Alleviation of Salt Stress in Eggplant (<i>Solanum melongena</i>L.) by Plant-Growth-Promoting Rhizobacteria

El-Azeem, S. A. M. Abd; Elwan, M.; Sung, Jwa Kyung; Ok, Yong Sik

doi:10.1080/00103624.2012.666305

Cited by 39 publications

(19 citation statements)

References 30 publications

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“…Recently, Van Oosten et al (2018) reported that inoculation of tomato plants with A. chroococcum 76A under both moderate (50 mM NaCl) and severe (100 mM NaCl) salt stresses increased growth parameters i.e., shoot dry weight, fresh fruit weight and fruit number per plant as compared to the control. Abd El-Azeem et al (2012) reported that ST-PGPR strains of Xanthobacter autotrophicus BM13, E. aerogenes BM10, and Bacillus brevis FK2 alleviated negative effects of salt and improved growth and yield in egg plant. Furthermore, Ge and Zhang (2019) showed that under salt stress (3% NaCl), Rhodopseudomonas palustris G5 increased shoot height, root length, fresh weight, dry weight, total chlorophyll content and soluble sugar content of cucumber seedlings.…”

Section: Vegetable Cropsmentioning

confidence: 99%

Salt-Tolerant Plant Growth Promoting Rhizobacteria for Enhancing Crop Productivity of Saline Soils

et al. 2019

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Soil salinity has emerged as a serious issue for global food security. It is estimated that currently about 62 million hectares or 20 percent of the world's irrigated land is affected by salinity. The deposition of an excess amount of soluble salt in cultivable land directly affects crop yields. The uptake of high amount of salt inhibits diverse physiological and metabolic processes of plants even impacting their survival. The conventional methods of reclamation of saline soil which involve scraping, flushing, leaching or adding an amendment (e.g., gypsum, CaCl 2 , etc.) are of limited success and also adversely affect the agro-ecosystems. In this context, developing sustainable methods which increase the productivity of saline soil without harming the environment are necessary. Since long, breeding of salt-tolerant plants and development of salt-resistant crop varieties have also been tried, but these and aforesaid conventional approaches are not able to solve the problem. Salt tolerance and dependence are the characteristics of some microbes. Salt-tolerant microbes can survive in osmotic and ionic stress. Various genera of salt-tolerant plant growth promoting rhizobacteria (ST-PGPR) have been isolated from extreme alkaline, saline, and sodic soils. Many of them are also known to mitigate various biotic and abiotic stresses in plants. In the last few years, potential PGPR enhancing the productivity of plants facing salt-stress have been researched upon suggesting that ST-PGPR can be exploited for the reclamation of saline agro-ecosystems. In this review, ST-PGPR and their potential in enhancing the productivity of saline agro-ecosystems will be discussed. Apart from this, PGPR mediated mechanisms of salt tolerance in different crop plants and future research trends of using ST-PGPR for reclamation of saline soils will also be highlighted.

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Section: Vegetable Cropsmentioning

confidence: 99%

Salt-Tolerant Plant Growth Promoting Rhizobacteria for Enhancing Crop Productivity of Saline Soils

et al. 2019

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“…Under salt stress, Na + is accumulated at higher concentrations in plant tissues, causing changes in Na + /K + ratio and the inhibition of essential nutrient uptake [ 14 , 24 , 30 ]. This could be attributed to the competition between similar ionic radii of Na + and K + in soils [ 31 ], causing the dysfunctional ionic selectivity of the cell membranes.…”

Section: Adverse Effects Of Salinity On Plantsmentioning

confidence: 99%

“…The bacterization of plant crops with PGPR and the implementation of these useful rhizobacteria in seed biopriming have demonstrated their beneficial properties in enhancing plant growth and development, and in augmenting plant salt stress tolerance through different mechanisms. PGPR aid to alleviate salinity stress in plants by boosting water absorption capability, enhancing essential nutrients uptake, accumulating osmolytes (OS) (e.g., proline (Pro), glutamate (Glu), glycine betaine, soluble sugars, choline, O-sulphate, and polyols), increasing AEs activities (e.g., superoxide dismutase (SOD, EC 1.15.1.1), peroxidase (POD, EC 1.11.1.7), catalase (CAT, EC 1.11.1.6), ascorbate peroxidase (APX, EC 1.11.1.11), monodehydroascorbate reductase (MDAR, EC 1.6.5.4), dehydroascorbate reductase (DHAR, EC 1.8.5.1), glutathione reductase (GR, EC 1.6.4.2), and non-enzymatic antioxidants (NEAs) (e.g., ascorbate (ASC), glutathione (GSH), tocopherols (TCP), carotenoids (Car), and polyphenols (PPs)) in plant tissues [ 24 , 25 , 26 , 27 , 28 ]. In all types of salinity, sodium chloride (NaCl) is the most soluble and widespread salt [ 17 ] and Na + is the primary cause of ion-specific damage for many plants, especially for graminaceous crops [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Roles of Plant Growth-Promoting Rhizobacteria (PGPR) in Stimulating Salinity Stress Defense in Plants: A Review

