The PGPR Mechanisms of Salt Stress Adaptation and Plant Growth Promotion

Shultana, Rakiba; Zuan, Ali Tan Kee; Naher, Umme Aminun; Islam, A. K. M. Mominul; Rana, Md. Masud; Rashid, H.; Irin, Israt Jahan; Islam, Saiful; Rim, Adiba Afrin; Hasan, Ahmed Khairul

doi:10.3390/agronomy12102266

Cited by 50 publications

(20 citation statements)

References 141 publications

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“…This indicates that rhizobacteria from saline soil have a better ability to promote plant growth. The results of previous studies also showed that rhizobacteria from saline soils were better able to increase plant growth [11].…”

Section: Discussionmentioning

confidence: 82%

Seed biopriming using saline soil rhizobacteria from the coast of Kolaka Regency for enhancing seed viability and vigor of tomato (Lycopersicum esculentum L.)

Sutariati,

Bahrun,

Khaeruni

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The research was conducted to identify indigenous rhizobacteria that can be useful as growth promoters and adapted to saline soils. The isolate was isolated from saline soil rhizosphere on the coast in Kolaka district. The research was conducted in the Lab of Agronomy, on Agricultural Faculty in Halu Oleo University. The research carry out from April to September 2022. The study arranged in a completely randomized design (CRD) using of 15 test isolates. The test was carried out using a seed biopriming technique, then the seeds were germinated using a standard germination procedure. The results showed that all tested rhizobacterial isolates increase the viability and vigor of tomato seeds. There was an increase in maximum growth potential, seed germination, vigor index, and relative growth rate of seeds in the range of 85% to 89% when compared to control. There were 3 isolates of rhizobacteria which were more capable of reducing T50 and increasing seed germination of tomato seeds, namely KL6, KL10 and KL14 isolates. Further research is still needed to test the effectiveness of this isolate to increase tomato growth and yield under conditions of salinity stress in the field.

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Section: Discussionmentioning

confidence: 82%

Seed biopriming using saline soil rhizobacteria from the coast of Kolaka Regency for enhancing seed viability and vigor of tomato (Lycopersicum esculentum L.)

Sutariati,

Bahrun,

Khaeruni

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The highest number of nodules plant 1 was observed in S. rostrata followed by S. aculeate (Irin and Biswas, 2021a) and plant growth promoting rhizobacteria (PGPR) are potential bioinoculants to enhance crop productivity in saline agriculture (Shultana et al, 2022). The free-living and symbiotic bacteria in nature can fix atmospheric N2 in salt stress conditions and contribute to plant growth (Sultana et al, 2022).…”

Section: Green Manure For Reclamation Of Salinitymentioning

confidence: 99%

Green manure for soil salinity reclamation- A comprehensive review

IJ¹,

MN²,

Hannan³

et al. 2022

JAFE

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Large areas of the world are affected by high levels of soil salinity.Global warming causes a rapid rise of the sea level and enhancing new salt-affected areas inundating new agricultural land through saltwater intrusion. Salinity management through breeding strategies, land management or organic amendment could be wise strategies for salt management. Exogenous application of legumes as green manure can potentially reduce negative effects of soil salinity through growth improvement, ionic homeostasis via enhancing Ca/Na ratio in soil, adding organic matter, over expressing SOD, POD, CAT, APX, and lessening membrane leakage that upsurge crop productivity in saline environments. Such contribution to the sustainable agricultural systems is considered an alternate way towards enhancing crop cultivation in saline ecosystems. This review focused on the mechanisms of green manuring crops in soil salinity reclamation and subsequent contribution on crop growth and development.

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“…In recent years, there has been increased interest in studying VOCs released by PGPR [ 19 , 20 , 21 , 22 , 23 , 24 ]. Many types of soil bacteria can emit mVOCs, although the type and quantity of the compounds released may differ between species and culture conditions [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Antifungal Activity and Alleviation of Salt Stress by Volatile Organic Compounds of Native Pseudomonas Obtained from Mentha piperita

Gil

Cappellari

Giordano

et al. 2023

Plants

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As salt stress has a negative impact on plant growth and crop yield, it is very important to identify and develop any available biotechnology which can improve the salt tolerance of plants. Inoculation with plant-growth-promoting rhizobacteria (PGPR) is a proven environmentally friendly biotechnological resource for increasing the salt stress tolerance of plants and has a potential in-field application. In addition, bacterial volatile organic compounds (mVOCs) are signal molecules that may have beneficial roles in the soil–plant–microbiome ecosystem. We investigated the effects of mVOCs emitted by Pseudomona putida SJ46 and SJ04 on Mentha piperita grown under different levels of NaCl stress by evaluating their growth-promoting potential and capacity to increase salt tolerance effects. Furthermore, we evaluated under control and salt stress conditions the biocontrol ability of VOCs emitted by both these strains to inhibit the growth of Alternaria alternata and Sclerotium rolfsii. The VOCs emitted by both strains under control conditions did not lead to an significant improvement in peppermint growth. However, under salt stress conditions (75 or 100 mM NaCl), an amelioration of its physiological status was observed, with this effect being greater at 100 mM NaCl. This led to an enhancement of the number of leaves and nodes and, increased the shoot fresh and root dry weight by approximately twice in relation to control stressed plants. Moreover, the VOCs released by the two bacteria grown in control or saline media showed a significant reduction in the mycelial growth of A. alternata. In contrast, S. rolfsii growth was reduced 40% by the mVOCs released only under control conditions, with no effects being observed under salt stress. We also explored the composition of the bacterial volatile profiles by means of a solid-phase microextraction/gas chromatography–mass spectrometry (SPME/GC–MS) analysis. From the headspace of SJ46, three VOCs were identified: n-octanol, decane and tetradecane. The emission of SJ04 had the same chromatographic profile, with the addition of two more compounds: 1-(N-phenyl carbamyl)-2-morpholino cyclohexene and tridecane. Only compounds that were not present in the headspace of the control groups were recorded. The salt stress conditions where the bacteria were grown did not qualitatively modify the mVOC emissions. Taken together, our results suggest that plant-associated rhizobacterial VOCs play a potentially important role in modulating plant salt tolerance and reducing fungal growth. Thus, biological resources represent novel tools for counteracting the deleterious effects of salt stress and have the potential to be exploited in sustainable agriculture. Nevertheless, future studies are necessary to investigate technological improvements for bacterial VOC application under greenhouse and open field conditions.

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The PGPR Mechanisms of Salt Stress Adaptation and Plant Growth Promotion

Cited by 50 publications

References 141 publications

Seed biopriming using saline soil rhizobacteria from the coast of Kolaka Regency for enhancing seed viability and vigor of tomato (Lycopersicum esculentum L.)

Seed biopriming using saline soil rhizobacteria from the coast of Kolaka Regency for enhancing seed viability and vigor of tomato (Lycopersicum esculentum L.)

Green manure for soil salinity reclamation- A comprehensive review

Antifungal Activity and Alleviation of Salt Stress by Volatile Organic Compounds of Native Pseudomonas Obtained from Mentha piperita

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