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

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

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...

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Bibliographic Details
Main Authors: Bianca do Carmo SILVA, Pêola Reis de SOUZA, Daihany Moraes CALLEGARI, Vanessa Ferreira ALVES, Allan Klynger da Silva LOBATO, Elaine Maria Silva Guedes LOBATO
Format: Article
Language:English
Published: AcademicPres 2016-06-01
Series:Notulae Botanicae Horti Agrobotanici Cluj-Napoca
Subjects:
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
Online Access:http://www.notulaebotanicae.ro/index.php/nbha/article/view/10136

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http://www.notulaebotanicae.ro/index.php/nbha/article/view/10136

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