Mitigation of water scarcity with sustained growth of Rice by plant growth promoting bacteria DOI Creative Commons

Naima Mahreen,

Sumera Yasmin, Muhammad Asif

et al.

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Jan. 23, 2023

Climate change augments the risk to food security by inducing drought stress and a drastic decline in global rice production. Plant growth-promoting bacteria (PGPB) have been known improve plant growth under stress. Here present study, we isolated, identified, well-characterized eight drought-tolerant from rhizosphere that are tolerant 20% PEG-8000. These strains exhibited multiple traits, i.e., 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, exopolysaccharide production, phosphate (P)-solubilizing activity (51–356 µg ml -1 ), indole-3 acetic (IAA) production (14.3–46.2 of organic acids (72–178 ). Inoculation bacterial consortium ( Bacillus subtilis NM-2, Brucella haematophilum NM-4, cereus NM-6) significantly improved seedling vigor index (1009.2-1100) as compared non-inoculated stressed plants (630-957). Through rhizoscanning, efficiency was validated root parameters such length (17%), diameter, surface area (18%) all tested genotypes with respective treatments. Furthermore, response inoculation on three positively correlated ameliorating traits accumulation osmoprotectant, proline (85.8%–122%), relative water content (51%), membrane stability (64%), antioxidant enzymes reduce oxidative damage reactive oxygen species. A decrease temperature chlorophyll inoculated were found using infrared thermal imaging soil analyzer development (SPAD), respectively. The key supporting role toward responses robust techniques like an gas analyzer. principal component analysis depicts contribution yield integration genotype (NIBGE-DT02) potential strains, NM-6, can serve effective bioinoculant cope scarcity current alarming issues related fluctuating climate.

Language: Английский

Back to our roots: exploring the role of root morphology as a mediator of beneficial plant–microbe interactions DOI Creative Commons
Courtney Horn Herms, Rosanna C. Hennessy, Frederik Bak

et al.

Environmental Microbiology, Journal Year: 2022, Volume and Issue: 24(8), P. 3264 - 3272

Published: Feb. 2, 2022

Summary Plant breeding for belowground traits that have a positive impact on the rhizosphere microbiome is promising strategy to sustainably improve crop yields. Root architecture and morphology are understudied plant targets despite their potential significantly shape microbial community structure function in rhizosphere. In this review, we explore relationship between various root architectural morphological interactions, focusing of diameter while discussing biological ecological mechanisms underpinning process. addition, propose three future research avenues drive area an effort unravel effect microbiology. This knowledge will pave way new strategies can be exploited sustainable high‐yielding cultivars.

Language: Английский

Citations

99
Plant Growth-Promoting Rhizobacteria Eliminate the Effect of Drought Stress in Plants: A Review DOI Creative Commons

Hafiz Muhammad Ahmad,

Sajid Fiaz, Sumaira Hafeez

et al.

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: Aug. 11, 2022

Plants evolve diverse mechanisms to eliminate the drastic effect of biotic and abiotic stresses. Drought is most hazardous stress causing huge losses crop yield worldwide. Osmotic decreases relative water chlorophyll content increases accumulation osmolytes, epicuticular wax content, antioxidant enzymatic activities, reactive oxygen species, secondary metabolites, membrane lipid peroxidation, abscisic acid. Plant growth-promoting rhizobacteria (PGPR) drought by altering root morphology, regulating stress-responsive genes, producing phytohormones, siderophores, volatile organic compounds, exopolysaccharides, improving 1-aminocyclopropane-1-carboxylate deaminase activities. The use PGPR an alternative approach traditional breeding biotechnology for enhancing productivity. Hence, that can promote tolerance in important agricultural crops could be used minimize under limited conditions. This review deals with recent progress on harmful effects agriculture crops.

Language: Английский

Citations

93
Halotolerant Rhizobacteria for Salinity-Stress Mitigation: Diversity, Mechanisms and Molecular Approaches DOI Open Access

Alka Sagar,

Shalini Rai,

Noshin Ilyas

et al.

Sustainability, Journal Year: 2022, Volume and Issue: 14(1), P. 490 - 490

Published: Jan. 3, 2022

Agriculture is the best foundation for human livelihoods, and, in this respect, crop production has been forced to adopt sustainable farming practices. However, soil salinity severely affects growth, degradation of quality, and fertility many countries world. This results loss profitability, growth agricultural yields, step-by-step decline nutrient content. Thus, researchers have focused on searching halotolerant plant growth-promoting bacteria (PGPB) increase productivity. The beneficial are frequently connected with rhizosphere can alleviate under stress through direct or indirect mechanisms. In context, PGPB attained a unique position. responses include an increased rate photosynthesis, high antioxidants, osmolyte accumulation, decreased Na+ ions, maintenance water balance, germination rate, well-developed root shoot elongation salt-stress conditions. Therefore, use as bioformulations emerging research avenue last few years, applications biopesticides biofertilizers being considered alternative tools agriculture, they ecofriendly minimize all kinds stresses. Halotolerant possess greater potential salinity-affected bioinoculants bioremediation salt-affected soil.

