Publication: Rhizodeposition: An Unseen Teaser of Nature and Its Prospects in Nutrients Dynamics
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Date
2021
Journal Title
Soil Science: Fundamentals to Recent Advances
Journal ISSN
Volume Title
Publisher
Springer Nature
Abstract
Rhizodeposition is defined as all root-derived compounds and plant materials that are released from living roots during plant growth. A wide range of organic compounds are involved in this process, including inorganic ions, sloughed cells, mucilages, exudates and root hairs. Rhizodeposition has diverse functions in plant nutrition and soil ecology, such as improving nutrient availability, acting as allelochemicals, and serving as a carbon and energy source for rhizosphere soil microorganisms. It is mainly quantified through tracer techniques like carbon tracer technique, labeling plants with N15 and dwell labeling technique but, scientific review suggested that cotton wick method is the best technique for quantification. The rhizodeposition plays a crucial role for the mobilization of plant nutrients and serves a complex mixture to carry out ecological functions in the soil. It has been extensively reported that plants invest a large portion of their photosynthetic carbon in the development and maintenance of the rhizosphere through rhizodeposits), which improves the ability to optimally exploit water and nutrient distributions in the soil. Concentration of rhizodeposits has direct effect on C and N mineralization. Different organic acids and phenolic compounds present in rhizodeposition help in increasing different exoenzymes activity, which ultimately increase the mineralization of native, applied and fixed nutrients in soil. Plant root secretes phytosiderophores which improve the micronutrients uptake in plant. In nut shell, through understanding the relationship between rhizodeposits and its function, the insight information of change in microbial diversity and different nutrients transformation process can better understand. � The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021.
Description
Keywords
Allelochemicals, Exoenzymes activity, Rhizodepositions, Tracer techniques