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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sodium benzoate inhibits germination, establishment and development of rice plants

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Author(s):
Moschetto, Fernanda Augusto [1] ; Lopes, Marina Fagundes [1] ; Silva, Bruno Pereira [1] ; Lima Neto, Milton Costa [1]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ Unesp, Biosci Inst, Plant Metab Lab, Coastal Campus, Sao Vicente, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY; v. 31, n. 3, p. 377-385, SEP 2019.
Web of Science Citations: 0
Abstract

Sodium benzoate (NaB) is widely used as food and drink preservative. However, little is known about the phytotoxic effects of NaB on plants. The aim of this study was to evaluate the phytotoxicity effects of exogenous sodium benzoate on seed germination and seedling establishment of rice plants. Seeds were treated with 0, 5 and 10 mM of NaB in a growth chamber with controlled conditions. NaB decreased the germination rate, plant growth and biomass accumulation. Increasing NaB concentration resulted in disruption of cell membranes, disturbance of the plant water status and degradation of the photosynthetic pigments. In addition, NaB decreased photosynthesis and transpiration rates in rice seedling and triggered non-photochemical quenching (NPQ). The NPQ was able to avoid photoinhibition in rice seedlings exposed to NaB. On the other hand, the harmful effects were related with increases in the production of reactive oxygen species, primarily H2O2. Rice plants exposed to 5 mM NaB triggered antioxidant defenses with increased activities of superoxide dismutase (SOD), ascorbate peroxidases (APX) and catalase (CAT). In contrast, the exposure of 10 mM of NaB decreased the activities of these enzymes. Our data clearly show that NaB triggered phytotoxicity effects in rice seedlings, impairing growth, photosynthesis and development. (AU)

FAPESP's process: 18/04258-6 - Impacts of the Photoinhibition of Photosystem I and its Photoprotective Mechanisms on the Photosynthetic Efficiency
Grantee:Milton Costa Lima Neto
Support Opportunities: Regular Research Grants