Physiological responses of beet plants irrigated with saline water and silicon application

Although not considered an essential element, silicon can be used to increase crop productivity, especially under stress conditions. In this sense, the objective was to evaluate the gas exchange of beet plants irrigated with saline water depending on the application of silicon. The experiment was co...

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Bibliographic Details
Published in:Comunicata Scientiae 2020-03, Vol.11, p.E3113-8
Main Authors: Melo Filho, José Sebastião de, Silva, Toshik Iarley da, Gonçalves, Anderson Carlos de Melo, Sousa, Leonardo Vieira de, Véras, Mario Leno Martins, Dias, Thiago Jardelino
Format: Article
Language:English
Subjects:
Abiotic stress
Agricultural production
Carbon
Carboxylation
Conductance
Crop production
Efficiency
Electrical conductivity
Electrical resistivity
Evaluation
Experiments
Gas analyzers
Gas exchange
Infrared analysis
Irrigation
Irrigation water
Photosynthesis
Physiological responses
Physiology
Plants
Potassium
Saline water
Salinity
Silicon
Stomata
Stomatal conductance
Transpiration
Water use
Water use efficiency
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Summary:Although not considered an essential element, silicon can be used to increase crop productivity, especially under stress conditions. In this sense, the objective was to evaluate the gas exchange of beet plants irrigated with saline water depending on the application of silicon. The experiment was conducted in a randomized block design, in a 5 x 5 factorial, referring to five levels of electrical conductivity of irrigation water (ECw): (0.5; 1.3; 3.25; 5.2 and 6.0 dS m-1) and five doses of silicon (0.00; 2.64; 9.08; 15.52 and 18.16 mL L-1), with six beet plants as an experimental unit. The effect of treatments on beet culture was evaluated at 30 and 60 days after irrigation with saline water from measurements of internal carbon concentration, stomatal conductance, net photosynthesis rate, instantaneous water use efficiency and instantaneous carboxylation efficiency using the LCpro+Sistem infrared gas analyzer (IRGA). Irrigation with saline water reduced the gas exchange of beet plants at 60 days after irrigation, but at 30 days after irrigation, the use of saline water increased stomatal conductance, transpiration rate and internal carbon concentration. The application of silicon decreased stomatal conductance, internal carbon concentration and efficiency in the use of water, but increased the rate of net photosynthesis, the rate of transpiration and instantaneous efficiency of carboxylation at 30 and 60 days after irrigation.
ISSN:2176-9079
2179-9079
2177-5133
DOI:10.14295/cs.v11i0.3113