Nano-selenium, silicon and H2O2 boost growth and productivity of cucumber under combined salinity and heat stress

Shalaby, Tarek; Abd-Alkarim, Emad; El-Aidy, F.; Hamed, El-Samahy; Sharaf-Eldin, Mohamed; Taha, Naglaa; El-Ramady, Hassan; Bayoumi, Yousry; Reis, André Rodrigues dos

doi:10.1016/j.ecoenv.2021.111962

Cited by 104 publications

(41 citation statements)

References 60 publications

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“…An addition to the nutrient solution of either sodium silicate (Na 2 SiO 3 ), sodium silicate-derived metasilicic acid (H 2 SiO 3 ), or engineered nanosilica at the rate of 0.3 [43,107], 0.8 mM [104], and 200 ppm [108], respectively, have proven to significantly increase the germination rates, fresh and dry weights, decrease the sodium content in roots or leaves, and increase the root hydraulic conductivity of salinized cucumber plants. Moreover, a better physiological status, as in higher photosynthetic rate and F v /F m , was recorded than the untreated salt-stressed controls, and comparable results were also obtained when combined heat and salinity stresses were applied [109][110][111]. This is also true for zucchini squash (Cucurbita pepo L.) and watermelon (Citrullus lanatus Thunb.…”

Section: Biostimulants Substances To Increase Cucurbit Resilience To Stresssupporting

confidence: 57%

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

2021

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Climate change is a pressing matter of anthropogenic nature to which agriculture contributes by abusing production inputs such as inorganic fertilizers and fertigation water, thus degrading land and water sources. Moreover, as the increase in the demand of food in 2050 is estimated to be 25 to 70% more than what is currently produced today, a sustainable intensification of agriculture is needed. Biostimulant substances are products that the EU states work by promoting growth, resistance to plant abiotic stress, and increasing produce quality, and may be a valid strategy to enhance sustainable agricultural practice. Presented in this review is a comprehensive look at the scientific literature regarding the widely used and EU-sanctioned biostimulant substances categories of silicon, seaweed extracts, protein hydrolysates, and humic substances. Starting from their origin, the modulation of plants’ hormonal networks, physiology, and stress defense systems, their in vivo effects are discussed on some of the most prominent vegetable species of the popular plant groupings of cucurbits, leafy greens, and nightshades. The review concludes by identifying several research areas relevant to biostimulant substances to exploit and enhance the biostimulant action of these substances and signaling molecules in horticulture.

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Section: Biostimulants Substances To Increase Cucurbit Resilience To Stresssupporting

confidence: 57%

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

2021

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“…Cucumber, an annual creeping vine plant in the Cucurbitaceae gourd family, is an important cash crop widely cultivated in temperate and tropical regions around the world [43]. In this study, cucumber was used as the subject of the photorespiration model.…”

Section: Data Accessmentioning

confidence: 99%

A Machine Learning Model for Photorespiration Response to Multi-Factors

Zheng

Bao

et al. 2021

Horticulturae

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Photorespiration results in a large amount of leaf photosynthesis consumption. However, there are few studies on the response of photorespiration to multi-factors. In this study, a machine learning model for the photorespiration rate of cucumber leaves’ response to multi-factors was established. It provides a theoretical basis for studies related to photorespiration. Machine learning models of different methods were designed and compared. The photorespiration rate was expressed as the difference between the photosynthetic rate at 2% O2 and 21% O2 concentrations. The results show that the XGBoost models had the best fit performance with an explained variance score of 0.970 for both photosynthetic rate datasets measured using air and 2% O2, with mean absolute errors of 0.327 and 0.181, root mean square errors of 1.607 and 1.469, respectively, and coefficients of determination of 0.970 for both. In addition, this study indicates the importance of the features of temperature, humidity and the physiological status of the leaves for predicted results of photorespiration. The model established in this study performed well, with high accuracy and generalization ability. As a preferable exploration of the research on photorespiration rate simulation, it has theoretical significance and application prospects.

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“…Nano-biofortification is a new approach, which has used to produce biofortified crops rich in some micro-nutrients like nano-selenium (El-Ramady et al 2020a), nano-iron (Guha et al 2018(Guha et al , 2021, nano-zinc (Dimkpa et al 2019and Du et al 2019), and nano-copper (Lopez-Vargas et al 2018. Nano-biofortification could be performed by seed priming (De La Torre-Roche et al 2020), foliar application (Knijnenburg et al 2018;Shalaby et al 2021) and soil application (Fakharzadeh et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Is Nano-Biofortification the Right Approach for Malnutrition in the Era of COVID-19 and Climate change?

et al. 2021

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H UMAN health may depend on the environment and its compartments, which may include climatic factors. These climatic factors and their changes might impact on human health particularly the outbreak of pandemics like COVID-19. The combined stress resulted from climate changes and COVID-19 could be noticed in several countries especially in the developing countries. Malnutrition is considered one of the most important problems in the developing countries in particular under the droughts, flooding, and other climatic events. Malnutrition was aggravated under COVID-19 outbreak in these countries due to the closure of borders between countries, the crisis of global trade, and the global food insecurity. The biofortification process is the sustainable solution to overcome malnutrition, which included very recently using nano-nutrients as called nano-biofortification. The approach of nanobiofortification is a promising tool in producing biofortified edible plants, otherwise this tool still needs more studies to answer the open questions like which nano-nutrients can be used in nano-biofortification? Which recommended doses and crops are considered suitable candidates?

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Nano-selenium, silicon and H2O2 boost growth and productivity of cucumber under combined salinity and heat stress

Cited by 104 publications

References 60 publications

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

A Machine Learning Model for Photorespiration Response to Multi-Factors

Is Nano-Biofortification the Right Approach for Malnutrition in the Era of COVID-19 and Climate change?

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