scholarly journals Prospective Zinc Solubilising Bacteria for Enhanced Nutrient Uptake and Growth Promotion in Maize (Zea maysL.)

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Praveen Kumar Goteti ◽  
Leo Daniel Amalraj Emmanuel ◽  
Suseelendra Desai ◽  
Mir Hassan Ahmed Shaik
Keyword(s):  
Plant Growth ◽  
Solid Medium ◽  
Growth Promotion ◽  
Dry Mass ◽  
Short Term ◽  
Culture Experiment ◽  
Zinc Supplement ◽  
Seed Bacterization ◽  
Significant Release ◽  
Pot Culture

Zinc (Zn) is one of the essential micronutrients required for optimum plant growth. Substantial quantity of applied inorganic zinc in soil is converted into unavailable form. Zinc solubilising bacteria are potential alternates for zinc supplement. Among 10 strains screened for Zn solubilisation, P29, P33, and B40 produced 22.0 mm clear haloes on solid medium amended with ZnCO3. Similarly, P17 and B40 showed 31.0 mm zone in ZnO incorporated medium. P29 and B40 showed significant release of Zn in broth amended with ZnCO3(17 and 16.8 ppm) and ZnO (18 and 17 ppm), respectively. The pH of the broth was almost acidic in all the cases ranging from 3.9 to 6.1 in ZnCO3and from 4.1 to 6.4 in ZnO added medium. Short term pot culture experiment with maize revealed that seed bacterization with P29 @ 10 g·kg−1significantly enhanced total dry mass (12.96 g) and uptake of N (2.268%), K (2.0%), Mn (60 ppm), and Zn (278.8 ppm).

scholarly journals Tomato Growth Promotion Induced by Stress Tolerant Phosphate Solubilizing Pseudomonas simiae in Arid trans-Himalaya

2018 ◽  
Vol 3 (2) ◽  
pp. 105
Author(s):  
Diskit Dolkar ◽  
Phuntsog Dolkar ◽  
Tsering Stobdan ◽  
Anand K Katiyar
Keyword(s):  
Salt Stress ◽  
Plant Growth ◽  
Growth Promotion ◽  
Tomato Seedling ◽  
Seed Bacterization ◽  
Insoluble Phosphate ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Tomato Growth ◽  
Phosphate Solubilizing

<p><em>Pseudomonas simiae</em> isolated from Seabuckthorn rhizosphere solubilized insoluble phosphate at 4-40ºC, pH 4-12 and in presence of 1-5% salt concentration. The optimum condition was observed at 28ºC, pH 6 and devoid of any salt stress. Ca<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> was solubilized to a great extent than FePO<sub>4</sub> and AlPO<sub>4</sub>. The isolate possess plant growth promoting attributes such as IAA (32 mg l<sup>-1</sup>), siderophore (78%) and HCN (0.1 OD at A<sub>625</sub>) production. Seed bacterization resulted in 30% and 51% enhanced shoot and root length, respectively in tomato seedling. Pot experiments revealed enhanced plant growth in <em>P. simiae</em> treated plants in both green shade net and open field conditions. Fruit yield was 9.8% and 19.8% higher over control in open and shade net condition, respectively. <strong></strong></p>

Characterization of plant growth-promoting Bacillus edaphicus NBT and its effect on lead uptake by Indian mustard in a lead-amended soil

2008 ◽  
Vol 54 (5) ◽  
pp. 417-422 ◽  
Author(s):  
Xia Fang Sheng ◽  
Chun Yu Jiang ◽  
Lin Yan He
Keyword(s):  
Plant Growth ◽  
Growth Promotion ◽  
Indian Mustard ◽  
Dry Mass ◽  
Water Soluble ◽  
Lead Uptake ◽  
Lead Carbonate ◽  
Plant Growth Promoting ◽  
Dead Bacterium ◽  
Amended Soil

The plant growth promotion characteristics of a heavy-metal-resistant strain of Bacillus edaphicus NBT was characterized. The strain was also evaluated for promoting plant growth and lead (Pb) uptake of Brassica juncea L. Czern (Indian mustard) in soil artificially contaminated with 0, 400, and 800 mg Pb·kg–1 soil. Atomic absorption spectrometer analysis demonstrated that strain NBT could release water-soluble Pb from lead carbonate in the solution. Strain NBT had the capacity to produce indole acetic acid, siderophores, and 1-aminocyclopropane-1-carboxylate deaminase. Low and high Pb treatments significantly decreased the growth of Indian mustard. Inoculation with strain NBT was found to increase root dry mass (ranging from 16% to 22%) and above-ground tissue dry mass (ranging from 24% to 30%) of Indian mustard in the Pb-amended soil. Strain NBT was able to mobilize Pb efficiently in plants in Pb-amended soil. In the soil treated with 400 and 800 mg Pb·kg–1 soil, the increase in Pb uptake varied from 18% to 46% in live bacterium-inoculated Indian mustard plants compared with dead bacterium-inoculated control. The strain was also able to colonize and develop in the rhizosphere soil of Indian mustard after root inoculation.

