Soil Bacteria Support and Protect Plants Against Abiotic Stresses

Carmen, B.; Defez, Roberto

doi:10.5772/23310

Cited by 48 publications

(34 citation statements)

References 161 publications

(150 reference statements)

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“…Plant growth-promoting bacteria (PGPB) exert beneficial effects on various plants and play an important role in plant growth promotion, biological control and also resistance to abiotic stress [1][2][3]. PGPB promote growth of plants in a variety of environments by direct and indirect mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Survey of Plant Drought-Resistance Promoting Bacteria from Populus euphratica Tree Living in Arid Area

Wang

Ouyang

et al. 2014

Indian J Microbiol

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Two hundred and thirty-two bacterial strains were isolated from the rhizospheric soil of Populus euphratica which is the dominant tree living in extreme arid regions in northwest China. Some strains with plant growth-promoting bacteria related metabolic characteristics were able to promote drought resistance in plants after inoculation. Ten strains with the greatest effects increased the dry weight of wheat shoots from 0.5 to 34.4 %, and the surface area of the root systems from 12.56 to 212.17 % compared to the control after drought treatment whereas no obvious promoting effect was observed in normal water conditions. These 10 strains were identified to be of the genera Pseudomonas, Bacillus, Stenotrophomonas and Serratia by 16S rRNA (rrs) gene sequence alignment. Among these strains, Serratia sp. 1-9 and Pseudomonas sp. 5-23 were the two most effective strains. Both of them produced auxin and the production increased significantly when cultured under simulated drought conditions which are inferred to be the most plausible mechanism for their plant growth-promoting effect under drought stress.

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Section: Introductionmentioning

confidence: 99%

Survey of Plant Drought-Resistance Promoting Bacteria from Populus euphratica Tree Living in Arid Area

Wang

Ouyang

et al. 2014

Indian J Microbiol

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“…Of these, drought is one of the most important stresses followed by salinity stress (Kinje 2006;Carmen and Roberto 2011). Extensive areas of land are affected by these two stresses and are reported to have maximum deleterious effects on the agricultural productivities (Oliveira et al 2013).…”

Section: Types Of Soil Stressesmentioning

confidence: 99%

“…(Upadhyay et al 2012), Azospirullum sp., and Pseudomonas sp. (Baniaghil et al 2013), are reported to enhance the production of these antioxidant enzymes responsible for ROS degradation/breakdown, thereby helping plants to ameliorate stress response and also growth promotion (Kohler et al 2009;Carmen and Roberto 2011).…”

Section: Antioxidative Enzymesmentioning

confidence: 99%

“…Plant also produces protective compounds or compatible osmolytes in response to stress conditions, mainly salt stress. Some of these compounds include amino acids, imino acids, amides, proteins, quaternary ammonium compounds, and polyamines (Carmen and Roberto 2011). Increased production of proline in response to stressors has been reported (Lalelou et al 2010;Marin et al 2010) which plays a role in osmo-adaptation in salt stress (Meloni et al 2001), and as a molecular chaperone it protects and stabilizes macromolecules like proteins during dehydration and also acts as a scavenger for hydroxyl radical, thus protecting from osmotic stress (Csonka 1989;Upadhyay et al 2012).…”

Section: Protective Compoundsmentioning

confidence: 99%

“…The effects of stresses on plants involve disrupted photosynthesis leading to leaf senescence, accumulation of excessive reactive oxygen species (ROS), nutrient deficiency, and destruction of cellular organelles and metabolism leading to decreased plant growth. The aftereffect includes both physiological and metabolically disturbed homeostasis of plant (Carmen and Roberto 2011;Oliveira et al 2013). Metal stress is another important soil stress, which is becoming increasingly intensive due to numerous anthropogenic factors (Glick 2010).…”

Section: Types Of Soil Stressesmentioning

confidence: 99%

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Microbial Consortium of Plant Growth-Promoting Rhizobacteria Improves the Performance of Plants Growing in Stressed Soils: An Overview

Panwar

Tewari²,

Nayyar³

2014

Phosphate Solubilizing Microorganisms

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Soil and associated stress conditions not only influence dwelling microbial populations and soil ecosystems but also affect growth and yield of plants. Major soil stress includes salinity, drought, and metal contamination. Due to burgeoning populations and expanding food demands, it has become imperative to alleviate the stressful soil conditions so that the crop production is increased and, consequently, the food demands are fulfilled. Different strategies are followed to resolve this problem, and one such approach involves exploiting microbial potential for plant's benefit. The multifunctional microscopic life-forms are already known for their applications in industries, medicine, and agricultural field. One of the major attributes of microbes from agronomic point of view is their ability to solubilize difficultly available forms of soil phosphorus. Phosphate-solubilizing microbes are also known to produce enzymes, siderophores, and growth hormones; embellish plant growth and biocontrol activity; and improve soil properties. Such microorganisms possessing attributes, beneficial for plants are termed as plant growth-promoting rhizobacteria (PGPR). There are plentiful reports on bacterialmediated plant growth promotion under nonstressed conditions although fewer reports are available on their effects under stressed condition. The bacterial ability to enhance tolerance of plants in stressed soils and the impact of PGPR consortium (mixture) on different crops are highlighted. The major idea here is to consolidate the fact that PGPR consortium can be used directly in stress-affected soil with an aim to refurbish soil conditions to foster crop productivity in stressed soils.

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