The use of biostimulants as a key to sustainable hydroponic lettuce farming under saline water stress.

Autor: İkiz B; Department of Horticulture, Faculty of Agriculture, University of Cukurova, Adana, 01330, Türkiye., Dasgan HY; Department of Horticulture, Faculty of Agriculture, University of Cukurova, Adana, 01330, Türkiye. dasgan@cu.edu.tr., Balik S; Department of Horticulture, Faculty of Agriculture, University of Cukurova, Adana, 01330, Türkiye., Kusvuran S; Food and Agriculture Vocational School, Cankiri Karatekin University, Çankırı, 18100, Türkiye., Gruda NS; Institute of Plant Sciences and Resource Conservation, Division of Horticultural Sciences, University of Bonn, Bonn, Germany. ngruda@uni-bonn.de.
Jazyk: angličtina
Zdroj: BMC plant biology [BMC Plant Biol] 2024 Aug 28; Vol. 24 (1), pp. 808. Date of Electronic Publication: 2024 Aug 28.
DOI: 10.1186/s12870-024-05520-8
Abstrakt: Backround: The utilization of high-quality water in agriculture is increasingly constrained by climate change, affecting availability, quality, and distribution due to altered precipitation patterns, increased evaporation, extreme weather events, and rising salinity levels. Salinity significantly challenges salt-sensitive vegetables like lettuce, particularly in a greenhouse. Hydroponics water quality ensures nutrient solution stability, enhances nutrient uptake, prevents contamination, regulates pH and electrical conductivity, and maintains system components. This study aimed to mitigate salt-induced damage in lettuce grown via the floating culture method under 50 mM NaCl salinity by applying biostimulants.
Results: We examined lettuce's physiological, biochemical, and agronomical responses to salt stress after applying biostimulants such as amino acids, arbuscular mycorrhizal fungi, plant growth-promoting rhizobacteria (PGPR), fulvic acid, and chitosan. The experiment was conducted in a greenhouse with a randomized complete block design, and each treatment was replicated four times. Biostimulant applications alleviated salt's detrimental effects on plant weight, height, leaf number, and leaf area. Yield increases under 50 mM NaCl were 75%, 51%, 31%, 34%, and 33% using vermicompost, PGPR, fulvic acid, amino acid, and chitosan, respectively. Biostimulants improved stomatal conductance (58-189%), chlorophyll content (4-10%), nutrient uptake (15-109%), and water status (9-107%). They also reduced MDA content by 26-42%. PGPR (1.0 ml L ‒1 ), vermicompost (2 ml L ‒1 ), and fulvic acid (40 mg L ‒1 ) were particularly effective, enhancing growth, yield, phenol, and mineral content while reducing nitrate levels under saline conditions.
Conclusions: Biostimulants activated antioxidative defense systems, offering a sustainable, cost-effective solution for mitigating salt stress in hydroponic lettuce cultivation.
(© 2024. The Author(s).)
Databáze: MEDLINE
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