The effect of soil characteristics on the zinc-copper interaction in the nutrition of wheat

1982 ◽  
Vol 99 (1) ◽  
pp. 185-189 ◽  
Author(s):  
C. L. Arora ◽  
G. S. Sekhon
Keyword(s):  
Plant Growth ◽  
Physicochemical Characteristics ◽  
Soil Characteristics ◽  
Culture Experiment ◽  
Antagonistic Interaction ◽  
Pot Culture

SUMMARYA pot culture experiment was conducted on 11 soils differing in their physicochemical characteristics to study the occurrence of Zn-Cu interaction in relation to plant growth and Zn and Cu concentrations of wheat. The nature of the interaction was found to vary with the soils and the amounts of applied nutrients. The plant growth showed antagonistic interaction between Zn and Cu when one of the two elements was added in low amounts. However, when the two elements were applied in large amounts, their concentrations in the plants increased but the plant growth was adversely affected. The applied Zn generally failed to affect the uptake of native or low amounts of applied Cu whereas the applied Cu decreased the uptake of native zinc in five out of 11 soils.The DTPA extractable amounts of Zn in experimental soils were not affected signicantly by Cu application and vice versa. The fact that the application of Zn or Cu may not affect or increase the uptake of each other may depend upon the soil characteristics and the rates of their application.

scholarly journals Rhizosphere Soil Aggregation and Plant Growth Promotion of Sunflowers by an Exopolysaccharide-Producing Rhizobiumsp. Strain Isolated from Sunflower Roots

2000 ◽  
Vol 66 (8) ◽  
pp. 3393-3398 ◽  
Author(s):  
Younes Alami ◽  
Wafa Achouak ◽  
Christine Marol ◽  
Thierry Heulin
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Soil Structure ◽  
Growth Promotion ◽  
Dry Mass ◽  
Negative Effect ◽  
Normal Water ◽  
Modified Soil ◽  
Soil Macropore

ABSTRACT Root-adhering soil (RAS) forms the immediate environment where plants take up water and nutrients for their growth. We report the effect of an exopolysaccharide (EPS)-producing rhizobacterium (strain YAS34) on the physical properties of sunflower (Helianthus annuus L.) RAS, associated with plant growth promotion, under both water stress and normal water supply conditions. Strain YAS34 was isolated as a major EPS-producing bacterium from the rhizoplane of sunflowers grown in a French dystric cambisol. Strain YAS34 was assigned to the Rhizobium genus by 16S ribosomal DNA gene sequencing. Inoculation of sunflower seeds and soil with strain YAS34 caused a significant increase in RAS per root dry mass (dm) (up to 100%) and a significant increase in soil macropore volume (12 to 60 μm in diameter). The effect of inoculation on sunflower shoot dm (up to +50%) and root dm (up to +70%) was significant under both normal and water stress conditions. Inoculation with strain YAS34 modified soil structure around the root system, counteracting the negative effect of water deficit on growth. Using [15N]nitrate, we showed that inoculation made the use of fertilizer more effective by increasing nitrogen uptake by sunflower plantlets.

scholarly journals Purpureocillium lilacinum and Metarhizium marquandii as plant growth-promoting fungi

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9005 ◽  
Author(s):  
Noemi Carla Baron ◽  
Andressa de Souza Pollo ◽  
Everlon Cid Rigobelo
Keyword(s):  
Plant Growth ◽  
Growth Promotion ◽  
Dry Mass ◽  
In Planta ◽  
Purpureocillium Lilacinum ◽  
Plant Growth Promoting ◽  
Soybean Plants ◽  
High Yields ◽  
Vitro Analysis

