Read by QxMD icon Read


Beatrice Berger, Susanne Baldermann, Silke Ruppel
BACKGROUND: Production and the quality of tomato fruits have a strong economic relevance. Microorganisms such as the plant growth-promoting bacteria Kosakonia radicincitans (DSM 16656) were demonstrated to improve shoot and root growth of young tomato plants, but data on yield increase and fruit quality by K. radicincitans are lacking. RESULTS: Here, we investigated how K. radicincitans affects tomato fruits. After inoculating tomato seeds with K. radicincitans or a sodium chloride buffer control solution, we monitored stalk length, first flowering and the amount of ripened fruits produced by inoculated and non-inoculated plants over a period of 21 weeks...
April 6, 2017: Journal of the Science of Food and Agriculture
Mayara S T Souza, Valter A de Baura, Sandra A Santos, Paulo Ivan Fernandes-Júnior, Fábio B Reis Junior, Maria Rita Marques, Gecele Matos Paggi, Marivaine da Silva Brasil
A sustainable alternative to improve yield and the nutritive value of forage is the use of plant growth-promoting bacteria (PGPB) that release nutrients, synthesize plant hormones and protect against phytopathogens (among other mechanisms). Azospirillum genus is considered an important PGPB, due to the beneficial effects observed when inoculated in several plants. The aim of this study was to evaluate the diversity of new Azospirillum isolates and select bacteria according to the plant growth promotion ability in three forage species from the Brazilian Pantanal floodplain: Axonopus purpusii, Hymenachne amplexicaulis and Mesosetum chaseae...
April 2017: World Journal of Microbiology & Biotechnology
Chairat Treesubsuntorn, Phattara Boraphech, Paitip Thiravetyan
Trimethylamine (TMA) contamination produces a strong "fishy" odor and can cause pathological changes in humans. By screening native microorganisms from Sansevieria kirkii exposed to 100 ppm TMA, it was shown that endophytic bacteria number 1 (EN1) and number 2 (EN2) have a higher TMA tolerance and removal capacity than other bacteria species in a closed system. In addition, EN1 and EN2 demonstrated the ability to produce high quantities of indole-3-acetic acid (IAA) and use 1-aminocyclopropane-1-carboxylic acid (ACC), which is found normally in plant growth-promoting bacteria (PGPB)...
March 3, 2017: Environmental Science and Pollution Research International
Érica B Felestrino, Iara F Santiago, Luana da Silva Freitas, Luiz H Rosa, Sérvio P Ribeiro, Leandro M Moreira
Soil is a habitat where plant roots and microorganisms interact. In the region of the Brazilian Iron Quadrangle (IQ), studies involving the interaction between microbiota and plants have been neglected. Even more neglected are the studies involving the holoparasite plant Langsdorffia hypogaea Mart. (Balanophoraceae). The geomorphological peculiarities of IQ soil, rich in iron ore, as well as the model of interaction between L. hypogaea, its hosts and the soil provide a unique niche that acts as selective pressure to the evolution of plant growth-promoting bacteria (PGPB)...
2017: Frontiers in Microbiology
Edgar Amavizca, Yoav Bashan, Choong-Min Ryu, Mohamed A Farag, Brad M Bebout, Luz E de-Bashan
Remote effects (occurring without physical contact) of two plant growth-promoting bacteria (PGPB) Azospirillum brasilense Cd and Bacilus pumilus ES4 on growth of the green microalga Chlorella sorokiniana UTEX 2714 were studied. The two PGPB remotely enhanced the growth of the microalga, up to six-fold, and its cell volume by about three-fold. In addition to phenotypic changes, both bacteria remotely induced increases in the amounts of total lipids, total carbohydrates, and chlorophyll a in the cells of the microalga, indicating an alteration of the microalga's physiology...
February 1, 2017: Scientific Reports
Shakeel Ahmad, Muhammad Imran, Sabir Hussain, Sajid Mahmood, Azhar Hussain, Muhammad Hasnain
BACKGROUND: The fertilizer use efficiency (FUE) of agricultural crops is generally low which results in poor crop yields and low economic benefits to the farmers. Among the various approaches used to enhance FUE, impregnation of mineral fertilizers with plant growth promoting bacteria (PGPB) is attracting a worldwide attention. The present study was aimed to improve growth, yield and nutrient use efficiency of wheat by bacterially impregnated mineral fertilizers. RESULTS: Results of the pot study revealed that impregnation of diammonium phosphate (DAP) and urea with PGPB was helpful in enhancing the growth, yield, photosynthetic rate, nitrogen use efficiency (NUE) and phosphorus use efficiency (PUE) of wheat...
January 20, 2017: Journal of the Science of Food and Agriculture
Zohreh Heydarian, Min Yu, Margaret Gruber, Bernard R Glick, Rong Zhou, Dwayne D Hegedus
Camelina sativa (camelina) is an oilseed crop touted for use on marginal lands; however, it is no more tolerant of soil salinity than traditional crops, such as canola. Plant growth-promoting bacteria (PGPB) that produce 1-aminocyclopropane-1-carboxylate deaminase (ACC deaminase) facilitate plant growth in the presence of abiotic stresses by reducing stress ethylene. Rhizospheric and endophytic PGPB and the corresponding acdS- mutants of the latter were examined for their ability to enhance tolerance to salt in camelina...