Language: Английский

Citations

83
Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms DOI Creative Commons
Yue Wang, Mathiyazhagan Narayanan, Xiaojun Shi

et al.

Frontiers in Microbiology, Journal Year: 2022, Volume and Issue: 13

Published: Aug. 11, 2022

Heavy metal contamination in soils endangers humans and the biosphere by reducing agricultural yield negatively impacting ecosystem health. In recent decades, this issue has been addressed partially remedied through use of “green technology,” which employs metal-tolerant plants to clean up polluted soils. Furthermore, global climate change enhances negative effects climatic stressors (particularly drought, salinity, extreme temperatures), thus growth accumulation capacity remediating plants. Plant growth-promoting bacteria (PGPB) have widely introduced into improve productivity or efficiency phytoremediation metal-contaminated via various mechanisms, including nitrogen fixation, phosphate solubilization, phytohormone production, biological control. The plants, as well PGPB inoculants, should hasten process moving technology from laboratory field. Hence, it is critical understand how ameliorate environmental stress toxicity while also inducing plant tolerance, mechanisms involved such actions. This review attempts compile scientific evidence on topic, with a special emphasis mechanism bioremediation [plant promotion detoxification/(im)mobilization/bioaccumulation/transformation/translocation] deciphering combined (metal stresses) tolerance.

Language: Английский

Citations

77
Biopriming of seed with plant growth-promoting bacteria for improved germination and seedling growth DOI Creative Commons
Angelika Fiodor, Nur Ajijah, Łukasz Dziewit

et al.

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Feb. 28, 2023

Several seed priming methods can be used to improve germination, seedling vigor, and overcome abiotic stress. In addition these benefits, only the biopriming method provides additional benefit of biotic stress management, earning it special attention. Seed is useful in almost all crops around world an environmentally friendly alternative chemical fungicides. Biopriming usually refers use beneficial microorganisms, particular plant growth-promoting bacteria (PGPB) able survive under various harsh environmental conditions. this study, bacterial strains were isolated from samples different origins, i.e., rhizospheric soil, desert sand, sea mud. Preliminary screening 156 isolates was conducted on basis their potassium (K), phosphorus (P) solubilization ability, production growth hormone, indole acetic acid (IAA). The most efficient identified by 16S rRNA gene nucleotide sequences further examined for ACC deaminase activity, ammonia production, biocontrol activity (defined via chitinolytic HCN, siderophores production). Finally, carrot germination assay with 10 shortlisted potent isolates. 68.6, 58.3, 66.7% tested capable P, K, Zn solubilization, respectively. Klebsiella aerogenes AF3II1 showed highest P K while isolate AF4II5, AF7II3, PC3 IAA synthesis ability. Serratia plymuthica EDC15 Pseudomonas putida AF1I1 strongest siderophore Seven demonstrated strong HCN Five improved germination. Only selected properties results study demonstrate that mainly auxins are involved Furthermore, data suggest phosphate ability may play role

Language: Английский

Citations

69
Plant Growth-Promoting Rhizobacteria (PGPR): A Rampart against the Adverse Effects of Drought Stress DOI Open Access

Naoual Bouremani,

Hafsa Cherif‐Silini, Allaoua Silini

et al.

Water, Journal Year: 2023, Volume and Issue: 15(3), P. 418 - 418

Published: Jan. 19, 2023

Abiotic stress significantly limits plant growth and production. Drought, in particular, is a severe constraint that affects agricultural productivity on global scale. Water induces plants set of morpho-anatomical (modification root leaf structure), physiological, biochemical (relative water content, membrane stability, photosynthesis, hormonal balance, antioxidant systems, osmolyte accumulation) changes mainly employed to cope with the drought stress. These strategies allow overcome unfavorable period limited availability. Currently, promising alternative available improve tolerance under conditions. The use osmotolerant growth-promoting rhizobacteria (PGPR) as inoculants can alleviate by increasing efficiency plant. PGPR drought, through morphology architecture system, production phytohormones, extracellular polysaccharides, ACC 1-(aminocyclopropane-1-carboxylate) deaminase, volatile chemicals, accumulation. They may also enhance defense system induce transcriptional regulation response genes. This review addresses effects growth, adaptation, conditions discusses significant potential modulate physiological against scarcity, ensuring survival improving resistance crops.

