scholarly journals Role of Bacillus aryabhattai in plant growth and development

2019 ◽  
Vol 39 (1) ◽  
Author(s):  
Ibomcha Ngangom ◽  
M. M. Nisha ◽  
S. Santhosh Kumar ◽  
K. V. Ravindra ◽  
Leela Tewari ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Immunity ◽  
Acc Deaminase ◽  
Signalling Molecules ◽  
Bacillus Aryabhattai ◽  
Optimal Functioning ◽  
Wide Range ◽  
Indole 3 Acetic Acid ◽  
Lower Plant

Plants produce a wide range of organic compounds like sugars, organic acids and vitamins, which can be used as nutrients or signals by microbial populations. On the other hand, microorganisms release phytohormones, enzymes, which may act directly or indirectly to activate plant immunity and regulate plant growth. Plant signalling molecules such as auxin and cytokinin can be produced by microorganisms to colonize efficiently with roots and enhance root activity. The isolated microbe Bacillus aryabhattai, has the ability to produce1-aminocyclopropane-1-carboxylate (ACC) deaminase to lower plant ethylene level, often a result of various stresses, and is found to be a key component in the efficacious functioning of this bacterium. The optimal functioning of this bacterium includes the synergistic interaction between ACC deaminase, and plant with bacterial indole-3-acetic acid (IAA).

scholarly journals Alleviation of Salt Stress in Wheat Seedlings via Multifunctional Bacillus aryabhattai PM34: An In-Vitro Study

2021 ◽  
Vol 13 (14) ◽  
pp. 8030
Author(s):  
Shehzad Mehmood ◽  
Amir Abdullah Khan ◽  
Fuchen Shi ◽  
Muhammad Tahir ◽  
Tariq Sultan ◽  
...  
Keyword(s):  
Salt Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Bacterial Strain ◽  
Acc Deaminase ◽  
Wheat Growth ◽  
Wheat Seedlings ◽  
Pgp Traits ◽  
Bacillus Aryabhattai

Plant growth-promoting rhizobacteria play a substantial role in plant growth and development under biotic and abiotic stress conditions. However, understanding about the functional role of rhizobacterial strains for wheat growth under salt stress remains largely unknown. Here we investigated the antagonistic bacterial strain Bacillus aryabhattai PM34 inhabiting ACC deaminase and exopolysaccharide producing ability to ameliorate salinity stress in wheat seedlings under in vitro conditions. The strain PM34 was isolated from the potato rhizosphere and screened for different PGP traits comprising nitrogen fixation, potassium, zinc solubilization, indole acetic acid, siderophore, and ammonia production, along with various extracellular enzyme activities. The strain PM34 showed significant tolerance towards both abiotic stresses including salt stress (NaCl 2 M), heavy metal (nickel, 100 ppm, and cadmium, 300 ppm), heat stress (60 °C), and biotic stress through mycelial inhibition of Rhizoctonia solani (43%) and Fusarium solani (41%). The PCR detection of ituC, nifH, and acds genes coding for iturin, nitrogenase, and ACC deaminase enzyme indicated the potential of strain PM34 for plant growth promotion and stress tolerance. In the in vitro experiment, NaCl (2 M) decreased the wheat growth while the inoculation of strain PM34 enhanced the germination% (48%), root length (76%), shoot length (75%), fresh biomass (79%), and dry biomass (87%) over to un-inoculated control under 2M NaCl level. The results of experiments depicted the ability of antagonistic bacterial strain Bacillus aryabhattai PM34 to augment salt stress tolerance when inoculated to wheat plants under saline environment.

scholarly journals Complete Genome Sequence of the Rhizobacterium Pseudomonas trivialis Strain IHBB745 with Multiple Plant Growth-Promoting Activities and Tolerance to Desiccation and Alkalinity

2015 ◽  
Vol 3 (5) ◽  
Author(s):  
Arvind Gulati ◽  
Mohit Kumar Swarnkar ◽  
Pratibha Vyas ◽  
Praveen Rahi ◽  
Rishu Thakur ◽  
...  
Keyword(s):  
Plant Growth ◽  
Genome Sequence ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Acc Deaminase ◽  
Gene Coding ◽  
Plant Growth Promoting Activities ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Indole 3 Acetic Acid

