Diving Into Reef Ecosystems for Land-Agriculture Solutions: Coral Microbiota Can Alleviate Salt Stress During Germination and Photosynthesis in Terrestrial Plants

Ocampo-Alvarez, Héctor; Meza-Canales, Iván David; Mateos-Salmón, Carolina; Ríos‐Jara, Eduardo; Rodríguez‐Zaragoza, Fabián Alejandro; Robles-Murguía, Celia; Muñoz‐Urias, Alejandro; Hernández-Herrera, Rosalba Mireya; Choix-Ley, Francisco Javier; Becerril-Espinosa, Amayaly

doi:10.3389/fpls.2020.00648

Cited by 9 publications

(11 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…from the marine soil of Morocco have shown in vitro that both solubilize phosphorous and produce IAA and siderophores [62]. Recently, coral-associated actinobacteria were reported to alleviate salt stress during the germination and photosynthesis of tobacco plants [63]. However, deep-sea actinobacteria have never been explored in terms of their benefits to plants.…”

Section: Introductionmentioning

confidence: 99%

Deep-Sea Actinobacteria Mitigate Salinity Stress in Tomato Seedlings and Their Biosafety Testing

Rangseekaew

Barros-Rodríguez

Pathom-aree

et al. 2021

Plants

View full text Add to dashboard Cite

Soil salinity is an enormous problem affecting global agricultural productivity. Deep-sea actinobacteria are interesting due to their salt tolerance mechanisms. In the present study, we aim to determine the ability of deep-sea Dermacoccus (D. barathri MT2.1T and D. profundi MT2.2T) to promote tomato seedlings under 150 mM NaCl compared with the terrestrial strain D. nishinomiyaensis DSM20448T. All strains exhibit in vitro plant growth-promoting traits of indole-3-acetic acid production, phosphate solubilization, and siderophore production. Tomato seedlings inoculated with D. barathri MT2.1T showed higher growth parameters (shoot and root length, dry weight, and chlorophyll content) than non-inoculated tomato and the terrestrial strain under 150 mM NaCl. In addition, hydrogen peroxide (H2O2) in leaves of tomatoes inoculated with deep-sea Dermacoccus was lower than the control seedlings. This observation suggested that deep-sea Dermacoccus mitigated salt stress by reducing oxidative stress caused by hydrogen peroxide. D. barathri MT2.1T showed no harmful effects on Caenorhabditis elegans, Daphnia magna, Eisenia foetida, and Escherichia coli MC4100 in biosafety tests. This evidence suggests that D. barathri MT2.1T would be safe for use in the environment. Our results highlight the potential of deep-sea Dermacoccus as a plant growth promoter for tomatoes under salinity stress.

show abstract

Section: Introductionmentioning

confidence: 99%

Deep-Sea Actinobacteria Mitigate Salinity Stress in Tomato Seedlings and Their Biosafety Testing

Rangseekaew

Barros-Rodríguez

Pathom-aree

et al. 2021

Plants

View full text Add to dashboard Cite

show abstract

“…They are classified under different actinobacteria families such as Dermacoccaceae, Ornithinimicrobiaceae, Dermabacteriaceae and Brevibacteriaceae, respectively ( Table 1 ). Moreover, additional studies have further isolated actinobacteria from stony corals that have antimicrobial activity [ 23 , 171 ], antifungal activity [ 172 , 173 ], antibacterial activity [ 158 , 174 , 175 , 176 ], plant biostimulant activity [ 177 ] and potent biosurfactant anticancer activity [ 178 ], and those that have had no bioactivity test performed [ 154 , 156 , 179 , 180 , 181 , 182 ] ( Table 1 ).…”