Ha-Tran

Nguyen

Hung

et al. 2021

IJMS

136

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To date, soil salinity becomes a huge obstacle for food production worldwide since salt stress is one of the major factors limiting agricultural productivity. It is estimated that a significant loss of crops (20–50%) would be due to drought and salinity. To embark upon this harsh situation, numerous strategies such as plant breeding, plant genetic engineering, and a large variety of agricultural practices including the applications of plant growth-promoting rhizobacteria (PGPR) and seed biopriming technique have been developed to improve plant defense system against salt stress, resulting in higher crop yields to meet human’s increasing food demand in the future. In the present review, we update and discuss the advantageous roles of beneficial PGPR as green bioinoculants in mitigating the burden of high saline conditions on morphological parameters and on physio-biochemical attributes of plant crops via diverse mechanisms. In addition, the applications of PGPR as a useful tool in seed biopriming technique are also updated and discussed since this approach exhibits promising potentials in improving seed vigor, rapid seed germination, and seedling growth uniformity. Furthermore, the controversial findings regarding the fluctuation of antioxidants and osmolytes in PGPR-treated plants are also pointed out and discussed.

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“…5) that K + is the main cation leading to osmotic adjustment in leaves, stems and roots of different soil EC-exposed tomato plants at 28 days as reported in studies by Matoh et al (1988), Lissner et al (1999) and Vasquez et al (2005). Saltinity influenced plant metabolism, resulting in decreased crop growth and yield through osmotic inhibition of the available water uptake by roots or the specific ion affects (Abd El-Azeem et al 2012;Yang et al 2009). …”

Section: Concentration Of Carbohydrates and Organic Acidsmentioning

confidence: 84%

“…Salinity causes significant reductions in growth and yield of many crop plants throughout the world due to soil degradation (Abd El-Azeem et al 2012;Jung et al 2011;Ok et al 2007). However, salinity impact on greenhouse-grown crops differs from that on field-grown crops due to the overall much higher concentrations of nutrients in greenhouse soils.…”

Section: Introductionmentioning

confidence: 99%

Physiological Responses of Tomato Plants and Soil Microbial Activity in Salt Affected Greenhouse Soil

Sung¹,

Lee²,

Nam³

et al. 2012

Korean Journal of Soil Science and Fertilizer

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Crop productivity decreases globally as a result of salinization. However, salinity impact on greenhouse-grown crops is much higher than on field-grown crops due to the overall concentrations of nutrients in greenhouse soils. Therefore, this study was performed to determine the short-term changes in growth, photosynthesis, and ) at 28 days. In our experiment, soluble sugars and starch were sensitive markers for salt stress and thus might assume the status of crops against various salt conditions. Taken together, tomato plants found to have tolerance against moderate soil EC stress. Various EC levels (<3.0 ~ 10.0 dS m -1 ) led to a slight decrease in organic matter (OM) contents in soils at 28 days. Salinity stress led to higher microbial activity in soils, followed by a decomposition of OM in soils as indicated by the changes in soil chemical properties.

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Alleviation of Salt Stress in Eggplant (Solanum melongenaL.) by Plant-Growth-Promoting Rhizobacteria

Cited by 39 publications

References 30 publications

Salt-Tolerant Plant Growth Promoting Rhizobacteria for Enhancing Crop Productivity of Saline Soils

Salt-Tolerant Plant Growth Promoting Rhizobacteria for Enhancing Crop Productivity of Saline Soils

Roles of Plant Growth-Promoting Rhizobacteria (PGPR) in Stimulating Salinity Stress Defense in Plants: A Review

Physiological Responses of Tomato Plants and Soil Microbial Activity in Salt Affected Greenhouse Soil

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