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

A - Papers appearing in refereed journals

Cortes, S., Vargas, C. D., Alvarez-Florez, F. and Estrada-Bonilla, G. 2022. Co-Inoculation of Plant-Growth-Promoting Bacteria Modulates Physiological and Biochemical Responses of Perennial Ryegrass to Water Deficit. Plants - Basel. 11, p. 2543. https://doi.org/10.3390/plants11192543

AuthorsCortes, S., Vargas, C. D., Alvarez-Florez, F. and Estrada-Bonilla, G.
Abstract

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.

KeywordsDrought; Livestock; Forage; Photochemistry; Endophytic bacteria
Year of Publication2022
JournalPlants - Basel
Journal citation11, p. 2543
Digital Object Identifier (DOI)https://doi.org/10.3390/plants11192543
Open accessPublished as bronze (free) open access
Publisher's version
Output statusPublished
Publication dates
Online28 Sep 2022
Publication process dates
Accepted23 Sep 2022
PublisherMDPI
ISSN2223-7747

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