Boron Supply and Water Deficit Consequences in Young Paricá (<i>Schizolobium parahyba</i> var.<i> amazonicum</i>) Plants

  • Bianca do Carmo SILVA Universidade Federal Rural da Amazônia, Paragominas, Pará
  • Pêola Reis de SOUZA Universidade Federal Rural da Amazônia, Paragominas, Pará
  • Daihany Moraes CALLEGARI Universidade Federal Rural da Amazônia, Paragominas, Pará
  • Vanessa Ferreira ALVES Universidade Federal Rural da Amazônia, Paragominas, Pará
  • Allan Klynger da Silva LOBATO Universidade Federal Rural da Amazônia, Paragominas, Pará
  • Elaine Maria Silva Guedes LOBATO Universidade Federal Rural da Amazônia, Paragominas, Pará

Abstract

Boron (B) is a very important nutrient required by forest plants; when supplied in adequate amounts, plants can ameliorate the negative effects of abiotic stresses. The objective of this study was to (i) investigate gas exchange, (ii) measure oxidant and antioxidant compounds, and (iii) respond how B supply acts on tolerance mechanism to water deficit in young Schizolobium parahyba plants. The experiment employed a factorial that was entirely randomised, with two boron levels (25 and 250 µmol L-1, simulating conditions of sufficient B and high B, respectively) and two water conditions (control and water deficit). Water deficit induced negative modifications on net photosynthetic rate, stomatal conductance and water use efficiency, while B high promoted intensification of the effects on stomatal conductance and water use efficiency. Hydrogen peroxide and electrolyte leakage of both tissues suffered non-significant increases after B high and when applied water deficit. Ascorbate levels presented increases after water deficit and B high to leaf and root. Our results suggested that the tolerance mechanism to water deficit in young Schizolobium parahyba plants is coupled to increases in total glutathione and ascorbate aiming to control the overproduction of hydrogen peroxide and alleviates the negative consequences on electrolyte leakage and gas exchange. In relation to B supply, this study proved that sufficient level promoted better responses under control and water deficit conditions.

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Published
2016-06-14
How to Cite
SILVA, B. do C., SOUZA, P. R. de, CALLEGARI, D. M., ALVES, V. F., LOBATO, A. K. da S., & LOBATO, E. M. S. G. (2016). Boron Supply and Water Deficit Consequences in Young Paricá (<i>Schizolobium parahyba</i> var.<i> amazonicum</i&gt;) Plants. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 44(1), 250-256. https://doi.org/10.15835/nbha44110136
Section
Research Articles

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