2016: Frontiers in Microbiology
X Yu, Y Li, Y Cui, R Liu, Y Li, Q Chen, Y Gu, K Zhao, Q Xiang, K Xu, X Zhang
AIMS: To analyse whether some indoleacetic acid (IAA)-secreting plant growth-promoting bacteria can alleviate cadmium (Cd) stress, the role of an Ochrobactrum sp. MGJ11 from rhizosphere of soybean in promoting plant growth, and to evaluate the counteracting Cd effects on soybean. METHODS AND RESULTS: Ochrobactrum sp. MGJ11 produced 121·2 mg l(-1) of IAA. MGJ11 increased soybean root length, shoot length and biomass by 30·1, 30·8 and 13·4% respectively. In liquid medium, no IAA production was detected in Cd concentration of 100 mg l(-1) ...
April 2017: Journal of Applied Microbiology
Xiao Chen, Xiaoyan Liu, Xinying Zhang, Liya Cao, Xiaoxin Hu
At present, few reveal the mechanism of inoculation plants with PGPB to remediate PAH-metal co-contaminated soil by analyzing the chemical speciations of contaminants. This study investigated the influence of inoculation plants with PGPB on different fractions of pyrene and Ni in rhizospheric and non-rhizospheric soil. The results demonstrated that the addition of PGPB brought the extensive increase of FDA activities in pyrene-Ni co-contaminated soil. PGPB increased the resistance of plants in nickel and pyrene-Ni contaminated soil, but decreased the plant biomass in single pyrene contaminated soil...
March 5, 2017: Journal of Hazardous Materials
Abdala Gamby Diedhiou, Fatou Kine Mbaye, Daouda Mbodj, Mathieu Ndigue Faye, Sarah Pignoly, Ibrahima Ndoye, Koffi Djaman, Souleymane Gaye, Aboubacry Kane, Laurent Laplaze, Baboucarr Manneh, Antony Champion
The overuse of agricultural chemicals such as fertilizer and pesticides aimed at increasing crop yield results in environmental damage, particularly in the Sahelian zone where soils are fragile. Crop inoculation with beneficial soil microbes appears as a good alternative for reducing agricultural chemical needs, especially for small farmers. This, however, requires selecting optimal combinations of crop varieties and beneficial microbes tested in field conditions. In this study, we investigated the response of rice plants to inoculation with arbuscular mycorrhizal fungi (AMF) and plant growth promoting bacteria (PGPB) under screenhouse and field conditions in two consecutive seasons in Senegal...
2016: PloS One
Antonino Baez-Rogelio, Yolanda Elizabeth Morales-García, Verónica Quintero-Hernández, Jesús Muñoz-Rojas
In this Crystal Ball we describe the negative effects of the scheme of intensive agriculture of the green revolution technology. To recover the contaminated soils derived from intensive farming is necessary introduce new successful technologies to replace the use of chemical fertilizer and toxic pesticides by organic fertilizers and biological control agents. Our principal speculation is that in a short time authors in the field of PGPB and bioremediation will be expanding the knowledge on the development of different formulations containing super-bacteria or a mixture of super-bacteria able to provide beneficial effect for agriculture and bioremediation...
January 2017: Microbial Biotechnology
Rafael José Marques Peixoto, Karla Rodrigues Miranda, Leandro Araujo Lobo, Alessandra Granato, Pedro de Carvalho Maalouf, Hugo Emiliano de Jesus, Caio T C C Rachid, Saulo Roni Moraes, Henrique Fragoso Dos Santos, Raquel Silva Peixoto, Alexandre Soares Rosado, Regina Maria Cavalcanti Pilotto Domingues
The Antarctic soil microbial community has a crucial role in the growth and stabilization of higher organisms, such as vascular plants. Analysis of the soil microbiota composition in that extreme environmental condition is crucial to understand the ecological importance and biotechnological potential. We evaluated the efficiency of isolation and abundance of strict anaerobes in the vascular plant Deschampsia antarctica rhizosphere collected in the Antarctic's Admiralty Bay and associated biodiversity to metabolic perspective and enzymatic activity...
November 2016: Extremophiles: Life Under Extreme Conditions
Yuanqing Chao, Wenshen Liu, Yanmei Chen, Wenhui Chen, Lihua Zhao, Qiaobei Ding, Shizhong Wang, Ye-Tao Tang, Tong Zhang, Rong-Liang Qiu
Mining activity for rare earth elements (REEs) has caused serious environmental pollution, particularly for soil ecosystems. However, the effects of REEs on soil microbiota are still poorly understood. In this study, soils were collected from abandoned sites of a REEs mine, and the structure, diversity, and co-occurrence patterns of soil microbiota were evaluated by Illumina high-throughput sequencing targeting 16S rRNA genes. Although microbiota developed significantly along with the natural restoration, the microbial structure on the site abandoned for 10 years still significantly differed from that on the unmined site...
