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Supplemental blue light increases growth and quality of greenhouse pak choi depending on cultivar and supplemental light intensity

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Journal of Integrative Agriculture 2018年第10期17卷 2245-2256页

作者： ZHENG Yin-jian ZHANG Yi-ting LIU Hou-cheng LI Ya-min LIU Ying-liang HAO Yan-wei LEI Bing-fu College of Horticulture South China Agricultural University College of Materials and Energy South China Agricultural University

To evaluate the supplementary blue light intensity on growth and health-promoting compounds in pak choi（Brassica campestris *** ***）,four blue light intensity treatments（T0,T50,T100 and T150 indicate 0,50,100,and 150μmol m^（-2） s^（-1）,respectively）were applied 10 days before harvest under greenhouse *** of cultivars（greenand red-leaf pak choi）under T50 had the highest yield,content of chlorophyll and *** light intensity increasing,antioxidant compounds（vitamin C and carotenoids）significantly increased,while nitrate content showed an opposite *** health-promoting compounds（phenolics,flavonoids,anthocyanins,and glucosinolates）were significantly higher under supplementary light treatment than T0,so as the antioxidant capacity（2,2-diphenyl-1-picrylhydrazyl and ferric-reducing antioxidant power）.The species-specific differences in photosynthetic pigment and health-promoting compounds was found in green-and red-leaf pak choi.T50 treatment could be used for yield improvement,whereas T100 treatment could be applied for quality *** showed that blue light intensity can regulate the accumulation of biomass,morphology and health-promoting compounds in pak choi under greenhouse conditions.

关键词： blue light antioxidant compounds health-promoting compounds species-specific pak choi

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Application of two forms of silicon and their impact on the postharvest and the content of bioactive compounds in cucumber(Cucumis sativus L.)fruits

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BIOCELL 2022年第11期46卷 2497-2506页

作者： YOLANDA GONZÁLEZ-GARCÍA VALERIA FLORES-ROBLES GREGORIO CADENAS-PLIEGO ADALBERTO BENAVIDES-MENDOZA MARCELINO CABRERA DE LA FUENTE ALBERTO SANDOVAL-RANGEL ANTONIO JUÁREZ-MALDONADO Departamento de Botánica Universidad Autónoma Agraria Antonio NarroSaltillo25315México Maestría en Ciencias en Horticultura Universidad Autónoma Agraria Antonio NarroSaltillo25315México Centro de Investigación en Química Aplicada Saltillo25294México Departamento de Horticultura Universidad Autónoma Agraria Antonio NarroSaltillo25315México

The metabolic activity of the fruits continues even after harvest,which results in the loss of bioactive compounds,a decrease in the quality of the fruits,softening and browning,among other negative *** use of certain elements such as silicon can improve postharvest quality,since it is involved in the metabolic,physiological and structural activity of plants,moreover can increase the quality of the *** addition,nanotechnology has had a positive impact on crop yield,nutritional value,fruit quality and can improve antioxidant *** these reasons,the use of beneficial elements such as silicon in the form of nanoparticles can be a viable option to improve the characteristics of the *** the present study was evaluated the application of potassium silicate(125,250 and 500 mg L^(−1))and SiO_(2) nanoparticles(125,250 and 500 mg L^(−1))during the development of the *** results showed that the application of silicon(potassium silicate and silicon nanoparticles)increased the content of total soluble solids(up to 15.6%higher than control),titratable acidity(up to 38.8%higher than control),vitamin C(up to 78.2%higher than control),phenols(up to 22%higher than control),flavonoids(up to 64.6%higher than control),and antioxidant activity in lipophilic compounds(up to 56.2%higher than control).This study suggests that the use of silicon can be a good option to increase the content of bioactive compounds in cucumber fruits when they are applied during the development of the crop.

关键词： Fruit quality Nanotechnology Silicon nanoparticles Potassium silicate antioxidant compounds antioxidant capacity

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