{"title":"Physiological response of tomato plants grown in saline and non-saline soils to foliar application of SiO2/TiO2 nanocomposites","authors":"Gisela Adelina Rolón-Cárdenas, Vicente Rodríguez-González","doi":"10.1016/j.bcab.2025.103536","DOIUrl":null,"url":null,"abstract":"<div><div>Silicon dioxide (SiO<sub>2</sub>) and titanium dioxide (TiO<sub>2</sub>) nanoparticles have been shown to enhance growth and mitigate the adverse effects of salinity stress in various crops. This study investigated the effects of SiO<sub>2</sub>/TiO<sub>2</sub> nanocomposites (NCs) on tomato plants (<em>Solanum lycopersicum</em>) under both normal and salt-stress conditions. For this purpose, tomato plants were irrigated with 0, 60, or 120 mM NaCl solutions for 30 days. Fifteen days after initiating the salt treatment, SiO<sub>2</sub>/TiO<sub>2</sub> NC suspensions at concentrations of 0, 50, 100, and 500 mg/L were applied via foliar spray. The results showed that, under non-saline conditions, foliar application of SiO<sub>2</sub>/TiO<sub>2</sub> NCs significantly increased the number of leaves, shoot dry weight, total chlorophyll, carotenoid content, soluble sugars, anthocyanins, and total phenolic content in tomato plants. Under saline conditions, the positive effects of SiO<sub>2</sub>/TiO<sub>2</sub> NCs varied depending on the NaCl concentration in the soil. In plants exposed to 60 mM NaCl, SiO<sub>2</sub>/TiO<sub>2</sub> NCs improved shoot fresh weight, total chlorophyll content, proline and soluble sugar levels, catalase activity and reduced H<sub>2</sub>O<sub>2</sub> content, as well as increased total phenolic and anthocyanin content. These findings suggest that the SiO<sub>2</sub>/TiO<sub>2</sub> NC application increases biomass production and improves the salt tolerance of tomato plants. Therefore, these nanomaterials could be a promising option for promoting tomato growth in slightly and moderately saline soils.</div></div>","PeriodicalId":8774,"journal":{"name":"Biocatalysis and agricultural biotechnology","volume":"65 ","pages":"Article 103536"},"PeriodicalIF":3.8000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biocatalysis and agricultural biotechnology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1878818125000490","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/19 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Silicon dioxide (SiO2) and titanium dioxide (TiO2) nanoparticles have been shown to enhance growth and mitigate the adverse effects of salinity stress in various crops. This study investigated the effects of SiO2/TiO2 nanocomposites (NCs) on tomato plants (Solanum lycopersicum) under both normal and salt-stress conditions. For this purpose, tomato plants were irrigated with 0, 60, or 120 mM NaCl solutions for 30 days. Fifteen days after initiating the salt treatment, SiO2/TiO2 NC suspensions at concentrations of 0, 50, 100, and 500 mg/L were applied via foliar spray. The results showed that, under non-saline conditions, foliar application of SiO2/TiO2 NCs significantly increased the number of leaves, shoot dry weight, total chlorophyll, carotenoid content, soluble sugars, anthocyanins, and total phenolic content in tomato plants. Under saline conditions, the positive effects of SiO2/TiO2 NCs varied depending on the NaCl concentration in the soil. In plants exposed to 60 mM NaCl, SiO2/TiO2 NCs improved shoot fresh weight, total chlorophyll content, proline and soluble sugar levels, catalase activity and reduced H2O2 content, as well as increased total phenolic and anthocyanin content. These findings suggest that the SiO2/TiO2 NC application increases biomass production and improves the salt tolerance of tomato plants. Therefore, these nanomaterials could be a promising option for promoting tomato growth in slightly and moderately saline soils.
二氧化硅（SiO2）和二氧化钛（TiO2）纳米颗粒已被证明可以促进多种作物的生长并减轻盐胁迫的不利影响。研究了SiO2/TiO2纳米复合材料（NCs）在正常和盐胁迫条件下对番茄（Solanum lycopersicum）生长的影响。为此，番茄植株分别用0、60或120 mM NaCl溶液灌溉30天。盐处理15天后，通过叶面喷施浓度分别为0、50、100和500 mg/L的SiO2/TiO2 NC悬浮液。结果表明，在无盐条件下，叶面施用SiO2/TiO2纳米材料显著提高了番茄叶片数量、茎部干重、总叶绿素、类胡萝卜素、可溶性糖、花青素和总酚含量；在盐渍条件下，SiO2/TiO2 NCs的积极作用随土壤中NaCl浓度的变化而变化。在60 mM NaCl处理下，SiO2/TiO2 NCs提高了植株鲜重、总叶绿素含量、脯氨酸和可溶性糖含量、过氧化氢酶活性，降低了H2O2含量，提高了总酚和花青素含量。综上所述，SiO2/TiO2的NC施用增加了番茄生物量，提高了番茄植株的耐盐性。因此，这些纳米材料可能是促进番茄在轻度和中度盐碱地生长的一个有希望的选择。
期刊介绍：
Biocatalysis and Agricultural Biotechnology is the official journal of the International Society of Biocatalysis and Agricultural Biotechnology (ISBAB). The journal publishes high quality articles especially in the science and technology of biocatalysis, bioprocesses, agricultural biotechnology, biomedical biotechnology, and, if appropriate, from other related areas of biotechnology. The journal will publish peer-reviewed basic and applied research papers, authoritative reviews, and feature articles. The scope of the journal encompasses the research, industrial, and commercial aspects of biotechnology, including the areas of: biocatalysis; bioprocesses; food and agriculture; genetic engineering; molecular biology; healthcare and pharmaceuticals; biofuels; genomics; nanotechnology; environment and biodiversity; and bioremediation.
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