Augmentation of Antioxidant Constituents by Drought Stress to Roots in Leafy Vegetables

Autor:	Yuichi Uno, Ryohei Koyama, Syuji Kimura, Hiromichi Itoh, Ai Morioka
Rok vydání:	2012
Předmět:	chemistry.chemical_classification Rhizosphere Drought stress Reactive oxygen species Antioxidant biology Chemistry medicine.medical_treatment fungi food and beverages Lactuca Horticulture biology.organism_classification Agronomy Polyphenol medicine Leafy vegetables Sugar
Zdroj:	HortTechnology. 22:121-125
ISSN:	1943-7714 1063-0198
DOI:	10.21273/horttech.22.1.121
Popis:	Plants can synthesize some antioxidants, including L-ascorbic acid (AsA) and polyphenol, in response to environmental stresses. Antioxidants detoxify reactive oxygen species in plants and also aid in human health. In this study, we demonstrate that a novel hydroponic treatment can increase leafy vegetable nutritional quality without retarding growth. Leaf lettuce (Lactuca sativa) was grown hydroponically and subjected to rhizosphere drought stress by lowering the water level in the solution tub before harvesting. Appropriate drought stress using this method could increase AsA, polyphenol, and sugar content by 24%, 50%, and 17%, respectively, and decrease nitrate nitrogen content by 18% without reducing yield. Similar effects of drought stress on AsA content were observed in four other plant species. This hydroponic method has a universal potential to increase leafy vegetable quality without reducing yield in controlled environments such as plant factories.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::77c84a10b7157dbd333af7116036ba92 https://doi.org/10.21273/horttech.22.1.121 Zobrazit plný text záznamu