Role of Silicon and Salicylic Acid in the Mitigation of Nitrogen Deficiency Stress in Rice Plants

Application of silicon (Si) and salicylic acid (SA) mitigates plant stress; however, this effect is not known under nitrogen (N) deficiency conditions in rice plants. The objective of the present study was to determine whether foliar application with a soluble form of Si and SA, individually or in c...

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Bibliographic Details
Published in:SILICON 2020-05, Vol.12 (5), p.997-1005
Main Authors: Deus, Angélica Cristina Fernandes, de Mello Prado, Renato, de Cássia Félix Alvarez, Rita, de Oliveira, Raimundo Leonardo Lima, Felisberto, Guilherme
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Crop yield
Environmental Chemistry
Inorganic Chemistry
Lasers
Lignin
Materials Science
Nitrogen
Optical Devices
Optics
Original Paper
Photonics
Plant stress
Polymer Sciences
Rice
Salicylic acid
Silicon
Stoichiometry
Transpiration
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Summary:Application of silicon (Si) and salicylic acid (SA) mitigates plant stress; however, this effect is not known under nitrogen (N) deficiency conditions in rice plants. The objective of the present study was to determine whether foliar application with a soluble form of Si and SA, individually or in combination, could mitigate N deficiency stress in rice plants. The treatments consisted of application of 3.45 g L −1 Si only (sprayed on the leaves), 4.5 mM SA only, a combination of both, and no application as control. Net CO 2 assimilation rate, transpiration, lignin and carbon contents, C:N:P:Si stoichiometric ratio and grain yield were evaluated. Foliar application of Si combined with SA or isolated application of SA did not mitigate N deficiency stress in rice plants. However, silicon application increased rice yield by 18.6% in N-deficient conditions. Our results show that the beneficial effects of Si under nitrogen deficient conditions are related to the stoichiometry change in C with Si and increases of lignin synthesis.
ISSN:1876-990X
1876-9918
DOI:10.1007/s12633-019-00195-5