Figure 1. General mechanism after elicitor perception. Abbreviations: SAR (systemic adquired response), ISR (induced systemic resistance), ROS (Reactive oxygen species), RNS (reactive nitrogen species), NADPH (nicotinamide adenine dinucleotide phosphate), SA (salicylic acid), JA (jasmonic acid), ET (ethylene) [48,49,50].
Figure 2. Factors influencing bioactive compounds in plant response.
Baenas, N.; García-Viguera, C.; Moreno, D.A. Elicitation: A Tool for Enriching the Bioactive Composition of Foods. Molecules 2014, 19, 13541-13563.
Abstract
Elicitation is a good strategy to induce physiological changes and stimulate defense or stress-induced responses in plants. The elicitor treatments trigger the synthesis of phytochemical compounds in fruits, vegetables and herbs. These metabolites have been widely investigated as bioactive compounds responsible of plant cell adaptation to the environment, specific organoleptic properties of foods, and protective effects in human cells against oxidative processes in the development of neurodegenerative and cardiovascular diseases and certain types of cancer. Biotic (biological origin), abiotic (chemical or physical origin) elicitors and phytohormones have been applied alone or in combinations, in hydroponic solutions or sprays, and in different selected time points of the plant growth or during post-harvest. Understanding how plant tissues and their specific secondary metabolic pathways respond to specific treatments with elicitors would be the basis for designing protocols to enhance the production of secondary metabolites, in order to produce quality and healthy fresh foods.
Conclusions
Understanding how plant tissues and their specific secondary metabolic pathways respond to different abiotic and biotic stresses, applied alone or in combinations, would be the basis for designing strategies to enhance phytochemicals in foods. The accurate determination of the effect, driven by the use of the distinct elicitors applied in selected time points of the plant growth, may allow strategies and tools to obtain tailored foods with enhanced health-promoting phytochemicals [69]. The resulting products and ingredients could be considered for functional foods or nutraceutical development that will provide benefits beyond basic nutrition and/or claims for health benefits.
See more at
Nenhum comentário:
Postar um comentário