Language: Английский

Citations

67
Role of microbial inoculants as bio fertilizers for improving crop productivity: A review DOI Creative Commons
Durre Shahwar,

Zeenat Mushtaq,

Humira Mushtaq

et al.

Heliyon, Journal Year: 2023, Volume and Issue: 9(6), P. e16134 - e16134

Published: May 17, 2023

The world's population is increasing and anticipated to spread 10 billion by 2050, the issue of food security becoming a global concern. To maintain security, it essential increase crop productivity under changing climatic conditions. Conventional agricultural practices frequently use artificial/chemical fertilizers enhance productivity, but these have numerous negative effects on environment people's health. address issues, researchers been concentrating substitute fertilization methods for many years, biofertilizers as crucial part are quickly gaining popularity all over globe. Biofertilizers living formulations made indigenous plant growth-promoting rhizobacteria (PGPR) which substantial, environment-friendly, economical amassing enhancing development either directly or indirectly, renewable source nutrients sustainable agronomy. review aims provide comprehensive overview current knowledge microbial inoculants biofertilizers, including their types, mechanisms action, challenges, limitations associated with inoculants. In this review, we focused application fields in growth performing several activities like nitrogen fixation, siderophore production, phytohormone nutrient solubilization, facilitating easy uptake plants. Further, discussed indirect mechanism PGPRs, developing induced system resistance against pest diseases, biocontrol agent phytopathogens. This article presents brief outline ideas uses improving well discussion challenges

Language: Английский

Citations

67
Impact of plant growth-promoting rhizobacteria (PGPR) on plant nutrition and root characteristics: Current perspective DOI Creative Commons
Muneer Ahmed Khoso, Sindho Wagan, Intikhab Álam

et al.

Plant Stress, Journal Year: 2023, Volume and Issue: 11, P. 100341 - 100341

Published: Dec. 28, 2023

Through a variety of mechanisms, including increasing the amount readily available mineral nutrients, regulating phytohormone levels, and biocontrol phytopathogens, plant growth-promoting rhizobacteria (PGPR) associated with rhizosphere either directly or indirectly stimulates growth development. The establishment, survival, persistence PGPR inoculants are widely acknowledged to be contingent upon these two parameters, in addition intricate network interactions within rhizosphere. In general, soil is moist environment significant amounts carbon that have been degraded harbors large population microbes. rhizo-microbiome crucial agriculture because wide root exudates cell debris attract unique distinct patterns microbial colonization. plays role manufacture regulation extracellular molecules, hormones, secondary metabolites, antibiotics, various signaling chemicals. Additionally, composition influences texture enhancement. Research has shown can used treat plants inoculate promote alters physiology entire plant, which enhances nutrient uptake affects effectiveness activity. specific biochemical processes involved this phenomenon often not well understood. Nevertheless, new studies shed light on mechanisms via by induce responses, both at local systemic levels. Insufficient information regarding impact mechanism molecules metabolic pathways characteristics. Consequently, review will concentrate elucidating identifying essential exert influence root-microbe interactions.

Language: Английский

Citations

65
Mesorhizobium improves chickpea growth under chromium stress and alleviates chromium contamination of soil DOI
Huma Naz, R. Z. Sayyed, Riyaj Uddin Khan

et al.

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 338, P. 117779 - 117779

Published: April 4, 2023

Language: Английский

Citations

53
Recent advances in PGPR-mediated resilience toward interactive effects of drought and salt stress in plants DOI Creative Commons
Ahmad Alturki, M. Murali,

Ayman F. Omar

et al.

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Sept. 27, 2023

The present crisis at hand revolves around the need to enhance plant resilience various environmental stresses, including abiotic and biotic ensure sustainable agriculture mitigate impact of climate change on crop production. One such promising approach is utilization growth-promoting rhizobacteria (PGPR) mediate these stresses. Plants are constantly exposed stress factors, as drought, salinity, pathogens, nutrient deficiencies, which can significantly reduce yield quality. PGPR beneficial microbes that reside in rhizosphere plants have been shown positively influence growth tolerance through mechanisms, solubilization, phytohormone production, induction systemic resistance. review comprehensively examines mechanisms promotes resilience, acquisition, hormonal regulation, defense induction, focusing recent research findings. advancements made field PGPR-mediated multi-omics approaches ( viz. , genomics, transcriptomics, proteomics, metabolomics) unravel intricate interactions between discussed their molecular pathways involved tolerance. Besides, also emphasizes importance continued implementation PGPR-based strategies address pressing challenges facing global food security commercialization bio-formulations for agricultural.

Language: Английский

Citations

52