Boron Supply and Water Deficit Consequences in Young Paricá (Schizolobium parahyba var. amazonicum) Plants
| Autor: | Bianca do Carmo SILVA, Pêola Reis de SOUZA, Daihany Moraes CALLEGARI, Vanessa Ferreira ALVES, Allan Klynger da Silva LOBATO, Elaine Maria Silva Guedes LOBATO |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
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 abiotic stress antioxidant compounds gas exchange Forestry SD1-669.5 Agriculture (General) S1-972 |
| Zdroj: | Notulae Botanicae Horti Agrobotanici Cluj-Napoca, Vol 44, Iss 1, Pp 250-256 (2016) |
| Druh dokumentu: | article |
| ISSN: | 0255-965X 1842-4309 |
| DOI: | 10.15835/nbha44110136 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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