The bases of the cuttings were immersed for 10 min in solutions with different concentrations of the
auxin IBA (1.5, 15, 150, and 1500 mg [L.sup.-1]), containing 100 mg [L.sup.-1] boron or zinc.
Significant increase in seedling vigour may result due to increased synthesis of
auxins (Grobelak and Hiller, 2017).
There are many factors that may explain this hypothesis, such as the distribution and the hormonal balance in the propagative material used, especially because
auxin is the main hormone associated with rooting in plants (GUAN et al., 2015; PACURAR et al., 2014).
Previous research has documented that synthetic
auxins herbicides drift onto sensitive soybean can cause many negative effects, such as reduction of seed weight, lower seed quality, lower seed oil and protein concentration, pod malformation and impacts on progeny (ROBINSON et al., 2013a, 2013b; SOLOMON & BRADLEY, 2014; KESOJU et al., 2016; MILLER & NORSWORTH, 2017).
(2007) corroborate with this statement and argue that the benefits provided by diazotrophic bacteria are linked to the plant hormones production, such as
auxins, gibberellins and cytokinins that are able to stimulate plant growth, especially roots.
Effects of
auxins and cytokinins on the development of Coffea arabica L.
The indole-3-butyric acid (IBA) is an effective
auxin to promote rooting of cuttings in a large number of species.
Changes in the concentrations of
auxins and polyamines during rooting of in vitro propagated walnut shoots.
Soybean, cotton (Gossypium hirsutum L.), and grain sorghum (Sorghum bicolor) are among the crop species most susceptible to synthetic
auxin herbicides, such as dicamba, 2,4-D, and florpyrauxifen-benzyl.
All the leaves were removed from stem cuttings, and the cuttings were dipped in 0.1% bavistin (fungicide, BASF Ltd, Mumbai) solution (w/v) for 5 min subsequently washed with distilled water, and treated with root promoting
auxins.
Laurain-Mattar, "Influence of
auxins on somatic embryogenesis and alkaloid accumulation in Leucojum aestivum callus," Central European Journal of Biology, vol.
Plant growth regulators such as G[A.sub.3] and
auxins having the ability to increase cell enlargement, thus enhancing fruit growth in wax apple[6].