Effects of rhizobacterial ACC deaminase activity on Arabidopsis indicate that ethylene mediates local root responses to plant growth-promoting rhizobacteria

Contesto, Céline; Desbrosses, Guilhem; Lefoulon, Cécile; Béna, Gilles; Borel, Florie; Galland, Marc; Gamet, Lydia; Varoquaux, Fabrice; Touraine, Bruno

doi:10.1016/j.plantsci.2008.01.020

Cited by 111 publications

(68 citation statements)

References 73 publications

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“…The production of antifungal metabolites by Pseudomonas spp. has been reported previously (Pal et al, 2001;Banchio et al, 2008;Contesto et al, 2008).…”

Section: Discussionmentioning

confidence: 52%

“…Co-inoculation with symbiotic and rhizosphere bacteria may enhance nodulation by a variety of mechanisms e.g. PGPR can reduce endogenous ethylene production by plants, antibiotics against pathogenic organisms, siderophores chelating insoluble cations and colonize root surfaces, thereby out competing pathogens (Parmar and Dadarwal, 1999;Banchio et al, 2008;Contesto et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…PGPR may increase the efficiency of Rhizobium inoculation in legumes through the production of antibiotics, siderophore, and certain enzymes. They also enhance the infection sites for Rhizobium by colonizing the root surface (Parmar and Dadarwal, 1999;Contesto et al, 2008). These PGPR may also compete with the Rhizobium for food and other nutrients thus may also inhibit nodule formation and growth in a given symbiotic relationship, depending upon the nature and concentration of secondary metabolites released by these bacteria (Contesto et al, 2008).…”

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confidence: 99%

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Integrated use of Rhizobium leguminosarum, Plant Growth Promoting Rhizobacteria and Enriched Compost for Improving Growth, Nodulation and Yield of Lentil (Lens culinaris Medik.)

Iqbal

Khalid

Shahzad

et al. 2012

Chilean J. Agric. Res.

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Maintenance of high bacterial population in the rhizosphere improves the efficiency of these organisms. This high bacterial population can be maintained by the application of enriched compost which supports their growth and activities. Thus integrated use of Rhizobium, plant growth promoting rhizobacteria (PGPR) containing 1-aminocyclopropane-1-carboxylate deaminase (ACC-deaminase) and P-enriched compost (PEC) could be highly effective for promoting growth, nodulation, and yield of lentil (Lens culinaris Medik.). A field study was conducted to evaluate the potential of Rhizobium, PGPR containing ACC-deaminase and PEC for promoting growth of lentil. For this study, the soil type was sandy clay loam soil having pH 7.6; EC (electrical conductivity) 2.8 dS m -1 ; organic matter (OM) 0.59%; total N 0.032%; available P 7.9 mg kg -1 , and extractable K 129 mg kg -1 . Treatments were replicated thrice, using randomized complete block (RCB) design. Results showed that the integrated use of R. leguminosarum with Pseudomonas spp. containing ACC-deaminase along with PEC was highly effective and caused up to 73.5, 73.9, 74.4, 67.5, 73.3, 65.8, 40.5, and 52.5% increase in fresh biomass, grain yield, straw yield, pods plant -1 , nodule plant -1 , nodule dry weight plant -1 , 1000-grain weight, and N content in grain of lentil, respectively, as compared to respective control. It is concluded that integrated use of R. leguminosarum with Pseudomonas spp. having trait ACC-deaminase plus PEC would be an effective approach for better nodulation which consequently improved yield of lentil under natural conditions.

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“…The production of antifungal metabolites by Pseudomonas spp. has been reported previously (Pal et al, 2001;Banchio et al, 2008;Contesto et al, 2008).…”

Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Integrated use of Rhizobium leguminosarum, Plant Growth Promoting Rhizobacteria and Enriched Compost for Improving Growth, Nodulation and Yield of Lentil (Lens culinaris Medik.)

Iqbal

Khalid

Shahzad

et al. 2012

Chilean J. Agric. Res.

