Endophytic Bacteria in Plant Salt Stress Tolerance: Current and Future Prospects

Vaishnav, Anukool; Shukla, Awadhesh Kumar; Sharma, Anjney; Kumar, Roshan; Choudhary, Devendra Kumar

doi:10.1007/s00344-018-9880-1

Cited by 118 publications

(111 citation statements)

References 121 publications

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“…In addition, increased proline content protects membrane proteins and enzymes from oxidative burst (Szabados and Savouré, 2010). Several studies have confirmed the ability of microbes to mitigate the effects of oxidative bursts by increasing the activity of osmolyte contents and antioxidant enzymes (Khanna et al, 2019;Rajput et al, 2019;Vaishnav et al, 2019;Zahir et al, 2019). Interestingly, BHU-AV3-inoculated plant leaves exhibited less proline content compared to un-inoculated plants.…”

Section: Discussionmentioning

confidence: 98%

“…Salinity response in plants is a complex mechanism involving regulation of both physiological and molecular processes. The modification or activation of different metabolic processes during salt stress is controlled by the plant's innate immunity and the habitat-imposed immunity provided by associated microbes (Vaishnav et al, 2019). A group of plant-beneficial microbes are known as plant growth-promoting rhizobacteria (PGPR), and they provide various benefits to the plants under both biotic and abiotic stresses.…”

Section: Introductionmentioning

confidence: 99%

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Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

Vaishnav

Singh

et al. 2020

Front. Microbiol.

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Salt tolerant bacteria can be helpful in improving a plant's tolerance to salinity. Although plant-bacteria interactions in response to salt stress have been characterized, the precise molecular mechanisms by which bacterial inoculation alleviates salt stress in plants are still poorly explored. In the present study, we aimed to determine the role of a salt-tolerant plant growth-promoting rhizobacteria (PGPR) Sphingobacterium BHU-AV3 for improving salt tolerance in tomato through investigating the physiological responses of tomato roots and leaves under salinity stress. Tomato plants inoculated with BHU-AV3 and challenged with 200 mM NaCl exhibited less senescence, positively correlated with the maintenance of ion balance, lowered reactive oxygen species (ROS), and increased proline content compared to the non-inoculated plants. BHU-AV3-inoculated plant leaves were less affected by oxidative stress, as evident from a reduction in superoxide contents, cell death, and lipid peroxidation. The reduction in ROS level was associated with the increased antioxidant enzyme activities along with multiple-isoform expression [peroxidase (POD), polyphenol oxidase (PPO), and superoxide dismutase (SOD)] in plant roots. Additionally, BHU-AV3 inoculation induced the expression of proteins involved in (i) energy production [ATP synthase], (ii) carbohydrate metabolism (enolase), (iii) thiamine biosynthesis protein, (iv) translation protein (elongation factor 1 alpha), and the antioxidant defense system (catalase) in tomato roots. These findings have provided insight into the molecular mechanisms of bacteria-mediated alleviation of salt stress in plants. From the study, we can conclude that BHU-AV3 inoculation effectively induces antioxidant systems and energy metabolism in tomato roots, which leads to whole plant protection during salt stress through induced systemic tolerance.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

Vaishnav

Singh

et al. 2020

Front. Microbiol.

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“…In both agricultural and natural niches, plants encounter a combination of abiotic conditions, including drought and/or heat shock stress [95][96][97][98]. The tolerance to drought stress is often explained by enhanced accumulation of several solutes (i.e., osmolytes) in tissues of endophyte-infected plants and/or by reduced leaf conductance and the formation of a thicker cuticle [99,100]. The perennial ryegrass (Lolium perenne) is a cool-season grass species and it is one of the most important forage, pasture, and turf grasses.…”

Section: Studies Of Improvement Of Ecological Adaptation Of the Host mentioning

confidence: 99%

Agricultural and Other Biotechnological Applications Resulting from Trophic Plant-Endophyte Interactions

2019

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Endophytic microbiota plays a role not only in supplying plants with the basic nutrients indispensable for their growth, but also helps them in the mechanisms of adaptation to various environmental stresses (i.e., salinity, drought), which is important in the aspect of crop yields. From the agricultural and biotechnological points of view, the knowledge of endophytes and their roles in increasing crop yields, plant resistance to diseases, and helping to survive environmental stress is extremely desirable. This paper reviews some of the beneficial plant–microbe interactions that might be potentially used in both agriculture (plant growth stimulation effect, adaptation of host organisms in salinity and drought conditions, and support of defense mechanisms in plants), and in biotechnology (bioactive metabolites, application of endophytes for bioremediation and biotransformation processes, and production of biofertilizers and biopreparations). Importantly, relatively recent reports on endophytes from the last 10 years are summarized in this paper.

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“…shown that endophytes actively colonize plants, interact with their host, and frequently show 393 beneficial effects on plant growth and health (Vaishnav et al, 2019). Still, the mechanisms of plant-394 endophyte interaction and fungal adaption to the plant environment are poorly understood.…”

Section: De Novo Assembly and Analysis 379mentioning

confidence: 99%

Beyond the greenhouse: coupling environmental and salt stress response reveals unexpected global transcriptional regulatory networks inSalicornia bigelovii

Chelaifa

Dieng

Idaghdour

et al. 2020

Preprint

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Endophytic Bacteria in Plant Salt Stress Tolerance: Current and Future Prospects

Cited by 118 publications

References 121 publications

Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

Agricultural and Other Biotechnological Applications Resulting from Trophic Plant-Endophyte Interactions

Beyond the greenhouse: coupling environmental and salt stress response reveals unexpected global transcriptional regulatory networks inSalicornia bigelovii

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