Effects of foliar and root application of Zn and Fe bio-nanofertilizers on the glucosinolate, Zn and Fe contents of Pak choi (Brassica rapa Subsp. Chinensis) grown under hydroponic and pot cultivation
Carlos Esteban Guardiola-Márquez , María del Carmen Martínez-Ballesta , C. Valentina García-Sánchez , Erika Melissa Bojorquez-Rodríguez , Daniel A. Jacobo-Velázquez , Ginés Benito Martínez-Hernández
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Abstract
Pak choi is a rich source of minerals and health beneficial compounds such as glucosinolates (GSLs). This study is focused on implementing sustainable agronomic approaches to optimize pre-harvest cultivation and improve plant growth and nutritional value. Therefore, the aim of this work was to evaluate the effect of foliar and root fertilization of algae capped ZnO and γ-Fe2O3 nanoparticles on the growth and content of GSLs, Zn and Fe of Pak choi grown under hydroponic floating system and pot conditions. The foliar application of ZnO (77 nm) and γ-Fe2O3 (68 nm) nanoparticles functionalized with an Arthrospira platensis extract increased fresh weight (39.71 %), plant height (42.77 %), leaves number (26.47 %), root length (33.33 %), and Zn (10-fold) and Fe (2-fold) contents in hydroponic plants. The same treatment also improved plant fresh weight (31.73 %), and Zn (6-fold) and Fe (2-fold) in pot cultivated Pak choi. Six GSLs were detected, which were also enhanced by the joint application of nanoparticles and microalgae extract. The results revealed a high synergy between the ZnO- and γ-Fe2O3 nanoparticles and the A. platensis extract to increase plant growth and Zn and Fe micronutrients and glucosinolates in Pak choi grown under hydroponic and pot systems.
期刊介绍：
Scientia Horticulturae is an international journal publishing research related to horticultural crops. Articles in the journal deal with open or protected production of vegetables, fruits, edible fungi and ornamentals under temperate, subtropical and tropical conditions. Papers in related areas (biochemistry, micropropagation, soil science, plant breeding, plant physiology, phytopathology, etc.) are considered, if they contain information of direct significance to horticulture. Papers on the technical aspects of horticulture (engineering, crop processing, storage, transport etc.) are accepted for publication only if they relate directly to the living product. In the case of plantation crops, those yielding a product that may be used fresh (e.g. tropical vegetables, citrus, bananas, and other fruits) will be considered, while those papers describing the processing of the product (e.g. rubber, tobacco, and quinine) will not. The scope of the journal includes all horticultural crops but does not include speciality crops such as, medicinal crops or forestry crops, such as bamboo. Basic molecular studies without any direct application in horticulture will not be considered for this journal.
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