Effects of plant-growth-promoting rhizobacteria and arbuscular mycorrhizal fungus on plant growth, stevioside, NPK, and chlorophyll content of <i>Stevia rebaudiana</i>

Vafadar, Farinaz; Amooaghaie, Rayhaneh; Otroshy, Mahmoud

doi:10.1080/17429145.2013.779035

Cited by 183 publications

(121 citation statements)

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“…Similar influence on the growth and development was reported in horticultural crops like strawberry (Kokalis-Burelle 2003) and Prunus sp. (Bonaterra et al 2003) and stevia (Vafadar et al 2013). In the present study, other than floral characters, higher corm weight and corm diameter were observed in the bio-primed corms, whereas a decreased corm weight and corm diameter were found in untreated control.…”

Section: Discussionsupporting

confidence: 52%

Rhizosphere and endophytic bacteria for induction of salt tolerance in gladiolus grown in sodic soils

Damodaran

Rai

Jha

et al. 2014

Journal of Plant Interactions

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Extensive development of canal irrigation system led to formation of unproductive sodic lands, which limited the cultivation of flower crop gladiolus in the basins of major rivers. The purpose of this study was to isolate native rhizospheric and endophytic bacteria from sodic environment and evaluate their growth enhancement and bio-ameloirant properties in gladiolus under sodic soils. Sixteen isolates of plant-growth-promoting rhizospheric and endophytic bacteria were isolated and screened for growth promotion potential. The promising strains were identified and evaluated for growth and production in gladiolus. The plants treated with strains CSR-G-1, CSR-B-2, and CSR-B-3 significantly produced marketable spikes and higher number of florets/spike. Also, the treated plants showed an increased activity of superoxide dismutase, phenyl alanine lyase, catalase, peroxidase, phenols, and proline than control. Further, the soil pH, total carbonates, and sodium adsorption ratio were lower in treated soils. The Na + /K + ratio in leaves of treated plants was observed to be lower than control. In conclusion, these bio-inoculums can be used as growth enhancer and bioameliorant in sodic soils as an eco-friendly management strategy.

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Section: Discussionsupporting

confidence: 52%

Rhizosphere and endophytic bacteria for induction of salt tolerance in gladiolus grown in sodic soils

Damodaran

Rai

Jha

et al. 2014

Journal of Plant Interactions

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“…The efficacy of other rhizobacterial isolates was in the following order TAN2 > Azotobacter > TRN1 > TACC1 > TACC2. Vafadar et al (2014) concluded that in comparison to control, inoculation with PGPR significantly increased the mineral N, P, and K content in plants shoot and root. Campanelli et al (2013) examined that inoculation with PGPR significantly increased the macronutrients contents, i.e.…”

Section: Discussionmentioning

confidence: 98%

“…The effect of other isolates was in the order of TAN2 > Azotobacter > TRN1 > TACC1 > TACC2. Vafadar et al (2014) revealed that rhizobacterial inoculation increased the chlorophyll and carotenoid contents. Stefan et al (2013) investigated the effects of inoculation of two PGPR (S4 and S7) on photosynthesis and yield of runner bean and found that the tested strains, alone or in combination, increased photosynthesis and leaves chlorophyll and carotenoid contents.…”

Section: Discussionmentioning

confidence: 99%

“…Secretion of plant growth-promoting substances by the bacteria could be responsible for the beneficial effects of PGPR on plant growth parameters, e.g. number of leaves, root, and shoot length and weight (Vafadar et al 2014). The ACCdeaminase enriched rhizobacterial isolates (like TAN1) are capable of promoting the plant growth by increasing the root and shoot growth and number of leaves by lowering the endogenous ethylene production .…”

Section: Discussionmentioning

confidence: 99%

“…Vafadar et al (2014) concluded that inoculation with Azospirillum species enhanced the production of auxin and is thus related to the rapid establishment of a bigger root system that stimulates the growth and vigor and eventually seedling weight (root + shoot) of the host plant. The PGPR can supplement the nutrient requirement of tomato on soilless culture media under protected environment and increased the overall growth and weight of the tomato seedlings (Jan et al 2011).…”

Section: Discussionmentioning

confidence: 99%

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ACC-deaminase and/or nitrogen-fixing rhizobacteria and growth response of tomato (Lycopersicon pimpinellfoliumMill.)

