Effects of Exogenous Application of Indole-3-Butyric Acid on Maize Plants Cultivated in the Presence or Absence of Cadmium
Auxins are plant hormones that affect plant growth, development, and improve a plant’s tolerance to stress. In this study, we found that the application of indole-3-butyric acid (IBA) had diverse effects on the growth of maize (<i>Zea mays</i> L.) roots treated without/with Cd. IBA cause...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/2be84619fe7d4ee594e518d2e153f88c |
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| Sumario: | Auxins are plant hormones that affect plant growth, development, and improve a plant’s tolerance to stress. In this study, we found that the application of indole-3-butyric acid (IBA) had diverse effects on the growth of maize (<i>Zea mays</i> L.) roots treated without/with Cd. IBA caused changes in the growth and morphology of the roots under non-stress conditions; hence, we were able to select two concentrations of IBA (10<sup>−11</sup> M as stimulatory and 10<sup>−7</sup> M as inhibitory). IBA in stimulatory concentration did not affect the concentration of H<sub>2</sub>O<sub>2</sub> or the activity of antioxidant enzymes while IBA in inhibitory concentration increased only the concentration of H<sub>2</sub>O<sub>2</sub> (40.6%). The application of IBA also affected the concentrations of mineral nutrients. IBA in stimulatory concentration increased the concentration of N, K, Ca, S, and Zn (5.8–14.8%) and in inhibitory concentration decreased concentration of P, K, Ca, S, Fe, Mn, Zn, and Cu (5.5–36.6%). Moreover, IBA in the concentration 10<sup>−9</sup> M had the most positive effects on the plants cultivated with Cd. It decreased the concentration of H<sub>2</sub>O<sub>2</sub> (34.3%), the activity of antioxidant enzymes (23.7–36.4%), and increased the concentration of all followed elements, except Mg (5.5–34.1%), when compared to the Cd. |
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