Abstract
ABSTRACT This study aimed to evaluate the salt tolerance of 'Mimo do Céu' orange grafted onto three rootstocks using physiological parameters such as maximum quantum efficiency of photosystem II (PSII) and the production of fruits. It also evaluated the effectiveness of increased nitrogen (N) fertilization in reducing the effects of salt stress. Two concomitant experiments were carried out under controlled conditions, using drainage lysimeters. The Experiment I evaluated the effects of the application of five levels of saline water on three combinations of scion-rootstocks grafted with 'Mimo de Ceu' orange, in a randomized block design with three replicates in a 5 x 3 factorial scheme. The Experiment II evaluated the application of two N levels (100 and 200% of recommendation) in three scion-rootstock combinations irrigated with water of electrical conductivity of 3.0 dS m-1, in a 3 x 2 factorial scheme, with three replicates. The maximum quantum efficiency of PSII was inhibited in citrus plants under salt stress. 'Mimo do Ceu' orange grafted onto 'Common' Rangpur lime has higher yield potential. The increase in N dose did not reduce the deleterious effects of water salinity on fruit production.
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Claims 3
Claim · model-written summary
Salt stress inhibited maximum PSII quantum efficiency.
Not reportedComparator
Verbatim
e0“The maximum quantum efficiency of PSII was inhibited in citrus plants under salt stress”
t0“orange”
Claim · model-written summary
Orange grafted onto Common Rangpur lime had higher yield potential.
Verbatim
e0“'Mimo do Ceu' orange grafted onto 'Common' Rangpur lime has higher yield potential”
Claim · model-written summary
Increased nitrogen did not reduce salinity harm to fruit production.
Verbatim
e0“The increase in N dose did not reduce the deleterious effects of water salinity on fruit production”
t0“orange”
e1“100 and 200% of recommendation”
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