Amelioration of flooding stress by ACC deaminase-containingplant growth-promoting bacteria

Grichko, Varvara P.; Glick, Bernard R.

doi:10.1016/s0981-9428(00)01212-2

Cited by 423 publications

(200 citation statements)

References 26 publications

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“…ACC deaminase-producing isolate REN 1 may hydrolyze ACC, the immediate precursor of the plant hormone ethylene, by ACC deaminase to NH 3 and α-ketobutyrate . The isolate uses the NH + 4 evolved from ACC as a source of N and thereby decrease ACC within the plant with the accompanying reduction of plant ethylene (Belimov et al 2001;Grichko and Glick 2001). Previous studies showed addition of ACC reduced the endophytic colonization of parental Medicago sativa by K. pneumoniae 342 (Iniguez et al 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Nitrogen also plays a role in plant root system and can increase root length. Plants that are inoculated with rhizobacteria having ACC-deaminase are more resistant to the damaging effects of stress ethylene that is produced as a result of stressed environments such as flooding (Grichko and Glick 2001), drought (Zahir et al 2007) and high salt concentration (Kausar and Shahzad 2006;Nadeem et al 2007). In the present work, higher population size of endophytic ACC deaminase and IAAproducing bacteria were recovered from roots.…”

Section: Discussionmentioning

confidence: 99%

“…The beneficial effects of the PGPR have been reported in many crops (Khalid et al 2004;Malhotra and Srivastava 2009). Plants treated with ACC deaminase-containing bacteria have longer roots (Belimov et al 2007) and can better resist the inhibitory effects of stress ethylene on plant growth imposed by heavy metals (Burd et al 2000), pathogens (Wang et al 2000) and flooding (Grichko and Glick 2001). It was previously proposed that rhizobacteria attached to the surface of plant roots or seeds can take up some of the ACC exuded by the plant and degrade it through the action of ACC deaminase .…”

Section: Introductionmentioning

confidence: 99%

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Bacterial biosynthesis of 1-aminocyclopropane-1-caboxylate (ACC) deaminase, a useful trait to elongation and endophytic colonization of the roots of rice under constant flooded conditions

Etesami

Hosseini

Alikhani

2014

Physiol Mol Biol Plants

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This study was conducted to investigate the role of 1-aminocyclopropane-1-carboxylate (ACC) deaminase in Pseudomonas fluorescens strain REN 1 and its ability to reduce ethylene levels produced during stress, endophytically colonize and promote the elongation of the roots of rice seedlings under gnotobiotic conditions. We isolated 80 bacteria from inside roots of rice plants grown in the farmers' fields in Guilan, Iran. All of the isolates were characterized for plant growth promoting (PGP) traits. In addition, the colonization assay of these isolates on rice seedlings was carried out to screen for competent endophytes. The best bacterial isolate, based on ACC deaminase production, was identified and used for further study. 16S rDNA sequence analysis revealed that the endophyte was closely related to Pseudomonas fluorescens. The results of this study showed ACC deaminase containing P. fluorescens REN1 increased in vitro root elongation and endophytically colonized the root of rice seedlings significantly, as compared to control under constant flooded conditions. The trait of low amount of indole-3-acetic acid (IAA) production (<15 μg mL −1 ) and the high production of ACC deaminase by bacteria may be main factors in colonizing rice seedling roots compared to other PGP traits (siderophore production and phosphate solubilization) in this study. Endophytic IAA and ACC deaminase-producing bacteria may be preferential selections by rice seedlings. Therefore, it may be suggested that the utilization of ACC as a nutrient gives the isolates advantages in more endophytic colonization and increase of root length of rice seedlings.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bacterial biosynthesis of 1-aminocyclopropane-1-caboxylate (ACC) deaminase, a useful trait to elongation and endophytic colonization of the roots of rice under constant flooded conditions

Etesami

Hosseini

Alikhani

2014

Physiol Mol Biol Plants

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“…This shows that tomato plants produced more chlorophyll during salinity stress. Reports suggest that PGPR having a potential of solubilizing phosphorus; calcium and potassium protect the plants against sodium toxicity (Grichko and Glick 2001;Egamberdiyeva and Hoflich 2003). Satti and Lopez (1994) also showed that an increase in K ' concentration in tomato plants exposed to salt stress could ameliorate the deleterious effect of salt stress.…”

Section: Effect Of Salinity On Growth Of Tomato Plantsmentioning

confidence: 99%

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

Tank

Saraf

2010

Journal of Plant Interactions

299

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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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“…The ability to synthesize IAA has been detected in many rhizobacteria as well as in pathogenic, symbiotic and free living bacterial isolates. ( Tsavkelova et al, 2006) Various studies have demonstrated that plants treated with PGPR bacteria that produce ACC deaminase have increased their resistance to environmental stress (Grinchko and Glick, 2001). …”

Section: Colony Morphology and Gram Reaction:-mentioning

confidence: 99%

Screening of Root Nodule Bacteria From Wild Legumes for Their Possible Role in Plant Growth Promotion.

Gujar¹,

Saini²,

Chandurkar³

et al. 2017

IJAR

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Amelioration of flooding stress by ACC deaminase-containingplant growth-promoting bacteria

Cited by 423 publications

References 26 publications

Bacterial biosynthesis of 1-aminocyclopropane-1-caboxylate (ACC) deaminase, a useful trait to elongation and endophytic colonization of the roots of rice under constant flooded conditions

Bacterial biosynthesis of 1-aminocyclopropane-1-caboxylate (ACC) deaminase, a useful trait to elongation and endophytic colonization of the roots of rice under constant flooded conditions

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

Screening of Root Nodule Bacteria From Wild Legumes for Their Possible Role in Plant Growth Promotion.

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