Regarding the hormonal aspect, it is necessary to have a balance between auxins, cytokinins and gibberellins, which can be exogenously applied, such as indolebutyric acid or naphthalene acetic acid, which increase auxin content and consequently increase the rooting rate.
The main auxins used for rooting of cuttings are indoleacetic acid (IAA), indolebutyric acid (IBA) and naphthalene acetic acid (NAA).
FIGURE 4: Number of roots in minicuttings of yerba mate submitted to different concentrations of IBA (indolebutyric acid
) and collection season (2014-2015).
CASARIN (2015) evaluated the effects of different concentrations of indolebutyric acid
(IBA) (0, 1000, 2000 and 3000 mg.[L.sup.-1]) on minicutting rooting of six olive cultivars (Ascolano 315, Coratina, Frantoio, Grappolo 541, Leccino and Maria da Fe).
This phytotoxicity to indolebutyric acid
is due to hormona imbalance when the cuttings are in contact with auxins.
The influence of harversting season and indolebutyric acid
application on cuttings of Tibouchina pulchra (Cham.) Cogn.
As in this present study, in an experiment with different types of substrates and indolebutyric acid
doses (IBA) on the production of air layering of the umbu fruit tree, Dutra et al.
TABLE 1--Characteristics evaluated in vine roorstock cuttings treated with 2,4-dichlorophenoxyacetic acid (2,4-D) and indolebutyric acid
ROOTING OF SEMI-HARDWOOD CUTTINGS OF BLUEBERRY UNDER DIFFERENT INDOLEBUTYRIC ACID
The present study aimed to evaluate the effect of types of cuttings and indolebutyric acid
concentration on the vegetative propagation of L.
Several studies have evaluated the effect of the indolebutyric acid
(IBA) on rooting of stem cuttings in fruit tree species.
Thus, this research was carried out with the aim to study the propagation of Drimys brasiliensis by rooting of semihard wood cuttings, subjected to different concentrations of indolebutyric acid
(IBA), collected in four seasons of the year (autumn, winter, spring and summer).