scholarly journals The effect of plant growth promoting potentials of rhizosphere bacteria isolated from several halophytic species on vegetative growth and ionic content of wheat

2021 ◽  
Vol 8 (2) ◽  
pp. 104-117
Author(s):  
alireza Amini Hajiabadi ◽  
Asghar Mosleh Arani ◽  
Someh Ghasemi ◽  
mohammad hadi Rad ◽  
Shima Shabazi ◽  
...  
Keyword(s):  
Plant Growth ◽  
Vegetative Growth ◽  
Rhizosphere Bacteria ◽  
Ionic Content ◽  
Plant Growth Promoting ◽  
Growth Promoting

Azospirillum– plant relationships: environmental and physiological advances (1990–1996)

1997 ◽  
Vol 43 (2) ◽  
pp. 103-121 ◽  
Author(s):  
Yoav Bashan ◽  
Gina Holguin
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Comprehensive Analysis ◽  
Rhizosphere Bacteria ◽  
Bacterial Inoculation ◽  
Previous Review ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Physiological Studies

This review presents a critical and comprehensive analysis of the developments in environmental and physiological studies related to Azospirillum interactions with plants based on information published between 1990 and 1996. It was designed as an update of a previous review with a similar scope. Apart from an update, this review emphasizes the central issues of Azospirillum research today, such as coinoculation with other microorganisms and hormonal studies, shows the less researched areas, and proposes possible avenues for the exploitation of this bacterium in areas other than agriculture.Key words: Azospirillum, bacterial inoculation, plant–bacteria interaction, plant growth promoting rhizobacteria, rhizosphere bacteria.

Azospirillum-plant relationships: physiological, molecular, agricultural, and environmental advances (1997-2003)

2004 ◽  
Vol 50 (8) ◽  
pp. 521-577 ◽  
Author(s):  
Yoav Bashan ◽  
Gina Holguin ◽  
Luz E de-Bashan
Keyword(s):  
Plant Growth ◽  
Environmental Conditions ◽  
General Model ◽  
Critical Analysis ◽  
Current Knowledge ◽  
Rhizosphere Bacteria ◽  
Plant Growth Promoting Bacteria ◽  
Molecular Studies ◽  
Plant Growth Promoting ◽  
Growth Promoting

This review presents a critical and comprehensive documentation and analysis of the developments in agricultural, environmental, molecular, and physiological studies related to Azospirillum cells, and to Azospirillum interactions with plants, based solely on information published between 1997 and 2003. It was designed as an update of previous reviews (Bashan and Levanony 1990; Bashan and Holguin 1997a), with a similar scope of interest. Apart from an update and critical analysis of the current knowledge, this review focuses on the central issues of Azospirillum research today, such as, (i) physiological and molecular studies as a general model for rhizosphere bacteria; (ii) co-inoculation with other microorganisms; (iii) hormonal studies and re-consideration of the nitrogen contribution by the bacteria under specific environmental conditions; (iv) proposed Azospirillum as a non-specific plant-growth-promoting bacterium; (v) re-introduction of the "Additive Hypothesis," which suggests involvement of multiple mechanisms employed by the bacteria to affect plant growth; (vi) comment on the less researched areas, such as inoculant and pesticide research; and (vii) proposes possible avenues for the exploitation of this bacterium in environmental areas other than agriculture.Key words: Azospirillum, plant–bacteria interaction, plant-growth-promoting bacteria, PGPB, PGPR, rhizosphere bacteria.

scholarly journals Seed biopriming with P- and K-solubilizing Enterobacter hormaechei sp. improves the early vegetative growth and the P and K uptake of okra (Abelmoschus esculentus) seedling

2020 ◽  
Author(s):  
Muhamad Aidilfitri Mohamad Roslan ◽  
Nurzulaikha Nadiah Zulkifli ◽  
Zulfazli M. Sobri ◽  
Ali Tan Kee Zuan ◽  
Sim Choon Cheak ◽  
...  
Keyword(s):  
Plant Growth ◽  
Vegetative Growth ◽  
Enterobacter Cloacae ◽  
Abelmoschus Esculentus ◽  
Plant Growth Promoting Bacteria ◽  
Link Type ◽  
Plant Growth Promoting ◽  
Enterobacter Hormaechei ◽  
Growth Promoting ◽  
Seed Biopriming

AbstractLimited information is available that seed biopriming by plant growth-promoting bacteria such as those among Enterobacter spp. play a prominent role to enhance vegetative growth of plants. Contrary to Enterobacter cloacae, Enterobacter hormaechei is a less-studied counterpart despite its vast potential in plant growth-promotion mainly through the inorganic phosphorus (P) and potassium (K) solubilization abilities. To this end, 18 locally isolated bacterial pure cultures screened and three strains showed high P- and K-solubilizing capabilities. Light microscopy, biochemical tests and 16S rRNA gene sequencing revealed that strains 15a1 and 40a were closely related to Enterobacter hormaechei while strain 38 was closely related to Enterobacter cloacae (Accession number: MN294583; MN294585; MN294584). All Enterobacter spp. shared common plant growth-promoting traits, namely N2 fixators, indole-3-acetic acid producers and siderophore producers. Gibberellic acid was only produced by strain 38 and 40a, while exopolysaccharide formation was solely detected on agar containing colonies of strain 38. Under in vitro germination assay of okra (Abelmoschus esculentus) seeds, Enterobacter spp. significantly improved overall germination parameters and vigor index (19.6%) of seedlings. The efficacy of root colonization of Enterobacter spp. on the pre-treated seedling root tips was confirmed using Scanning Electron Microscopy (SEM). The pot experiment of bioprimed seeds of okra seedling showed significant improvement of the plant growth (> 28%) which corresponded to the increase of P and K uptakes (> 89%) as compared to the uninoculated control plants. The leaf surface area and the SPAD chlorophyll index of bioprimed plants were increased up to 29% and 9% respectively. This report revealed that the under-explored species of P- and K-solubilizing Enterobacter hormaechei sp. with multiple plant beneficial traits hold as a good potential sustainable approach for enhancement of soil fertility and P and K uptakes of plants.

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