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“…As a result, ACC levels in the plant are lowered and the ET content is reduced (Glick et al 1998). Once ET is reduced there is an increase in plant biomass (Contesto et al 2008;Saleem et al 2007). Bacteria with ACC deaminase activity have been extensively used for alleviating diverse stresses in plants.…”

Section: Plant Growth Promotion Resulting From Better Nutrient Uptakementioning

confidence: 99%

Agricultural uses of plant biostimulants

2014

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Background Plant biostimulants are diverse substances and microorganisms used to enhance plant growth. The global market for biostimulants is projected to increase 12 % per year and reach over $2,200 million by 2018. Despite the growing use of biostimulants in agriculture, many in the scientific community consider biostimulants to be lacking peer-reviewed scientific evaluation. Scope This article describes the emerging definitions of biostimulants and reviews the literature on five categories of biostimulants: i. microbial inoculants, ii. humic acids, iii. fulvic acids, iv. protein hydrolysates and amino acids, and v. seaweed extracts.Conclusions The large number of publications cited for each category of biostimulants demonstrates that there is growing scientific evidence supporting the use of biostimulants as agricultural inputs on diverse plant species. The cited literature also reveals some commonalities in plant responses to different biostimulants, such as increased root growth, enhanced nutrient uptake, and stress tolerance.

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“…Similar elongation in root and shoot length of maize under 6 dsms (1 NaCl stress in the presence of PGPR was observed by Nadeem et al (2006). Contrarily, Contesto et al (2008) and Desbrosses et al (2009) have reported results that showed that ACC deaminase does have a negative effect on root hair elongation as expected from a decreased ethylene production, but that PGPR triggered-root hair elongation also involves an ethylene-independent pathway, and that this latter effect is stronger than the ethylene-dependent, ACC deaminase-susceptible, pathway. In addition, they show that while it affects root hair growth, PGPR ACC deaminase activity does not affect lateral root growth.…”

Section: Effect Of Salinity On Growth Of Tomato Plantsmentioning

confidence: 97%

Salinity-resistant plant growth promoting rhizobacteria ameliorates sodium chloride stress on tomato plants

Tank

Saraf

2010

Journal of Plant Interactions

291

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Salinity is one of the major anthropogenic as well as environmental stresses that reduce plant growth. Results show that even after being adapted up to 6% sodium chloride (NaCl) concentration, all selected isolates were able to solubilize phosphate, and produce phytohormones, siderophores and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase enzyme. NT1 was found to exhibit the highest phosphate solubilization zones (25 mm), siderophore production (1000 mg ml (1 ) as well as ACC deaminase production (50 mMmg (1 h (1 ) potential under laboratory conditions. On the other hand, pot studies conducted on tomato plants under 2% NaCl stress proved that C4 and T15 were the best growth promoters. C4 showed 50% enhancement in root and shoot length as compared to NaCl added untreated plants as well as in absence of NaCl. C4 also enhanced salinity tolerance in plants with the lowest uptake of NaCl thereby reducing the salt stress on plants. C5 enhanced biomass production in tomato plants with increased uptake of the salts by plants, thereby reducing the salt concentration in the soil. The study thus shows that the selected isolates can be used for the plant growth promotion of plants under salinity stress.

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Effects of rhizobacterial ACC deaminase activity on Arabidopsis indicate that ethylene mediates local root responses to plant growth-promoting rhizobacteria

Cited by 111 publications

References 73 publications

Integrated use of Rhizobium leguminosarum, Plant Growth Promoting Rhizobacteria and Enriched Compost for Improving Growth, Nodulation and Yield of Lentil (Lens culinaris Medik.)

Integrated use of Rhizobium leguminosarum, Plant Growth Promoting Rhizobacteria and Enriched Compost for Improving Growth, Nodulation and Yield of Lentil (Lens culinaris Medik.)

Agricultural uses of plant biostimulants

Salinity-resistant plant growth promoting rhizobacteria ameliorates sodium chloride stress on tomato plants

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