The complete genome sequence of 6.45 Mb is reported here for Pseudomonas trivialis strain IHBB745 (MTCC 5336), which is an efficient, stress-tolerant, and broad-spectrum plant growth-promoting rhizobacterium. The gene-coding clusters predicted the genes for phosphate solubilization, siderophore production, 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity, indole-3-acetic acid (IAA) production, and stress response.

scholarly journals Plant Growth Promotion Driven by a Novel Caulobacter Strain

2019 ◽  
Vol 32 (9) ◽  
pp. 1162-1174 ◽  
Author(s):  
Dexian Luo ◽  
Sarah Langendries ◽  
Sonia Garcia Mendez ◽  
Joren De Ryck ◽  
Derui Liu ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Promotion ◽  
Soil Microbial Communities ◽  
Leaf Size ◽  
Bacterial Strains ◽  
Soil Microbial ◽  
Wide Range ◽  
Plant Growth Promoting ◽  
Taxonomic Groups

Soil microbial communities hold great potential for sustainable and ecologically compatible agriculture. Although numerous plant-beneficial bacterial strains from a wide range of taxonomic groups have been reported, very little evidence is available on the plant-beneficial role of bacteria from the genus Caulobacter. Here, the mode of action of a Caulobacter strain, designated RHG1, which had originally been identified through a microbial screen for plant growth-promoting (PGP) bacteria in maize (Zea mays), is investigated in Arabidopsis thaliana. RHG1 colonized both roots and shoots of Arabidopsis, promoted lateral root formation in the root, and increased leaf number and leaf size in the shoot. The genome of RHG1 was sequenced and was utilized to look for PGP factors. Our data revealed that the bacterial production of nitric oxide, auxins, cytokinins, or 1-aminocyclopropane-1-carboxylate deaminase as PGP factors could be excluded. However, the analysis of brassinosteroid mutants suggests that an unknown PGP mechanism is involved that impinges directly or indirectly on the pathway of this growth hormone.

scholarly journals Plants Saline Environment in Perception with Rhizosphere Bacteria Containing 1-Aminocyclopropane-1-Carboxylate Deaminase

2021 ◽  
Vol 22 (21) ◽  
pp. 11461
Author(s):  
Dhanashree Vijayrao Bomle ◽  
Asha Kiran ◽  
Jeevitha Kodihalli Kumar ◽  
Lavanya Senapathyhalli Nagaraj ◽  
Chamanahalli Kyathegowda Pradeep ◽  
...  
Keyword(s):  
Plant Growth ◽  
Salinity Stress ◽  
Crop Yields ◽  
Agricultural Practices ◽  
Acc Deaminase ◽  
Plant Growth Promoting Rhizobacteria ◽  
Difficult Situation ◽  
Wide Range ◽  
The Impact ◽  
Seed Biopriming

Soil salinity stress has become a serious roadblock for food production worldwide since it is one of the key factors affecting agricultural productivity. Salinity and drought are predicted to cause considerable loss of crops. To deal with this difficult situation, a variety of strategies have been developed, including plant breeding, plant genetic engineering, and a wide range of agricultural practices, including the use of plant growth-promoting rhizobacteria (PGPR) and seed biopriming techniques, to improve the plants’ defenses against salinity stress, resulting in higher crop yields to meet future human food demand. In the present review, we updated and discussed the negative effects of salinity stress on plant morphological parameters and physio-biochemical attributes via various mechanisms and the beneficial roles of PGPR with 1-Aminocyclopropane-1-Carboxylate(ACC) deaminase activity as green bio-inoculants in reducing the impact of saline conditions. Furthermore, the applications of ACC deaminase-producing PGPR as a beneficial tool in seed biopriming techniques are updated and explored. This strategy shows promise in boosting quick seed germination, seedling vigor and plant growth uniformity. In addition, the contentious findings of the variation of antioxidants and osmolytes in ACC deaminase-producing PGPR treated plants are examined.

scholarly journals Living Proof of Activity of Extracellular Vesicles in the Central Nervous System

2021 ◽  
Vol 22 (14) ◽  
pp. 7294
Author(s):  
Shadi Mahjoum ◽  
David Rufino-Ramos ◽  
Luís Pereira de Almeida ◽  
Marike L. D. Broekman ◽  
Xandra O. Breakefield ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Extracellular Vesicles ◽  
Optimal Functioning ◽  
Wide Range ◽  
The Central Nervous System ◽  
Rna And Dna

