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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Culturable endophytic Pseudomonas fluorescens Z1B4 isolated from Zanthoxylum alatum Roxb. with stress-tolerance and plant growth-promoting potential

100%
Vyas P., Kaur R.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
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2021
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tom 102
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nr 3
2

Insights into fluoride-induced oxidative stress and antioxidant defences in plants

100%
Sharma R., Kaur R.
Acta Physiologiae Plantarum
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2018
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tom 40
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nr 10
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Biosurfactant from Lactobacillus sp. as an antibiofilm agent

100%
Kaur S., Kaur R.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2019
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tom 100
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nr 3
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Exploration of phytate-mineralizing bacteria with multifarious plant growth-promoting traits

100%
Kaur R., Kaur S.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
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2022
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tom 103
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nr 2
5

Role of catalase, H2O2 and phenolics in resistance of pigeonpea towards Helicoverpa armigera (Hubner)

81%
Kaur R., Gupta A. K., Taggar G. K.
Acta Physiologiae Plantarum
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2014
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tom 36
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nr 06
Rapid generation of superoxide radicals and accumulation of H₂O₂ is a characteristic early response of plants following perception of insect herbivory signals. Induction of oxidative burst on account of herbivory triggers various defense mechanisms in plants. Response of superoxide and H₂O₂-metabolizing enzymes and secondary metabolites in nine pigeonpea genotypes to Helicoverpa armigera feeding was investigated. Out of nine, four genotypes were found to be moderately resistant, three were intermediate and two were moderately susceptible. In general, H. armigera infestation resulted in increase in superoxide dismutase activity, H₂O₂ and phenolics content and decrease in catalase (CAT) activity in leaves, developing seeds and pod wall of pigeonpea genotypes. Peroxidase activity was found only in leaves. Among genotypes, the increase in phenolic constituents was found greater in moderately resistant genotypes than in moderately susceptible genotypes; this might determine their contribution in providing resistance to genotypes against H. armigera infestation. The capability of moderately resistant genotypes to maintain relatively lower H₂O₂ content and higher CAT activity in pod wall and developing seeds also appeared to determine resistance of genotypes towards H. armigera. Expression of resistance to H. armigera was found to be associated with a negative correlation of H₂O₂- metabolizing enzymes and phenolics with pod damage as well as with negative association between CAT activity and H₂O₂ content. A positive correlation found between H₂O₂ content and pod damage suggested the accumulation of H₂O₂ in response to pod borer attack. In addition, correlation analysis also revealed a positive association between CAT, phenolic compounds and DPPH radical scavenging activity following pod borer attack; this indicated their contribution in resistance mechanisms against H. armigera herbivory.
6

Variation of invertase activities in four wheat cultivars as influenced by thiourea and high temperature

81%
Asthir B., Kaur R., Bains N. S.
Acta Physiologiae Plantarum
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2015
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tom 37
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nr 01
The effects of metal ions and thiourea on the activities of invertases in relation to the accumulation of free sugars and soluble protein were studied in four germinating wheat (Triticum aestivum) cultivars PBW 343, PBW 534 (heat susceptible), C 306 and C 273 (heat tolerant) under normal (25 C) and high temperature (HT, 32 C) conditions. High temperature significantly increased the activities of soluble acid, neutral and cell wall-bound invertases in correspondence with an increase in reducing sugar and soluble protein whereas the content of non reducing sugar was decreased in both root and shoot. Thiourea application under HT stress further elevated invertase activities and soluble protein content in all the four cultivars studied. Invertase activities of C 306 and C 273 cultivars were more sensitive to sulfhydryl group modifiers whereas the inhibitory effect of Ca2⁺, Hg2⁺, Mg2⁺ and Zn2⁺ was much more pronounced in PBW 343 and PBW 534. Apparently, inhibitory effect of iodine and Hg2⁺ on invertase activities in root and shoot of wheat confirmed the presence of sulfhydryl group at the active site of the enzyme. The results indicate that differential response of wheat cultivars may be anticipated to in vitro modulation of invertases to metal ions and TU that leads to selective modification of carbon metabolism under the influence of HT.
7

Heavy metal concentration and mutagenic assessment of pond water samples: a case study from India

81%
Rajput S., Kaur T., Arora S., Kaur R.
Polish Journal of Environmental Studies
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2020
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tom 29
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nr 1
8

Heat-stress induced inhibition in growth and chlorosis in mungbean (Phaseolus aureus Roxb.) is partly mitigated by ascorbic acid application and is related to reduction in oxidative stress

51%
Kumar S., Kaur R., Kaur N., Kaur N., Bhandhari K., Kaushal N., Gupta K., Bains T. S., Nayyar H.
Acta Physiologiae Plantarum
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2011
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tom 33
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nr 6
The rising temperatures (>35°C) are proving detrimental to summer-sown mungbean genotypes that experience inhibition of vegetative and reproductive growth. In the present study, the mungbean plants growing hydroponically at varying temperatures of 30/20°C (control), 35/25, 40/30, and 45/35°C (as day/night 12 h/12 h) with (50 µM) or without ascorbic acid (ASC) were investigated for effects on growth, membrane damage, chlorophyll loss, leaf water status, components of oxidative stress, and antioxidants. The ASC-treated plants showed significant improvement in germination and seedling growth especially at 40/30 and 45/35°C. The damage to membranes, loss of water, decrease in cellular respiration, and chlorophyll were significantly prevented by ASC treatment to plants growing at these temperatures. The oxidative stress measured as malondialdehyde and hydrogen peroxide content was observed to be significantly lower at high temperatures with ASC application. The activities of superoxide dismutase, catalase, ascorbate peroxidase, and glutathione reductase increased at 40/30°C but decreased at 45/35°C in the absence of ASC while with its application, the activities of these enzymes were appreciably resorted. Among all the antioxidants, the endogenous ASC content decreased to the greatest extent at 45/35°C grown plants indicating its vital role in affecting the response of mungbean to heat stress. Exogenously applied ASC raised its endogenous content along with that of glutathione and proline at 45/35°C. The findings indicated that heat stress-induced inhibition in growth and chlorosis was associated with decrease in leaf water status and elevation of oxidative stress, which could partly be prevented by exogenous application of ASC. Its role in imparting protection against heat stress is discussed.
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