Thermotolerant Soil Microbes and Their Role in Mitigation of Heat Stress in Plants

Maitra, Sagar; Pramanick, Biswajit; Dey, Prithwiraj; Bhadra, Preetha; Shankar, Tanmoy; Kumar, Anand

doi:10.1007/978-3-030-73507-4_8

Cited by 9 publications

(5 citation statements)

References 245 publications

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“…Unlike obligate symbionts, PGPR can interact with numerous host plants, modifying the RSA to improve the plant’s health and stress tolerance through a multitude of direct and indirect mechanisms [ 26 , 27 , 28 ]. These include the formation of biofilms; the production of phytohormones (e.g., jasmonic acid, salicylic acid, gibberellins, indole-3-acetic acid (IAA)), exopolysaccharides, and 1-aminocyclopropane 1-carboxylic acid (ACC) deaminase [ 74 , 75 ]; the production of cell-wall-degrading enzymes, antibiotics, hydrogen cyanide, siderophores and quorum quenching [ 24 , 76 ]. These PGPR-induced modifications of the RSA allow for the enhanced functions of different root regions, which are responsible for soil exploration for nutrient acquisition [ 77 ].…”

Section: Discussionmentioning

confidence: 99%

“…The use of plant growth-promoting rhizobacteria (PGPR), in addition to the above, is another strategy that can contribute to agricultural sustainability [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…In the present context of rising global temperatures, it is useful to study PGPR which also have thermotolerant traits. In the past, several thermotolerant microbial strains were identified [ 24 , 34 ], including Burkholderia phytofirmans [ 35 ]. Paraburkholderia, which is a more recently described new genus that is delineated from Burkholderia, contains many species that assist the plants’ growth [ 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

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Plant Growth Promotion and Heat Stress Amelioration in Arabidopsis Inoculated with Paraburkholderia phytofirmans PsJN Rhizobacteria Quantified with the GrowScreen-Agar II Phenotyping Platform

Macabuhay

Arsova

Watt

et al. 2022

Plants

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High temperatures inhibit plant growth. A proposed strategy for improving plant productivity under elevated temperatures is the use of plant growth-promoting rhizobacteria (PGPR). While the effects of PGPR on plant shoots have been extensively explored, roots—particularly their spatial and temporal dynamics—have been hard to study, due to their below-ground nature. Here, we characterized the time- and tissue-specific morphological changes in bacterized plants using a novel non-invasive high-resolution plant phenotyping and imaging platform—GrowScreen-Agar II. The platform uses custom-made agar plates, which allow air exchange to occur with the agar medium and enable the shoot to grow outside the compartment. The platform provides light protection to the roots, the exposure of it to the shoots, and the non-invasive phenotyping of both organs. Arabidopsis thaliana, co-cultivated with Paraburkholderia phytofirmans PsJN at elevated and ambient temperatures, showed increased lengths, growth rates, and numbers of roots. However, the magnitude and direction of the growth promotion varied depending on root type, timing, and temperature. The root length and distribution per depth and according to time was also influenced by bacterization and the temperature. The shoot biomass increased at the later stages under ambient temperature in the bacterized plants. The study offers insights into the timing of the tissue-specific, PsJN-induced morphological changes and should facilitate future molecular and biochemical studies on plant–microbe–environment interactions.

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Section: Discussionmentioning

confidence: 99%

“…The use of plant growth-promoting rhizobacteria (PGPR), in addition to the above, is another strategy that can contribute to agricultural sustainability [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plant Growth Promotion and Heat Stress Amelioration in Arabidopsis Inoculated with Paraburkholderia phytofirmans PsJN Rhizobacteria Quantified with the GrowScreen-Agar II Phenotyping Platform

Macabuhay

Arsova

Watt

et al. 2022

Plants

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“…The results suggest that SN13 positively controls the expression of stress-responsive genes and phytohormones, suggesting its multidimensional role in stress response. The differential responses of rice seedlings to heat stress and phytohormones were confirmed using principal component analysis (PCA) based on the effects of SN13 inoculation on the response of rice to heat stress and phytohormone treatments [ 58 ].…”

