Induction of tolerance to salinity in wheat genotypes by plant growth promoting endophytes: Involvement of ACC deaminase and antioxidant enzymes

Afridi, Muhammad Siddique; Amna, .; Sumaira,; Mahmood, Tariq; Salam, Abdus; Mukhtar, Tehmeena; Mehmood, Shehzad; Ali, Javed; Khatoon, Zobia; Bibi, Maryam; Javed, Muhammad Tariq; Sultan, Tariq; Chaudhary, Hassan Javed

doi:10.1016/j.plaphy.2019.03.041

Cited by 173 publications

(94 citation statements)

References 59 publications

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“…A significant induction of CAT removed the ROS produced during salt stress in BHU-AV3-inoculated plants. Our results are in conformity with other findings that report enhanced activities of CAT enzymes in PGPR-inoculated plants under oxidative stress (Chen et al, 2016;Mesa-Marín et al, 2018;Afridi et al, 2019).…”

Section: Discussionsupporting

confidence: 93%

Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

Vaishnav

Singh

et al. 2020

Front. Microbiol.

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Salt tolerant bacteria can be helpful in improving a plant's tolerance to salinity. Although plant-bacteria interactions in response to salt stress have been characterized, the precise molecular mechanisms by which bacterial inoculation alleviates salt stress in plants are still poorly explored. In the present study, we aimed to determine the role of a salt-tolerant plant growth-promoting rhizobacteria (PGPR) Sphingobacterium BHU-AV3 for improving salt tolerance in tomato through investigating the physiological responses of tomato roots and leaves under salinity stress. Tomato plants inoculated with BHU-AV3 and challenged with 200 mM NaCl exhibited less senescence, positively correlated with the maintenance of ion balance, lowered reactive oxygen species (ROS), and increased proline content compared to the non-inoculated plants. BHU-AV3-inoculated plant leaves were less affected by oxidative stress, as evident from a reduction in superoxide contents, cell death, and lipid peroxidation. The reduction in ROS level was associated with the increased antioxidant enzyme activities along with multiple-isoform expression [peroxidase (POD), polyphenol oxidase (PPO), and superoxide dismutase (SOD)] in plant roots. Additionally, BHU-AV3 inoculation induced the expression of proteins involved in (i) energy production [ATP synthase], (ii) carbohydrate metabolism (enolase), (iii) thiamine biosynthesis protein, (iv) translation protein (elongation factor 1 alpha), and the antioxidant defense system (catalase) in tomato roots. These findings have provided insight into the molecular mechanisms of bacteria-mediated alleviation of salt stress in plants. From the study, we can conclude that BHU-AV3 inoculation effectively induces antioxidant systems and energy metabolism in tomato roots, which leads to whole plant protection during salt stress through induced systemic tolerance.

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Section: Discussionsupporting

confidence: 93%

Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

Vaishnav

Singh

et al. 2020

Front. Microbiol.

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“…This time period coincides with the Paleogene period of the Cenozoic era when early flowering plants were also evolving, thus supporting the theory that plants may be the ancestral habitat for Cronobacter species [56,103,129,130]. Recently, Afridi et al provided evidence that plants inoculated with C. sakazakii (producing 1-aminocyclopropane-1-carboxylate deaminase, ACC deaminase) enhanced plant growth and saline stress tolerance [131]. It was concluded that ACC utilization by C. sakazakii promoted plant growth due to the lowering of excess ethylene production under salt stress.…”

Section: Exoproteins Involved In Osmotic Stress Responsementioning

confidence: 56%

The Secretion of Toxins and Other Exoproteins of Cronobacter: Role in Virulence, Adaption, and Persistence

et al. 2020

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Cronobacter species are considered an opportunistic group of foodborne pathogenic bacteria capable of causing both intestinal and systemic human disease. This review describes common virulence themes shared among the seven Cronobacter species and describes multiple exoproteins secreted by Cronobacter, many of which are bacterial toxins that may play a role in human disease. The review will particularly concentrate on the virulence factors secreted by C. sakazakii, C. malonaticus, and C. turicensis, which are the primary human pathogens of interest. It has been discovered that various species-specific virulence factors adversely affect a wide range of eukaryotic cell processes including protein synthesis, cell division, and ion secretion. Many of these factors are toxins which have been shown to also modulate the host immune response. These factors are encoded on a variety of mobile genetic elements such as plasmids and transposons; this genomic plasticity implies ongoing re-assortment of virulence factor genes which has complicated our efforts to categorize Cronobacter into sharply defined genomic pathotypes.

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“…Significant increase in chlorophyll content is an indication of higher N 2 fixation due to R. japonicum application. Afridi et al, (2019) stated that the application of K.rhizophila and C. sakazakii enhanced chlorophyll contents up to 17% in screening wheat genotypes against salt stress. Nitrogen can increase photosynthesis process in plants.…”

Section: Description Of Experimental Areamentioning

confidence: 99%

Effect of urea, bio-fertilizers and their interaction on the growth, yield and yield attributes of Cyamopsis Tetragonoloba

Gul

Salam

Afridi

et al. 2019

IJARe

Self Cite

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A field experiment was conducted at Agriculture Research Station Bahawalpur (Pakistan) during Kharif, 2016 to evaluate the response of cluster bean against bio and chemical fertilizers. The treatments consisted of three levels of nitrogen (urea 75g, 85g and 95g/40g seeds) with three level of Rhizobium (1.5g, 2.0g and 2.5g/40g of seeds). The experiment arranged in a randomized complete block design with 16 treatments and three replications. Combine treatment of urea and Rhizobium resulted in maximum plant height, number of pods/plants, number of seeds/pod, 1000 seeds weight, yield/plant, and chlorophyll content. Similarly, application of 2.5g rhizobium and 85g of urea separately resulted in highest number of leaves. Our results concluded that the use of urea and rhizobium in consortium could be a potential agronomic practice for the production of high grain yield in cluster bean.

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Induction of tolerance to salinity in wheat genotypes by plant growth promoting endophytes: Involvement of ACC deaminase and antioxidant enzymes

Cited by 173 publications

References 59 publications

Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

Sphingobacterium sp. BHU-AV3 Induces Salt Tolerance in Tomato by Enhancing Antioxidant Activities and Energy Metabolism

The Secretion of Toxins and Other Exoproteins of Cronobacter: Role in Virulence, Adaption, and Persistence

Effect of urea, bio-fertilizers and their interaction on the growth, yield and yield attributes of Cyamopsis Tetragonoloba

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