Co-Inoculation of Plant-Growth-Promoting Bacteria Modulates Physiological and Biochemical Responses of Perennial Ryegrass to Water Deficit

Perennial ryegrass is a forage commonly used in temperate regions for livestock feeding; however, its yield is affected by reduced biomass production under water deficit. In a previous study, three co-inoculations of beneficial bacteria were selected based on their ability to promote plant growth un...

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Published in:Plants (Basel) 2022-09, Vol.11 (19), p.2543
Main Authors: Cortés-Patiño, Sandra, Vargas, Christian D, Alvarez-Flórez, Fagua, Estrada-Bonilla, German
Format: Article
Language:English
Subjects:
Bacteria
Biofertilizers
Biomass
Carotenoids
Chlorophyll
Comparative analysis
drought
Efficiency
endophytic bacteria
Energy
Environmental aspects
Fertilizers
forage
Grasses
Growth
Herbaspirillum
Inoculation
Irrigation
Livestock
Photochemistry
Physiological aspects
Physiology
Pigments
Plant growth
Plants (botany)
Rehydration
Ryegrasses
Water
Water availability
Water deficit
Water shortages
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creator Cortés-Patiño, Sandra
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description Perennial ryegrass is a forage commonly used in temperate regions for livestock feeding; however, its yield is affected by reduced biomass production under water deficit. In a previous study, three co-inoculations of beneficial bacteria were selected based on their ability to promote plant growth under reduced water availability. The aim of this work was to elucidate some mechanisms by which the selected bacteria can help improve the response of perennial ryegrass to water deficit. Ryegrass plants were inoculated with each of the co-inoculations (Herbaspirillum sp. AP02−Herbaspirillum sp. AP21; Herbaspirillum sp. AP02−Pseudomonas sp. N7; Herbaspirillum sp. AP21−Azospirillum brasilense D7) and subjected to water deficit for 10 days. Physiological and biochemical measurements were taken 10 days after stress and shortly after rehydration. The results showed that bacteria had a positive effect on shoot biomass production, dissipation of excess energy, and proline and chlorophyll pigments during the days of water deficit (p < 0.05). The leaf water status of the inoculated plants was 12% higher than that of the uninoculated control after rehydration. Two Herbaspirillum strains showed greater potential for use as biofertilizers that help ameliorate the effects of water deficit.
doi_str_mv 10.3390/plants11192543
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subjects Bacteria
Biofertilizers
Biomass
Carotenoids
Chlorophyll
Comparative analysis
drought
Efficiency
endophytic bacteria
Energy
Environmental aspects
Fertilizers
forage
Grasses
Growth
Herbaspirillum
Inoculation
Irrigation
Livestock
Photochemistry
Physiological aspects
Physiology
Pigments
Plant growth
Plants (botany)
Rehydration
Ryegrasses
Water
Water availability
Water deficit
Water shortages
title Co-Inoculation of Plant-Growth-Promoting Bacteria Modulates Physiological and Biochemical Responses of Perennial Ryegrass to Water Deficit
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