Section: Role Of Microorganisms In Thermotolerancementioning

confidence: 99%

A Review on the Role of Endophytes and Plant Growth Promoting Rhizobacteria in Mitigating Heat Stress in Plants

et al. 2022

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Among abiotic stresses, heat stress is described as one of the major limiting factors of crop growth worldwide, as high temperatures elicit a series of physiological, molecular, and biochemical cascade events that ultimately result in reduced crop yield. There is growing interest among researchers in the use of beneficial microorganisms. Intricate and highly complex interactions between plants and microbes result in the alleviation of heat stress. Plant–microbe interactions are mediated by the production of phytohormones, siderophores, gene expression, osmolytes, and volatile compounds in plants. Their interaction improves antioxidant activity and accumulation of compatible osmolytes such as proline, glycine betaine, soluble sugar, and trehalose, and enriches the nutrient status of stressed plants. Therefore, this review aims to discuss the heat response of plants and to understand the mechanisms of microbe-mediated stress alleviation on a physio-molecular basis. This review indicates that microbes have a great potential to enhance the protection of plants from heat stress and enhance plant growth and yield. Owing to the metabolic diversity of microorganisms, they can be useful in mitigating heat stress in crop plants. In this regard, microorganisms do not present new threats to ecological systems. Overall, it is expected that continued research on microbe-mediated heat stress tolerance in plants will enable this technology to be used as an ecofriendly tool for sustainable agronomy.

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“…Plants are living entities exposed to continuous variable conditions that challenge their life from seedling to harvesting stage, leading to lower yield and creating major complications biotically and abiotically to researchers and scientists working all over the globe. This includes pathogens, insect-pests, nematodes as biotic agents, and abiotic factors such as heat, cold, nutrient deficiencies, heavy metal toxicities, drought, and salinity [1,2]. A fundamental question arises that "how plants overcome these adverse conditions and maintain their balance is the primary question of concern."…”

Section: Introductionmentioning

confidence: 99%

Abiotic stress signaling in plants and transgenic technology as a triumph: A review

Manepalli¹,

Tomar²,

Gaikwad³

et al. 2022

J App Biol biotech

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The plants are exposed seasonally and continuously to various environmental and biodiversity stresses that inhibit and affect their life processes from seedling to harvest stage. Several irregularities are seen in light intensity, temperature, mineral and water availability, etc. These changes keep on challenges the plant to grow and reproduce itself and produce several environmental signals. To receive these signals, the plants themselves develop a signaling network with several receptors such as phytohormones, G-protein-coupled receptors, kinases, and hormone receptors. Signal transduction produces a cellular response in plants which initiates the physiological and developmental responses. This article reveals a keen and in-depth analysis of several mechanisms and perceptions of signal transduction during exposure to several kinds of abiotic stresses in plants, along with a generic pathway of signaling in plants. Plant abiotic stress often plays a pivotal role in causing losses through salinity, heat, cold, drought, etc. To understand and overcome these problems through conventional breeding, which was mainly dependent on genetic variations, several studies are going on model plants such as Arabidopsis, rice, and Brachypodium; the accessibility of sources for these genomes is in the processing stage in wheat. On the other hand, the advancements in genome editing opened the doors for scientists to incorporate the desired trait in a particular plant species. The emerging developments in the secondgeneration genome editing technologies like CRISPR/cas9 paved the path for plant biologists to develop a trait more efficiently and rapidly, unlike conventional breeding methods. This review plots the importance of signaling during abiotic stress and transgene technology to prevail over abiotic stress in plants by ingesting desired traits in a plant.

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Thermotolerant Soil Microbes and Their Role in Mitigation of Heat Stress in Plants

Cited by 9 publications

References 245 publications

Plant Growth Promotion and Heat Stress Amelioration in Arabidopsis Inoculated with Paraburkholderia phytofirmans PsJN Rhizobacteria Quantified with the GrowScreen-Agar II Phenotyping Platform

Plant Growth Promotion and Heat Stress Amelioration in Arabidopsis Inoculated with Paraburkholderia phytofirmans PsJN Rhizobacteria Quantified with the GrowScreen-Agar II Phenotyping Platform

A Review on the Role of Endophytes and Plant Growth Promoting Rhizobacteria in Mitigating Heat Stress in Plants

Abiotic stress signaling in plants and transgenic technology as a triumph: A review

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