%0 Journal Article
%T Association of Indolebutyric Acid with Azospirillum brasilense in the Rooting of Herbaceous Blueberry Cuttings
%A Douglas Mariani Zeffa
%A Henrique Mitsuharu Saito
%A Leandro Sim£¿es Azeredo Gon£¿alves
%A Renata Koyama
%A Ricardo Tadeu Faria
%A Sergio Ruffo Roberto
%A Walter Aparecido Ribeiro J¨²nior
%J Horticulturae | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/horticulturae5040068
%X Association between auxins and plant growth-promoting bacteria can stimulate root growth and development of fruit crop nursery plants, and can be a promising biological alternative to increase the rooting of cuttings. The objective of this study was to assess the viability of producing ¡®Powderblue¡¯ blueberry nursery plants from cuttings using different doses of indolebutyric acid (IBA) in association with Azospirillum brasilense. The following treatments were tested: 0 (control); 500 mg L £¿1 of IBA; 1000 mg L £¿1 of IBA; A. brasilense; 500 mg L £¿1 of IBA + A. brasilense; and 1000 mg L £¿1 of IBA + A. brasilense. The experimental design was completely randomized, with six treatments and four replicates, and each plot (box) consisted of 10 cuttings. The boxes were arranged in a mist chamber with an intermittent regimen controlled by a timer and solenoid valve. After 90 days, the following variables were assessed: rooted cuttings; survival of cuttings; foliar retention; sprouting; cuttings with callus; root dry mass per cutting; number of roots per cutting; and root length. It was observed that the application of IBA with the A. brasilense rhizobacteria increased the number of roots of ¡®Powderblue¡¯ blueberry cuttings, while the treatments with IBA alone and IBA 1000 mg L £¿1 + A. brasilense increased the root length of cuttings. However, treatments with IBA and A. brasilense had no impact on % rooted cuttings and % survival of cuttings. View Full-Tex
%U https://www.mdpi.com/2311-7524/5/4/68