The central nervous system (CNS) consists of a heterogeneous population of cells with highly specialized functions. For optimal functioning of the CNS, in disease and in health, intricate communication between these cells is vital. One important mechanism of cellular communication is the release and uptake of extracellular vesicles (EVs). EVs are membrane enclosed particles actively released by cells, containing a wide array of proteins, lipids, RNA, and DNA. These EVs can be taken up by neighboring or distant cells, and influence a wide range of processes. Due to the complexity and relative inaccessibility of the CNS, our current understanding of the role of EVs is mainly derived in vitro work. However, recently new methods and techniques have opened the ability to study the role of EVs in the CNS in vivo. In this review, we discuss the current developments in our understanding of the role of EVs in the CNS in vivo.

scholarly journals Plant growth-promoting rhizobacteria associated to candelilla rhizosphere (Euphorbia antisyphilitica) and its effects on Arabidopsis thaliana seedlings

2021 ◽  
Vol 49 (2) ◽  
pp. 12294
Author(s):  
Maria T. SALAZAR-RAMÍREZ ◽  
Jorge SÁENZ-MATA ◽  
Pablo PRECIADO-RANGEL ◽  
Manuel FORTIS-HERNÁNDEZ ◽  
Edgar O. RUEDA-PUENTE ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Acetic Acid ◽  
Plant Growth ◽  
Acc Deaminase ◽  
Plant Growth Promoting Rhizobacteria ◽  
Growth Promoters ◽  
Biochemical Tests ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Indole 3 Acetic Acid

In the communities of Sierra Mojada and Viesca, Coahuila, Mexico of Coahuila desert, two rhizosphere samplings of candelilla (Euphorbia antisyphilitica Zucc) were collected to isolate, characterize, and identifying plant growth-promoting rhizobacteria (PGPR); 165 rhizobacteria were tested in vitro with Arabidopsis thaliana seedlings to evaluate their potential as plant growth promoters, and obtaining 21 strains with best results in the variables of the number of secondary roots and fresh weight concerning the uninoculated control. Their salinity tolerance was evaluated at concentrations from 0.85 M, 1.7 M and 2.55 M of NaCl. Biochemical tests were accomplishing such as siderophores production, phosphates solubilization, production of Indole-3-acetic acid (IAA), and the activity of the ACC deaminase enzyme. The results obtained from 21 strains selected, high activities were obtained in organic substances like a siderophores since they developed a translucent orange halo around their growth; four rhizobacteria developed a clear halo around the bacterial growth with a thickness between 1.487 mm ± 0.667 mm and 5.267 mm ± 0.704 mm in phosphates solubilization; in the production of Indole-3-acetic acid (IAA), the bacterial strains showed the presence of this phytohormone, with values ​​from 4.444 μg mL-1 to 19.286 μg mL-1; and according to the activity of the ACC deaminase enzyme, values ​​from 0.424 to 1.306 µmol α-KB/h/mg Pr were showed. 16S rRNA sequencing was carried out and genus identified were Bacillus, Staphylococcus, Acinetobacter, Cronobacter and Siccibacter. The results obtained show the potential of the isolated rhizobacteria as growth promoters and the increase in the biomass of the Arabidopsis thaliana seedlings is evident. This is a first indication to proceed to carry out tests in different phenological stages in crops of agricultural importance.

scholarly journals Plant Growth-Promoting Endophytic Bacillus Aryabhattai Triggers Novel Genes to Induce Plant Growth

2021 ◽  
Author(s):  
Hongli Xu ◽  
Jingyao Gao ◽  
Roxana Portieles ◽  
Lihua Du ◽  
Xiangyou Gao ◽  
...  
Keyword(s):  
Plant Growth ◽  
Cinnamyl Alcohol Dehydrogenase ◽  
Endophytic Bacterium ◽  
Arginine Decarboxylase ◽  
Gamma Chain ◽  
Bacillus Aryabhattai ◽  
Wide Range ◽  
Transcriptional Changes ◽  
Promote Plant Growth ◽  
Bacterial Genes

