Botany - Research Publications

Permanent URI for this collectionhttps://kr.cup.edu.in/handle/32116/32

Browse

Filter results by typing the first few letters
Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Exogenous application of biostimulants for As stress tolerance in crop plants
    (Elsevier, 2023-08-04T00:00:00) Garg, Tashima; Arora, Bhumika; Bokolia, Muskan; Joshi, Anjali; Kumar, Vinay; Kumar, Avneesh; Kaur, Simranjeet
    Arsenic (As) is a nonessential toxic metalloid existing in two different inorganic forms: arsenite As (III) and arsenate As (V) which cause hindrance in plant developmental processes and are hazardous to human beings. As contamination is a major environmental issue as it stimulates physiological and metabolic dysfunctions, for instance, nutrient and redox imbalance, rate of photosynthesis, and membrane integrity, ultimately leading to reduced crop yield. Plants show detoxification processes to overcome As toxic effects by effluxing excess metal ions through metal transporters, accumulating As in the vacuole, and producing antioxidant enzymes. In recent times, the exogenous application of various biostimulants such as hormones, antioxidants, osmolytes, and others is being explored to combat As-mediating injuries to crop plants. These compounds are effective in improving seed germination, antioxidant enzyme activity, plant biomass, and overall growth of the plants. The objective of this chapter is to provide recent knowledge on the biostimulants hallmarks to alleviate As stress in crop plants. � 2023 Elsevier Inc. All rights reserved.
  • No Thumbnail Available
    Item
    Exogenous application of biostimulants for As stress tolerance in crop plants
    (Elsevier, 2023-08-04T00:00:00) Garg, Tashima; Arora, Bhumika; Bokolia, Muskan; Joshi, Anjali; Kumar, Vinay; Kumar, Avneesh; Kaur, Simranjeet
    Arsenic (As) is a nonessential toxic metalloid existing in two different inorganic forms: arsenite As (III) and arsenate As (V) which cause hindrance in plant developmental processes and are hazardous to human beings. As contamination is a major environmental issue as it stimulates physiological and metabolic dysfunctions, for instance, nutrient and redox imbalance, rate of photosynthesis, and membrane integrity, ultimately leading to reduced crop yield. Plants show detoxification processes to overcome As toxic effects by effluxing excess metal ions through metal transporters, accumulating As in the vacuole, and producing antioxidant enzymes. In recent times, the exogenous application of various biostimulants such as hormones, antioxidants, osmolytes, and others is being explored to combat As-mediating injuries to crop plants. These compounds are effective in improving seed germination, antioxidant enzyme activity, plant biomass, and overall growth of the plants. The objective of this chapter is to provide recent knowledge on the biostimulants hallmarks to alleviate As stress in crop plants. � 2023 Elsevier Inc. All rights reserved.
  • No Thumbnail Available
    Item
    Plant Growth-Promoting Rhizobacteria (PGPR): Approaches to Alleviate Abiotic Stresses for Enhancement of Growth and Development of Medicinal Plants
    (MDPI, 2022-11-22T00:00:00) Kumar, Rahul; Swapnil, Prashant; Meena, Mukesh; Selpair, Shweta; Yadav, Bal Govind
    Plants are constantly exposed to both biotic and abiotic stresses which limit their growth and development and reduce productivity. In order to tolerate them, plants initiate a multitude of stress-specific responses which modulate different physiological, molecular and cellular mechanisms. However, many times the natural methods employed by plants for overcoming the stresses are not sufficient and require external assistance from the rhizosphere. The microbial community in the rhizosphere (known as the rhizomicrobiome) undergoes intraspecific as well as interspecific interaction and signaling. The rhizomicrobiome, as biostimulants, play a pivotal role in stimulating the growth of plants and providing resilience against abiotic stress. Such rhizobacteria which promote the development of plants and increase their yield and immunity are known as PGPR (plant growth promoting rhizobacteria). On the basis of contact, they are classified into two categories, extracellular (in soil around root, root surface and cellular space) and intracellular (nitrogen-fixing bacteria). They show their effects on plant growth directly (i.e., in absence of pathogens) or indirectly. Generally, they make their niche in concentrated form around roots, as the latter exude several nutrients, such as amino acids, lipids, proteins, etc. Rhizobacteria build a special symbiotic relationship with the plant or a section of the plant�s inner tissues. There are free-living PGPRs with the potential to work as biofertilizers. Additionally, studies show that PGPRs can ameliorate the effect of abiotic stresses and help in enhanced growth and development of plants producing therapeutically important compounds. This review focuses on the various mechanisms which are employed by PGPRs to mitigate the effect of different stresses in medicinal plants and enhance tolerance against these stress conditions. � 2022 by the authors.
  • No Thumbnail Available
    Item
    Plant Growth-Promoting Rhizobacteria (PGPR): Approaches to Alleviate Abiotic Stresses for Enhancement of Growth and Development of Medicinal Plants
    (MDPI, 2022-11-22T00:00:00) Kumar, Rahul; Swapnil, Prashant; Meena, Mukesh; Selpair, Shweta; Yadav, Bal Govind
    Plants are constantly exposed to both biotic and abiotic stresses which limit their growth and development and reduce productivity. In order to tolerate them, plants initiate a multitude of stress-specific responses which modulate different physiological, molecular and cellular mechanisms. However, many times the natural methods employed by plants for overcoming the stresses are not sufficient and require external assistance from the rhizosphere. The microbial community in the rhizosphere (known as the rhizomicrobiome) undergoes intraspecific as well as interspecific interaction and signaling. The rhizomicrobiome, as biostimulants, play a pivotal role in stimulating the growth of plants and providing resilience against abiotic stress. Such rhizobacteria which promote the development of plants and increase their yield and immunity are known as PGPR (plant growth promoting rhizobacteria). On the basis of contact, they are classified into two categories, extracellular (in soil around root, root surface and cellular space) and intracellular (nitrogen-fixing bacteria). They show their effects on plant growth directly (i.e., in absence of pathogens) or indirectly. Generally, they make their niche in concentrated form around roots, as the latter exude several nutrients, such as amino acids, lipids, proteins, etc. Rhizobacteria build a special symbiotic relationship with the plant or a section of the plant�s inner tissues. There are free-living PGPRs with the potential to work as biofertilizers. Additionally, studies show that PGPRs can ameliorate the effect of abiotic stresses and help in enhanced growth and development of plants producing therapeutically important compounds. This review focuses on the various mechanisms which are employed by PGPRs to mitigate the effect of different stresses in medicinal plants and enhance tolerance against these stress conditions. � 2022 by the authors.