Effects of deficit irrigation (DI) and partial root drying (PRD) on gas exchange, biomass partitioning, and water use efficiency in potato

2006 ◽  
Vol 109 (2) ◽  
pp. 113-117 ◽  
Author(s):  
Fulai Liu ◽  
Ali Shahnazari ◽  
Mathias N. Andersen ◽  
Sven-Erik Jacobsen ◽  
Christian R. Jensen
Keyword(s):  
Gas Exchange ◽  
Water Use Efficiency ◽  
Water Use ◽  
Deficit Irrigation ◽  
Biomass Partitioning ◽  
Use Efficiency ◽  
Partial Root Drying

scholarly journals Combined effects of deficit irrigation and strobilurin application on gas exchange, yield and water use efficiency in tomato (Solanum lycopersicum L.)

2018 ◽  
Vol 233 ◽  
pp. 149-158 ◽  
Author(s):  
Marcella Michela Giuliani ◽  
Federica Carucci ◽  
Eugenio Nardella ◽  
Matteo Francavilla ◽  
Luigi Ricciardi ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Water Use Efficiency ◽  
Solanum Lycopersicum ◽  
Water Use ◽  
Deficit Irrigation ◽  
Combined Effects ◽  
Solanum Lycopersicum L ◽  
Use Efficiency

scholarly journals IRRIGATION DEFICIT STRATEGIES ON PHYSIOLOGICAL AND PRODUCTIVE PARAMETERS OF 'TOMMY ATKINS' MANGO

2016 ◽  
Vol 29 (1) ◽  
pp. 173-182 ◽  
Author(s):  
MARCELO ROCHA DOS SANTOS ◽  
SÉRGIO LUIZ RODRIGUES DONATO ◽  
EUGÊNIO FERREIRA COELHO ◽  
PAULO ROBERTO FERNANDES COTRIM JUNIOR ◽  
IGOR NOGUEIRA DE CASTRO
Keyword(s):  
Gas Exchange ◽  
Water Use Efficiency ◽  
Water Use ◽  
Deficit Irrigation ◽  
Root Zone ◽  
Leaf Temperature ◽  
Maturation Stage ◽  
Regulated Deficit Irrigation ◽  
Irrigation Deficit ◽  
Use Efficiency

ABSTRACT: The objective of this work was to evaluate the gas exchange, leaf temperature, yield and water use efficiency in 'Tommy Atkins' mango under irrigation deficit strategies. The experimental design was randomized block, with seven treatments with regulated deficit irrigation (RDI) under micro-spray and five treatments with partial root-zone drying (PRD) under drip irrigation. The treatments on RDI consisted of application of 100, 75 and 50% of ETc at the stages S1 (beginning of flowering to fruit set) S2 (fruit development) and S3 (fruit physiological maturation). The treatments on PRD consisted of application of 100, 80, 60 and 40% of ETc, in the same three stages, alternating the irrigation side every 15 days. The regulated deficit irrigation causes less negative interference in gas exchange than the partial root-zone drying, and the climate factors affect the gas exchange and leaf temperature of 'Tommy Atkins' mango more than the regulated deficit irrigation. The partial root-zone drying irrigation with 60 and 40% of ETc causes a decrease in the 'Tommy Atkins' mango yield. The regulated deficit irrigation up to 50% of ETc, applied at the fruit maturation stage, maintain the yield and water use efficiency.

Bunchgrass architecture, light interception, and water-use efficiency: assessment by fiber optic point quadrats and gas exchange

Oecologia ◽  
1983 ◽  
Vol 59 (2-3) ◽  
pp. 178-184 ◽  
Author(s):  
M. M. Caldwell ◽  
T. J. Dean ◽  
R. S. Nowak ◽  
R. S. Dzurec ◽  
J. H. Richards
Keyword(s):  
Gas Exchange ◽  
Water Use Efficiency ◽  
Water Use ◽  
Fiber Optic ◽  
Light Interception ◽  
Efficiency Assessment ◽  
Use Efficiency

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

2016 ◽  
Vol 44 (1) ◽  
pp. 250-256 ◽  
Author(s):  
Bianca do Carmo SILVA ◽  
Pêola Reis de SOUZA ◽  
Daihany Moraes CALLEGARI ◽  
Vanessa Ferreira ALVES ◽  
Allan Klynger da Silva LOBATO ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Stomatal Conductance ◽  
Gas Exchange ◽  
Water Use Efficiency ◽  
Water Deficit ◽  
Water Use ◽  
Electrolyte Leakage ◽  
Tolerance Mechanism ◽  
Schizolobium Parahyba ◽  
Use Efficiency

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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