Hassan

David

Bashir³

2014

Journal of Plant Interactions

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The study aimed to identify and select important plant growth-promoting rhizobacteria (PGPR) and examine the response of tomato growth upon inoculation. Inoculation with rhizobacterial isolates increased all the measured physical, chemical, and enzymatic growth parameters compared to control. However, the TAN1 isolate had the highest effect, and significantly (P < 0.05) increased the root length (8.25-fold), root fresh (8.36-fold) and dry (12.6-fold) weight, shoot length (6.92-fold), shoot fresh (7.18-fold) and dry (6.90-fold) weight, number of leaves (11.0-fold), chlorophyll a (6.25-fold), chlorophyll b (10.7-fold), carotenoid contents (8.80-fold), seedlings fresh (9.0-fold) and dry (8.71-fold) weight, plant macronutrient uptake, i.e. N (7.7-and 8.9-fold), P (10.5-and 11.4-fold), K (7.8-and 8.8-fold), , and Mg (12.6-and 9-fold) in shoot and root, plant micronutrient uptake, i.e. Zn (6.6-, 10.2-), Cu (9.3-, and 10.3-fold), Fe (7.7-and 10.7-fold), and Mn (4.7-and 5.7-fold) in shoot and root and plant antioxidant enzymes, i.e. glutathione S-transferase (10.7-fold), peroxidase (8.1-fold), and catalase (10.5-fold). Our results concluded that inoculation of agricultural crops with rhizobacteria is a very useful approach to increase the plant growth. The rhizobacteria having both 1-aminocyclopropane-1-carboxylate (ACC) deaminase and nitrogen-fixing activity are more effective than rhizobacteria possessing either ACC-deaminase or nitrogen-fixing activity alone for growth promotion of crops.Keywords: PGPR; ACC-deaminase; nitrogen fixation; ethylene and auxin; tomato IntroductionPlant growth-promoting rhizobacteria (PGPR) are free living microorganisms having beneficial effects on plants by colonizing their roots (Ahemad 2012). PGPR promote the plant growth by several direct and indirect ways (Ahemad 2012). Directly, PGPR provide the bacterium-synthesized compounds to the plants, facilitate the nutrient availability and uptake and production of certain phytohormones, e.g. auxin, cytokinins, ethylene, and abscisic acid and giberelins (Ahemad 2012). Indirectly, PGPR minimize or prevent the harmful effects of pathogenic organisms (Ahemad & Malik 2011), moreover, mobilize the nutrients in soils and improve the soil structure (Ahemad & Malik 2011). Inoculation of agricultural crops with PGPR results in multiple positive effects on plant, e.g. increase in the plant growth and vigor, increment in the chlorophyll, protein, proline, and antioxidant enzymes (e.g. peroxidase (POX), catalase, and glutathione reductase) activity that increase the plant immunity (Sahran & Nehra 2011). It has been observed that increased activity of antioxidant enzymes is correlated with resistance, against both biotic and abiotic stresses, in many plant species (Jan et al. 2011).At present, the use of microorganisms with the aim of improving crop production on sustainable basis has increased tremendously in various parts of the world (Glick 2012). This is due to the emerging demand for dependence diminishing of synthetic chemical products, to the grow...

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Bio‐Geotechnologies in Mine Land Restoration

2023

Eco‐Restoration of Mine Land

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Effects of plant-growth-promoting rhizobacteria and arbuscular mycorrhizal fungus on plant growth, stevioside, NPK, and chlorophyll content of Stevia rebaudiana

Cited by 183 publications

References 30 publications

Rhizosphere and endophytic bacteria for induction of salt tolerance in gladiolus grown in sodic soils

Rhizosphere and endophytic bacteria for induction of salt tolerance in gladiolus grown in sodic soils

ACC-deaminase and/or nitrogen-fixing rhizobacteria and growth response of tomato (Lycopersicon pimpinellfoliumMill.)

Bio‐Geotechnologies in Mine Land Restoration

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