The increasing of the human population requires solutions for sustainable agricultural practices to preserve the environment. Appropriate “eco-friendly” fertilization protocols, applied in growth chambers or greenhouse, could maximize the crop yield avoiding the massive utilization of chemicals in agriculture. Soil microorganisms (i.e. mycorrhizae and rhizobacteria) could represent a promising solution enriching soil with beneficial compounds. At the same time, the choice of specific light quality regimens during growth also may be considered a suitable tool in improving crop production increasing photosynthesis. Some light wavelengths affect the formation of mycorrhizas in soils, promoting plant growth and physiological performance. This study aimed to asses if the modulation of light quality may influence the plants-microbe interaction, determining changes in physiological, morphological and biochemical traits in Spinacia oleracea L. plants. At this purpose, not-inoculated (NI) and inoculated (I) spinach seeds with a mix of fungi and rhizobacteria were grown in a climatic chamber under four different light quality treatments: white (W), Red (R, 100%), Red-Blue (RB, 60:40% Blue), Red-Green-Cyan (RGC, 60:20:20%) at light intensity of 350 mol photons m-2 s-1. Plant growth has been followed up to 100 days after sowing (DAS) and leaf functional traits, photosynthesis, pigments and bioactive compounds were measured. Light spectrum composition and biofertilizer influenced plant growth through a different morphology and biomass allocation. More specifically R and RGC induced a greater leaf area and stem elongation, while RB and biofertilizer promoted roots development. The combination light quality/biofertilization positively affects gas exchanges and determines significant changes in antioxidants. The results of this study may be considered encouraging in the planning of new fertilization protocols for the cultivation of crop species on a broad scale in the framework of sustainable agriculture.

New insights in plant ecophysiological performance: the combined action of light quality and biofertilization.

Vitale E.;Arena C.
2018

Abstract

The increasing of the human population requires solutions for sustainable agricultural practices to preserve the environment. Appropriate “eco-friendly” fertilization protocols, applied in growth chambers or greenhouse, could maximize the crop yield avoiding the massive utilization of chemicals in agriculture. Soil microorganisms (i.e. mycorrhizae and rhizobacteria) could represent a promising solution enriching soil with beneficial compounds. At the same time, the choice of specific light quality regimens during growth also may be considered a suitable tool in improving crop production increasing photosynthesis. Some light wavelengths affect the formation of mycorrhizas in soils, promoting plant growth and physiological performance. This study aimed to asses if the modulation of light quality may influence the plants-microbe interaction, determining changes in physiological, morphological and biochemical traits in Spinacia oleracea L. plants. At this purpose, not-inoculated (NI) and inoculated (I) spinach seeds with a mix of fungi and rhizobacteria were grown in a climatic chamber under four different light quality treatments: white (W), Red (R, 100%), Red-Blue (RB, 60:40% Blue), Red-Green-Cyan (RGC, 60:20:20%) at light intensity of 350 mol photons m-2 s-1. Plant growth has been followed up to 100 days after sowing (DAS) and leaf functional traits, photosynthesis, pigments and bioactive compounds were measured. Light spectrum composition and biofertilizer influenced plant growth through a different morphology and biomass allocation. More specifically R and RGC induced a greater leaf area and stem elongation, while RB and biofertilizer promoted roots development. The combination light quality/biofertilization positively affects gas exchanges and determines significant changes in antioxidants. The results of this study may be considered encouraging in the planning of new fertilization protocols for the cultivation of crop species on a broad scale in the framework of sustainable agriculture.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/752475
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