October 12, 2016: Environmental Science & Technology
Fengshan Pan, Qian Meng, Sha Luo, Jing Shen, Bao Chen, Kiran Yasmin Khan, Jan Japenga, Xiaoxiao Ma, Xiaoe Yang, Ying Feng
Four plant growth-promoting bacteria (PGPB) were used as study materials, among them two heavy metal-tolerant rhizosphere strains SrN1 (Arthrobacter sp.) and SrN9 (Bacillus altitudinis) were isolated from rhizosphere soil, while two endophytic strains SaN1 (Bacillus megaterium) and SaMR12 (Sphingomonas) were identified from roots of the cadmium (Cd)/zinc (Zn) hyperaccumulator Sedum alfredii Hance. A pot experiment was carried out to investigate the effects of these PGPB on plant growth and Cd accumulation of oilseed rape (Brassica napus) plants grown on aged Cd-spiked soil...
March 4, 2017: International Journal of Phytoremediation
Faisal Islam, Tahira Yasmeen, Muhammad Saleem Arif, Muhammad Riaz, Sher Muhammad Shahzad, Qaiser Imran, Irfan Ali
Heavy metal contamination of agricultural soil has become a serious global problem. This study was aimed to evaluate the effects of two chromium (Cr) tolerant plant growth promoting bacteria (PGPB) in combination with salicylic acid (SA) on plant growth, physiological, biochemical responses and heavy metal uptake under Cr contamination. A pot experiment (autoclaved sand as growing medium) was performed using maize (Zea mays L.) as a test crop under controlled conditions. Cr toxicity significantly reduced plant growth, photosynthetic pigment, carbohydrates metabolism and increased H2O2, MDA, relative membrane permeability, proline and Cr contents in maize leaves...
November 2016: Plant Physiology and Biochemistry: PPB
Hong Shen, Xinhua He, Yiqing Liu, Yi Chen, Jianming Tang, Tao Guo
Limited information is available if plant growth promoting bacteria (PGPB) can promote the growth of fruit crops through improvements in soil fertility. This study aimed to evaluate the capacity of PGPB, identified by phenotypic and 16S rRNA sequencing from a vegetable purple soil in Chongqing, China, to increase soil nitrogen (N), phosphorus (P), and potassium (K) availability and growth of kiwifruit (Actinidia chinensis). In doing so, three out of 17 bacterial isolates with a high capacity of N2-fixation (Bacillus amyloliquefaciens, XD-N-3), P-solubilization (B...
2016: Frontiers in Microbiology
Chonglong Wang, Ju-Eon Park, Eui-Sung Choi, Seon-Won Kim
Farnesol is a sesquiterpenoid alcohol that has important industrial and medical potential. It is usually synthesized from farnesyl diphosphate (FPP) by farnesol synthase in plants. FPP accumulation can cause up-regulation of phosphatases capable of FPP hydrolysis, resulting in farnesol production in Escherichia coli. We found that PgpB and YbjG, two integral membrane phosphatases, can hydrolyze FPP into farnesol. Overexpression of FPP synthase (IspA) and PgpB, along with a heterologous mevalonate pathway, enabled recombinant E...
October 2016: Biotechnology Journal
Shuilong Tong, Yibin Lin, Shuo Lu, Meitian Wang, Mikhail Bogdanov, Lei Zheng
PgpB belongs to the lipid phosphate phosphatase protein family and is one of three bacterial integral membrane phosphatases catalyzing dephosphorylation of phosphatidylglycerol phosphate (PGP) to generate phosphatidylglycerol. Although the structure of its apo form became recently available, the mechanisms of PgpB substrate binding and catalysis are still unclear. We found that PgpB was inhibited by phosphatidylethanolamine (PE) in a competitive mode in vitro Here we report the crystal structure of the lipid-bound form of PgpB...
August 26, 2016: Journal of Biological Chemistry
Mendoza-Hernández José Carlos, Perea-Vélez Yazmin Stefani, Arriola-Morales Janette, Martínez-Simón Sara Melani, Pérez-Osorio Gabriela
This study poses a methodology in order to simultaneously quantify ACC deaminase and IAA levels in the same culture medium. Ten bacterial strains isolated from plant rhizosphere naturally settled in mining residues were chosen. These bacterial strains were characterized as PGPB, and all of them showed at least three characteristics (indole-3 acetic acid and siderophore production, ACC deaminase enzyme activity, and inorganic phosphate solubilization). Taxonomic identification showed that the strains belong to Enterobacter, Serratia, Klebsiella, and Escherichia genera...
July 2016: Microbiological Research
M Scagliola, Y Pii, T Mimmo, S Cesco, P Ricciuti, C Crecchio
Plant Growth Promoting Bacteria (PGPB) are considered a promising approach to replace the conventional agricultural practices, since they have been shown to affect plant nutrient-acquisition processes by influencing nutrient availability in the rhizosphere and/or those biochemical processes determining the uptake at root level of nitrogen (N), phosphorus (P), and iron (Fe), that represent the major constraints for crop productivity worldwide. We have isolated novel bacterial strains from the rhizosphere of barley (Hordeum vulgare L...
October 2016: Plant Physiology and Biochemistry: PPB
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"