Ellen Dorrepaal — Arctic News — Climate Impacts Research

Ellen Dorrepaal - Umeå universitet

Research output: Contribution to journal › Article Evidence from growth chamber and greenhouse experiments indicates that the rhizosphere priming effect (RPE, stimulation or suppression of soil organic matter (SOM) decomposition by live roots and their rhizospheric biota) may be sensitive to environmental factors such as temperature and level of sunlight. the rhizosphere priming effect (RPE) which is defined as changes in the decomposition rate of soil organic matter (SOM) in response to labile organic carbon input from plant roots. Changes in decomposition of SOM affect nutrient Effects of rhizosphere properties on the rhizosphere priming effect (RPE) are unknown. This study aimed to link species variation in RPE with plant traits and rhizosphere properties. The rhizosphere priming effect (RPE), which occurs in the presence of growing plant roots, may either stimulate or reduce the decomposition of soil organic matter (SOM). Rhizosphere priming effect increases the temperature sensitivity of soil organic matter decomposition. BIAO ZHU. Department of Environmental Studies, University of California, Santa Cruz, CA 95064, USA. Search for more papers by this author.

Although most of the SOC is stored in aggregates with different size classes, the RPE in aggregates and the underlying mechanisms remain unclear. of these rhizosphere interactions is the rhizosphere priming effect (RPE), which is deﬁned as the stimulation or suppression of soil organic matter (SOM)decomposition by live roots and associated rhizosphere organisms when compared to SOM decomposition from rootless soils under the same environmental conditions. One of the contributing factors to this uncertainty is the lack of understanding about the role of rhizosphere priming effect (RPE) in shaping the temperature sensitivity. Using a novel continuous 13 C‐labeling method, we investigated the temperature sensitivity of RPE and its impact on the temperature sensitivity of SOM decomposition. Our results also showed that rhizosphere priming effects on SOM decomposition were positive at all developmental stages in C 3 plant – `C 4 soil' system, but the direction of the rhizosphere priming effect changed at different developmental stages in the C 4 plant – `C 3 soil' system. Implications of rhizosphere priming effects on SOM Rhizosphere interactions play a central role linking roots-soil system and regulate various aspects of nutrient cycling. Rhizodeposition inputs are known to change soil organic matter (SOM) decomposition via rhizosphere priming effects (RPEs) through enhancing soil biological activity and altering microbial community structure.

RPE - Uppsatser.se

Although plant and soil nitrogen (N) are likely to greatly influence RPE and vice-versa, not much is known about these relationships. 2020-11-01 · Plant roots and associated rhizosphere microbes may stimulate or suppress native SOM decomposition, which is termed as the rhizosphere priming effect (RPE) and is an important component of rhizosphere processes (Kuzyakov, 2002; Cheng and Kuzyakov, 2005). Effects of rhizosphere properties on the rhizosphere priming effect (RPE) are unknown. This study aimed to link species variation in RPE with plant traits and rhizosphere properties.

Radioisotopes - Applications in Physical Sciences - Scribd

In the presence of plants, a priming effect occurs in the direct vicinity of the living roots, and it is called rhizosphere priming effect (RPE). Plant‐mediated and environmental factors, such as, plant species, development stage, soil organic matter content, photosynthesis intensity, and N fertilization which affect RPE are reviewed and discussed in this paper. It is now becoming generally recognized that rhizosphere priming effects on SOC decomposition can play important roles in the global carbon cycle (Heimann and Reichstein, 2008, Kuzyakov, 2010, Cheng et al., 2014). The actual mechanisms underlying rhizosphere priming effects still remain elusive (Kuzyakov, 2002, Cheng and Kuzyakov, 2005). Rhizosphere priming may be affected by soil nutrient availability, but rhizosphere priming itself can also affect nutrient supply to plants. These interactive effects may be of particular relevance in understanding the sustained increase in plant growth and nutrient supply in response to a rise in atmospheric CO 2 concentration.

In this meta-analysis, we searched for relevant articles in Web of Science database 3. Results. Across 2009-09-01 · Although the rhizosphere priming effect on SOM decomposition was highly significant for both planted treatments, soil microbial biomass C was not significantly affected by this priming effect . The amounts of soil microbial biomass C were not significantly different between the unplanted control and the planted treatments or between different sampling dates.
Mikael larsson malmö

Soil-derived CO 2–C efﬂux in Search within Search term Abstract Rhizosphere respiration (Rroot) and rhizosphere priming effect (RPE) are crucial for regulating soil carbon dynamics. However, their responses to light intensity are not fully resolved. We investigated Rroot and RPE of soybean and sunflower using a continuous isotope-labeling technique. The two species were subjected to five levels of light intensity in a growth chamber. 2017-08-01 · Rhizosphere priming effect: A meta-analysis 1.

Effects of rhizosphere properties on the rhizosphere priming effect (RPE) are unknown. This study aimed to link species variation in RPE with plant traits and rhizosphere properties. Four C3 species (chickpea, Cicer arietinum; field pea, Pisum sativum; wheat, Triticum aestivum; and white lupin, Lupinus albus) differing in soil acidification and root exudation, were grown in a C4 soil.
Engellau gyllenhammar

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Ellen Dorrepaal — Arctic News — Climate Impacts Research

, 2003 ). The change in native soil organic carbon (SOC) decomposition caused by plant roots or the rhizosphere priming effect (RPE) is a common phenomenon. Although most of the SOC is stored in aggregates with different size classes, the RPE in aggregates and the underlying mechanisms remain unclear. 2020-05-26 2020-11-01 The rhizosphere priming effect (RPE), which occurs in the presence of growing plant roots, may either stimulate or reduce the decomposition of soil organic matter (SOM).