TITLE:
Effect of Growth Regulators in Production and Rooting of Coffea arabica L. Minicuttings
AUTHORS:
Paulo Fernando Marques Cavalcanti Filho, Diego Corona Baitelle, Sílvio de Jesus Freitas, Waldinei Souza da Silva, Paulo Cesar dos Santos, Weverton Pereira Rodrigues, Silvério de Paiva Freitas, Ismael Lourenço de Jesus Freitas, Tamara Locatelli, Abraão Carlos Verdin Filho, Guilherme Bessa Miranda
KEYWORDS:
Arabica Coffee, Ministumps, Clonal Propagation
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.4,
March
12,
2018
ABSTRACT: The plants of C.
arabica do not naturally produce a large number of orthotropic sprouts,
hindering clonal multiplication by cutting, which would be the simplest
technique with a lower cost of production compared to other methods of
vegetative propagation. An alternative form, used successfully in the
propagation of eucalyptus, is propagation by minicutting, which consists of
pruning the shoot apex of the plant, forming the ministumps, which in variable
time interval emits the shoots that will be used to make minicutting. In C. arabica plants the number of shoots
can be increased with the application of growth regulators and fertilizers. So,
the purpose of this work was to verify the effect of growth regulators and
foliar fertilizers on the emission and development of orthotropic shoots of C. arabica. The experiment was installed
in a randomized complete block design, with ten treatments composed by growth
regulators and fertilizers: T1 (Control); T2 (Stimulate + Sturdy + Enervig); T3
(Stimulate + Vitakelp + Biozyme); T4 (Tiba + Sturdy + Enervig); T5 (Tiba +
Vitakelp + Biozyme); T6 (Brs + Sturdy + Enervig) T7 (Brs + Vitakelp + Biozyme);
T8 (Stimulate); T9 (TIBA); T10 (Brs-Brassinoesteroid), each plot consisting of
two plants. Biometric and physiological parameters were evaluated for the
ministumps, as well as the biometric parameters of the shoots and plant
survival. The results showed that there was no influence of the treatments on
the biometric parameters of the ministumps. A greater number of orthotopic
sprouts were obtained in treatments with the TIBA growth regulator, as well as
a greater plant survival of the minicuttings, after 25 days of transplanting in
a greenhouse. It was concluded that TIBA treatments influenced the production
and quality of clonal minicuttings of C. arabica.