Background Especially on commodities crops like soybean, maize, cotton, coffee and others, high yields are reached mainly by the intensive use of pesticides and fertilizers. The biological management of crops is a relatively recent concept, and its application has increased expectations about a more sustainable agriculture. The use of fungi as plant bioinoculants has proven to be a useful alternative in this process, and research is deepening on genera and species with some already known potential. In this context, the present study focused on the analysis of the plant growth promotion potential of Purpureocillium lilacinum, Purpureocillium lavendulum and Metarhizium marquandii aiming its use as bioinoculants in maize, bean and soybean. Methods Purpureocillium spp. and M. marquandii strains were isolated from soil samples. They were screened for their ability to solubilize phosphorus (P) and produce indoleacetic acid (IAA) and the most promising strains were tested at greenhouse in maize, bean and soybean plants. Growth promotion parameters including plant height, dry mass and contents of P and nitrogen (N) in the plants and in the rhizospheric soil were assessed. Results Thirty strains were recovered and characterized as Purpureocillium lilacinum (25), Purpureocillium lavendulum (4) and Metarhizium marquandii (1). From the trial for P solubilization and IAA production, seven strains were selected and inoculated in maize, bean and soybean plants. These strains were able to modify in a different way the evaluated parameters involving plant growth in each crop, and some strains distinctly increased the availability of P and N, for the last, an uncommon occurrence involving these fungi. Moreover, the expected changes identified at the in vitro analysis were not necessarily found in planta. In addition, this study is the first to evaluate the effect of the isolated inoculation of these fungi on the growth promotion of maize, bean and soybean plants.

Isolation of plant-growth-promoting rhizobacteria from rhizospheric soil of halophytes and their impact on maize (Zea mays L.) under induced soil salinity

2015 ◽  
Vol 61 (4) ◽  
pp. 307-313 ◽  
Author(s):  
Sami Ullah ◽  
Asghari Bano
Keyword(s):  
Plant Growth ◽  
Growth Promotion ◽  
Plant Growth Promoting Rhizobacteria ◽  
Dry Mass ◽  
Bacillus Sp ◽  
Rhizospheric Soil ◽  
Maize Crop ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Suaeda Fruticosa

The present investigation was aimed to scrutinize the salt tolerance potential of plant-growth-promoting rhizobacteria (PGPR) isolated from rhizospheric soil of selected halophytes (Atriplex leucoclada, Haloxylon salicornicum, Lespedeza bicolor, Suaeda fruticosa, and Salicornica virginica) collected from high-saline fields (electrical conductivity 4.3–5.5) of District Mardan, Pakistan. Five PGPR strains were identified using 16S rRNA amplification and sequence analysis. Bacillus sp., isolated from rhizospheric soil of Atriplex leucoclada, and Arthrobacter pascens, isolated from rhizospheric soil of Suaeda fruticosa, are active phosphate solubilizers and bacteriocin and siderophore producers; hence, their inoculation and co-inoculation on maize (‘Rakaposhi’) under induced salinity stress enhanced shoot and root length and shoot and root fresh and dry mass. The accumulation of osmolytes, including sugar and proline, and the elevation of antioxidant enzymes activity, including superoxide dismutase, peroxidase, catalase, and ascorbate peroxidase, were enhanced in the maize variety when inoculated and co-inoculated with Bacillus sp. and Arthrobacter pascens. The PGPR (Bacillus sp. and A. pascens) isolated from the rhizosphere of the mentioned halophytes species showed reliability in growth promotion of maize crop in all the physiological parameters; hence, they can be used as bio-inoculants for the plants growing under salt stress.

The effect of ammonium sulphite on plant growth

1933 ◽  
Vol 23 (1) ◽  
pp. 1-5
Author(s):  
A. H. Lewis ◽  
F. B. Marmoy
Keyword(s):  
Adverse Effect ◽  
Plant Growth ◽  
Dry Matter ◽  
Growth And Yield ◽  
Review Of The Literature ◽  
Culture Experiment ◽  
Conflicting Evidence ◽  
Heavy Loam ◽  
Loam Soil ◽  
Pot Culture

Summary and ConclusionsA review of the literature gave conflicting evidence as to the effect of sulphites on plant growth, so that a pot culture experiment was conducted to study the effects of the addition to ammonium sulphate of varying amounts of ammonium sulphite on the germination, growth and yield of mustard and rye on a heavy loam soil.Under the conditions of the experiment described, ammonium sulphite had no adverse effect on the germination, growth and yield of dry matter of mustard or rye.