Section: Association Between Scleractinian and Actinomycetesmentioning

confidence: 99%

Marine Actinomycetes Associated with Stony Corals: A Potential Hotspot for Specialized Metabolites

et al. 2022

View full text Add to dashboard Cite

Microbial secondary metabolites are an important source of antibiotics currently available for combating drug-resistant pathogens. These important secondary metabolites are produced by various microorganisms, including Actinobacteria. Actinobacteria have a colossal genome with a wide array of genes that code for several bioactive metabolites and enzymes. Numerous studies have reported the isolation and screening of millions of strains of actinomycetes from various habitats for specialized metabolites worldwide. Looking at the extent of the importance of actinomycetes in various fields, corals are highlighted as a potential hotspot for untapped secondary metabolites and new bioactive metabolites. Unfortunately, knowledge about the diversity, distribution and biochemistry of marine actinomycetes compared to hard corals is limited. In this review, we aim to summarize the recent knowledge on the isolation, diversity, distribution and discovery of natural compounds from marine actinomycetes associated with hard corals. A total of 11 new species of actinomycetes, representing nine different families of actinomycetes, were recovered from hard corals during the period from 2007 to 2022. In addition, this study examined a total of 13 new compounds produced by five genera of actinomycetes reported from 2017 to 2022 with antibacterial, antifungal and cytotoxic activities. Coral-derived actinomycetes have different mechanisms of action against their competitors.

show abstract

“…Recently, it was shown that the marine actinobacteria Salinispora arenicola could establish a symbiotic relationship with seedlings of the wild-tobacco Nicotiana attenuata under in vitro conditions ( Ocampo-Alvarez et al, 2020 ) and relieve saline stress during germination and early growth. As S. arenicola is a saline habitat symbiont that relieves saline stress in the saline-sensitive N. attenuata , it partially fulfills the HAS definition.…”

Section: Introductionmentioning

confidence: 99%

Habitat-adapted heterologous symbiont Salinispora arenicola promotes growth and alleviates salt stress in tomato crop plants

et al. 2022

Self Cite

View full text Add to dashboard Cite

To ensure food security given the current scenario of climate change and the accompanying ecological repercussions, it is essential to search for new technologies and tools for agricultural production. Microorganism-based biostimulants are recognized as sustainable alternatives to traditional agrochemicals to enhance and protect agricultural production. Marine actinobacteria are a well-known source of novel compounds for biotechnological uses. In addition, former studies have suggested that coral symbiont actinobacteria may support co-symbiotic photosynthetic growth and tolerance and increase the probability of corals surviving abiotic stress. We have previously shown that this activity may also hold in terrestrial plants, at least for the actinobacteria Salinispora arenicola during induced heterologous symbiosis with a wild Solanaceae plant Nicotiana attenuata under in vitro conditions. Here, we further explore the heterologous symbiotic association, germination, growth promotion, and stress relieving activity of S. arenicola in tomato plants under agricultural conditions and dig into the possible associated mechanisms. Tomato plants were grown under normal and saline conditions, and germination, bacteria-root system interactions, plant growth, photosynthetic performance, and the expression of salt stress response genes were analyzed. We found an endophytic interaction between S. arenicola and tomato plants, which promotes germination and shoot and root growth under saline or non-saline conditions. Accordingly, photosynthetic and respective photoprotective performance was enhanced in line with the induced increase in photosynthetic pigments. This was further supported by the overexpression of thermal energy dissipation, which fine-tunes energy use efficiency and may prevent the formation of reactive oxygen species in the chloroplast. Furthermore, gene expression analyses suggested that a selective transport channel gene, SlHKT1,2, induced by S. arenicola may assist in relieving salt stress in tomato plants. The fine regulation of photosynthetic and photoprotective responses, as well as the inhibition of the formation of ROS molecules, seems to be related to the induced down-regulation of other salt stress response genes, such as SlDR1A-related genes or SlAOX1b. Our results demonstrate that the marine microbial symbiont S. arenicola establishes heterologous symbiosis in crop plants, promotes growth, and confers saline stress tolerance. Thus, these results open opportunities to further explore the vast array of marine microbes to enhance crop tolerance and food production under the current climate change scenario.

show abstract

Diving Into Reef Ecosystems for Land-Agriculture Solutions: Coral Microbiota Can Alleviate Salt Stress During Germination and Photosynthesis in Terrestrial Plants

Cited by 9 publications

References 70 publications

Deep-Sea Actinobacteria Mitigate Salinity Stress in Tomato Seedlings and Their Biosafety Testing

Deep-Sea Actinobacteria Mitigate Salinity Stress in Tomato Seedlings and Their Biosafety Testing

Marine Actinomycetes Associated with Stony Corals: A Potential Hotspot for Specialized Metabolites

Habitat-adapted heterologous symbiont Salinispora arenicola promotes growth and alleviates salt stress in tomato crop plants

Contact Info

Product

Resources

About