Browsing by Author "Simranjeet Kaur"

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Biochemical and proteomic analysis reveals oxidative stress tolerance strategies of Scenedesmus abundans against allelochemicals released by Microcystis aeruginosa
(Elsevier B.V., 2019) Simranjeet Kaur; Akanksha Srivastava; Sanjiv Kumar; Vaibhav Srivastava; Amrik Singh Ahluwalia; Yogesh Mishra
We studied the possible survival strategies of a green alga, Scenedesmus abundans, against allelochemicals secreted by Microcystis aeruginosa. We exposed the monoculture of S. abundans to a cell free-filtrate (allelochemicals)of M. aeruginosa at the start of our experiment and measured the growth behaviour, morphological changes and oxidative stress markers. The results suggest that exposure to allelochemicals induced oxidative stress in S. abundans, which had significantly reduced the growth of green alga with certain morphological changes. However, after seven days, S. abundans found ways to reduce oxidative stress by recovering its morphology and growth close to that of control. To understand possible survival strategies of test alga, we measured biochemical as well as protein level changes in S. abundans. Biochemical response of the green alga clearly showed that as a response to allelochemicals, enzymatic and non-enzymatic antioxidants were induced. Proteomic analysis showed that exposure to allelochemicals induced accumulation of 13 proteins on the 2-DE gel of S. abundans, which falls in three functional categories, i.e., (i)energy metabolism (photosynthesis, carbon fixation and respiration), (ii)ROS scavenging enzymes and molecular chaperones, and (iii)amino acid and protein biosynthesis. After chronic oxidative stress, these proteins presumably retained glycolysis, pentose phosphate pathway and turnover rate of the Calvin-Benson cycle. Moreover, these proteins assisted in the adequate detoxification of ROS and played an important role in the damage removal and repair of oxidized proteins, lipids and nucleic acids. Therefore, our study anticipates that S. abundans embraces biochemical and proteomic reprogramming to thrives against allelochemicals released by M. aeruginosa. © 2019
Biodiversity and biotechnological applications of rhizomicrobiome for agricultural, environmental and industrial sustainability
(Elsevier, 2024) Divjot Kour; Simranjeet Kaur; Tanvir Kaur; Babita Sharma; Rajeshwari Negi; Sofia Sharief Khan; Imran Sheikh; Damini Maithani; Harpreet Kour; Seema Ramniwas; Sarvesh Rustagi; Ashok Yadav; Neelam Thakur; Ajar Nath Yadav; Amrik Singh Ahluwalia
A century of incremental research along with the technological advances and need for sustainable agricultural practices, the study of beneficial rhizomicrobiomes has increased. Rhizomicrobiomes have emerged as an important and promising tool for sustainable agriculture. These plant associated microbiomes play a major role in plant growth promotion by direct and indirect mechanisms and are generally referred to as plant growth promoting microbes. Plant growth promoting microbes also act as the stress alleviators for plants by increasing the accumulation of the osmolytes, reducing the inhibitory ethylene concentrations and producing reactive oxygen species scavengers. These beneficial microbes can be applied to the plants as biofertilizers and biopesticides to reduce the use of the harmful chemicals as well as for the amelioration of abiotic stresses. The present chapter describes the functional diversity of the rhizomicrobiomes, their agricultural and environmental applications further highlighting their role in industrial sector. © 2025 Elsevier Inc. All rights reserved.
Cyanobacterial blooms and Cyanotoxins: Occurrence and Detection
(Springer Singapore, 2020) Simranjeet Kaur; Akanksha Srivastava; Amrik S. Ahluwalia; Yogesh Mishr
Enormous increase in anthropogenic activities results in nutrient loading into the environment causing eutrophication of aquatic bodies. The increased eutrophication of freshwater and marine water bodies has intensiﬁed the algal growth which is commonly known as algal blooms. Prokaryotic blue green algae/cyanobacteria are one of the most common bloom causing algae in aquatic ecosystem, commonly known as cyanobacterial harmful algal blooms (CHABs). Some cyanobacteria can produce toxins called as cyanotoxins, which not only hinder recreational use of water bodies but also adversely affect microalgae, invertebrates, ﬁsh, birds, plants, and mammals. The current chapters offer an overview of occurrence of CHABs and their toxins. Further, emphasis has been given on types of cyanotoxins, their measurement and removal from aquatic ecosystem. © Springer Nature Singapore Pte Ltd. 2021
Rhizomicrobiome: Biodiversity and functional annotation for agricultural sustainability
(Elsevier, 2024) Sofia Sharief Khan; Babita Sharma; Rajeshwari Negi; Simranjeet Kaur; Tanvir Kaur; Damini Maithani; Imran Sheikh; Harpreet Kour; Seema Ramniwas; Ashok Yadav; Divjot Kour; Neelam Thakur; Ajar Nath Yadav; Shafaq Rasool; Amrik Singh Ahluwalia
The rhizomicrobiome, which consists of a rich and diverse assemblage of microbial organisms, functions analogously to the gut microbiome in the context of the plant genome. This resemblance can be attributed to the presence of microbial communities within the human gut. The habitat in question exhibits exceptional qualities, serving as a refuge for a remarkably diverse microbial community. Even though many studies have revealed the enormous functional versatility of rhizomicrobiome communities, our knowledge of the specific processes underlying the influence of rhizomicrobiome assemblies is still in its infancy. Furthermore, little is understood about the numerous advantageous properties of the rhizomicrobiome. An urgent need arises for a comprehensive and holistic investigation aimed at enhancing our comprehension of the dynamics of microbial communities, specifically the diversity and function of soil microbiomes. This study focuses on exploring this community's diversity and understanding the rhizomicrobiome role as biofertilizers, phytostimulators, stress alleviators, and biocontrol agents. © 2025 Elsevier Inc. All rights reserved.