Plastic Mulch Color Effects on Light Micro-environment and Watermelon Plant Growth

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 474d-474
Author(s):  
N.K. Damayanthi Ranwala ◽  
Dennis R. Decoteau
Keyword(s):  
Plant Growth ◽  
Light Transmission ◽  
Root Zone ◽  
Dry Mass ◽  
Plant Responses ◽  
Plastic Mulch ◽  
Plant Parts ◽  
Reflected Light ◽  
Total Light ◽  
Dry Mass Partitioning

This study was conducted to evaluate the spectral properties of various colored plastic color mulches and to determine the effects of upwardly reflected light from the mulch surfaces on watermelon plant growth when differences in root zone temperatures are minimized. Two-week-old watermelon plants were grown with black mulch, red-painted mulch, SRM-Red mulch (Sonoco, Inc., Harstville, S.C.), and white mulch. Total light reflection (58 μmol·m–2·s–1 in 400–700 nm) and red: far-red (R:FR = 0.44) of reflected light were lower in black mulch and highest in white mulch (634 and 0.92, respectively). Both black mulch and white mulch had same blue:red (B:R = 0.6) while white mulch had higher B:FR (0.58) in reflected light compared to black mulch (0.26). Reflective properties of red mulches were somewhat similar, and R:FR, B:R, and B:FR were 0.8, 0.2, and 0.18, respectively. However, SRM-Red mulch had highest total light (355 μmol·m–2·s–1 in 400–700 nm) transmission through the mulch, and R:FR, B:R, and B:FR were 0.84, 0.28, and 0.23, respectively. Light transmission through the other mulches was nonsignificant. Watermelon plants grown with black mulch and red mulches had higher internode lengths compared to white mulch after 20 days. Further, plants grown under black had significant higher petiole elongation accompanied with higher dry mass partitioning to petioles, and lower partitioning to roots, stems, and leaves. There was no effects of surface mulch color on total plant dry mass or photosynthesis although plants with black had higher transpiration rate. This suggests the differential regulation of dry mass partitioning among plant parts due to mulch color. The similar plant responses with black mulch and white mulch to plants treated with FR or R light at the end of photoperiod implies the involvement of phytochrome regulation of growth due to mulch surface color.

scholarly journals Genome Mining and Evaluation of the Biocontrol Potential of Pseudomonas fluorescens BRZ63, a New Endophyte of Oilseed Rape (Brassica napus L.) against Fungal Pathogens

2020 ◽  
Vol 21 (22) ◽  
pp. 8740
Author(s):  
Daria Chlebek ◽  
Artur Pinski ◽  
Joanna Żur ◽  
Justyna Michalska ◽  
Katarzyna Hupert-Kocurek
Keyword(s):  
Brassica Napus ◽  
Plant Growth ◽  
Pseudomonas Fluorescens ◽  
Oilseed Rape ◽  
Plant Growth Promotion ◽  
Fungal Pathogens ◽  
Growth Promotion ◽  
Genome Mining ◽  
Plant Colonization ◽  
Brassica Napus L

Endophytic bacteria hold tremendous potential for use as biocontrol agents. Our study aimed to investigate the biocontrol activity of Pseudomonas fluorescens BRZ63, a new endophyte of oilseed rape (Brassica napus L.) against Rhizoctonia solani W70, Colletotrichum dematium K, Sclerotinia sclerotiorum K2291, and Fusarium avenaceum. In addition, features crucial for biocontrol, plant growth promotion, and colonization were assessed and linked with the genome sequences. The in vitro tests showed that BRZ63 significantly inhibited the mycelium growth of all tested pathogens and stimulated germination and growth of oilseed rape seedlings treated with fungal pathogens. The BRZ63 strain can benefit plants by producing biosurfactants, siderophores, indole-3-acetic acid (IAA), 1-aminocyclopropane-1-carboxylate (ACC) deaminase, and ammonia as well as phosphate solubilization. The abilities of exopolysaccharide production, autoaggregation, and biofilm formation additionally underline its potential to plant colonization and hence biocontrol. The effective colonization properties of the BRZ63 strain were confirmed by microscopy observations of EGFP-expressing cells colonizing the root surface and epidermal cells of Arabidopsis thaliana Col-0. Genome mining identified many genes related to the biocontrol process, such as transporters, siderophores, and other secondary metabolites. All analyses revealed that the BRZ63 strain is an excellent endophytic candidate for biocontrol of various plant pathogens and plant growth promotion.

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