Abstract Background: In nature, plants interact with a wide range of microorganisms. Most of these microorganisms have the ability to promote plant growth through the induction of important molecular pathways. The current work evaluated whether the endophytic bacterium Bacillus aryabhattai encourages plant growth and how transcriptional changes might be implicated in this effect.Results: The endophytic bacterium showed a significant effect on plant growth. Our results revealed that B. aryabhattai promotes the growth of Arabidopsis and tobacco plants. Notably, transcriptional changes in Arabidopsis plants treated with the bacterium were identified. Genes such as cinnamyl alcohol dehydrogenase, apyrase, thioredoxin H8, benzaldehyde dehydrogenase, indoleacetaldoxime dehydratase, berberine bridge enzyme-like and gibberellin-regulated protein were highly expressed. Additionally, endophytic bacterial genes such as arginine decarboxylase, D-hydantoinase, ATP synthase gamma chain and 2-hydroxyhexa-2,4-dienoate hydratase were activated during the interaction with Arabidopsis.Conclusions: The results show that new plant growth-related genes are induced during the interaction endophytic bacterium B. aryabhattai, and these changes may promote plant growth in sustainable agriculture.

scholarly journals GH3 Auxin-Amido Synthetases Alter the Ratio of Indole-3-Acetic Acid and Phenylacetic Acid in Arabidopsis

2019 ◽  
Vol 61 (3) ◽  
pp. 596-605 ◽  
Author(s):  
Yuki Aoi ◽  
Keita Tanaka ◽  
Sam David Cook ◽  
Ken-Ichiro Hayashi ◽  
Hiroyuki Kasahara
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Growth And Development ◽  
Phenylacetic Acid ◽  
Wild Type ◽  
Plant Growth And Development ◽  
Polar Movement ◽  
Wide Range ◽  
Metabolite Quantification ◽  
Indole 3 Acetic Acid

Abstract Auxin is the first discovered plant hormone and is essential for many aspects of plant growth and development. Indole-3-acetic acid (IAA) is the main auxin and plays pivotal roles in intercellular communication through polar auxin transport. Phenylacetic acid (PAA) is another natural auxin that does not show polar movement. Although a wide range of species have been shown to produce PAA, its biosynthesis, inactivation and physiological significance in plants are largely unknown. In this study, we demonstrate that overexpression of the CYP79A2 gene, which is involved in benzylglucosinolate synthesis, remarkably increased the levels of PAA and enhanced lateral root formation in Arabidopsis. This coincided with a significant reduction in the levels of IAA. The results from auxin metabolite quantification suggest that the PAA-dependent induction of GRETCHEN HAGEN 3 (GH3) genes, which encode auxin-amido synthetases, promote the inactivation of IAA. Similarly, an increase in IAA synthesis, via the indole-3-acetaldoxime pathway, significantly reduced the levels of PAA. The same adjustment of IAA and PAA levels was also observed by applying each auxin to wild-type plants. These results show that GH3 auxin-amido synthetases can alter the ratio of IAA and PAA in plant growth and development.

scholarly journals Role of strigolactones: Signalling and crosstalk with other phytohormones

2020 ◽  
Vol 15 (1) ◽  
pp. 217-228
Author(s):  
Mohammad Faizan ◽  
Ahmad Faraz ◽  
Fareen Sami ◽  
Husna Siddiqui ◽  
Mohammad Yusuf ◽  
...  
Keyword(s):  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Growth And Development ◽  
Plant Architecture ◽  
Abiotic Factors ◽  
Arbuscular Mycorrhizal ◽  
Plant Growth And Development ◽  
Wide Range ◽  
Physiological Reactions

AbstractPlant hormones play important roles in controlling how plants grow and develop. While metabolism provides the energy needed for plant survival, hormones regulate the pace of plant growth. Strigolactones (SLs) were recently defined as new phytohormones that regulate plant metabolism and, in turn, plant growth and development. This group of phytohormones is derived from carotenoids and has been implicated in a wide range of physiological functions including regulation of plant architecture (inhibition of bud outgrowth and shoot branching), photomorphogenesis, seed germination, nodulation, and physiological reactions to abiotic factors. SLs also induce hyphal branching in germinating spores of arbuscular mycorrhizal fungi (AMF), a process that is important for initiating the connection between host plant roots and AMF. This review outlines the physiological roles of SLs and discusses the significance of interactions between SLs and other phytohormones to plant metabolic responses.

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