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- Title
Boron Supply and Water Deficit Consequences in Young Paricá (Schizolobium parahyba var. amazonicum) Plants.
- Authors
do Carmo SILVA, Bianca; de SOUZA, Pêola Reis; CALLEGARI, Daihany Moraes; ALVES, Vanessa Ferreira; da Silva LOBATO, Allan Klynger; Silva Guedes LOBATO, Elaine Maria
- 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.
- Subjects
EFFECT of boron on plants; WATER shortages; ABIOTIC stress; ANTIOXIDANTS; HYDROGEN peroxide
- Publication
Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 2016, Vol 44, Issue 1, p250
- ISSN
0255-965X
- Publication type
Article
- DOI
10.15835/nbha44110136