butyric acid potassium salt (K-IBA), to promote olive clonal propagation. In November, cuttings of two Italian cultivars, Leccino (easy-to-root) and Leccio del Corno (difficult-to-root), were collected and forced to root. Two studies were carried out: 1) evaluation of the influence on rooting of K-IBA and of different concentrations of SSHB; 2) evaluation of the simultaneous use of K-IBA and two concentrations of SSHB, on adventitious root formation. Samples were also collected for chemical studies. Results obtained in both studies confirmed the positive effect of K-IBA on rooting percentage and on number of adventitious roots produced. Furthermore, SSHB had a positive influence on the formation of lateral roots; the response is genotype and treatment dependent. Soluble sugars and phenol composition at the rooted cutting base is differentially influenced by the genotype and the growth regulators used.
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