Tannins can slow-down but also speed-up soil enzymatic activity in boreal forest

Adamczyk, Bartosz; Karonen, Maarit; Adamczyk, Sylwia; Engström, Marica T.; Laakso, Tapio; Saranpää, Pekka; Kitunen, Veikko; Smolander, Aino; Simon, Judy

doi:10.1016/j.soilbio.2016.12.027

Cited by 53 publications

(58 citation statements)

References 63 publications

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“…Overall, our results indicate that condensed tannins may not necessarily act as enzyme inhibitors, as was reported in most previous studies, but as enzyme activity modifiers ( Adamczyk et al., , ). The interactions between condensed tannins with enzymes rely on both the structure of tannins and the type of enzymes.…”

Section: Discussionsupporting

confidence: 86%

“…In addition, the more significant inhibition of enzyme activity caused by the light-fraction tannins in our study is probably due to their higher PD:PC ratio in the structure. Because the most crucial feature of tannin-protein complexes is the crosslink of phenolic sites of tannins with proteins (Adamczyk et al, 2017a(Adamczyk et al, , 2017b, and PD monomers bear-2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim www.plant-soil.com ing three hydroxyl groups are more reactive than PC monomers bearing two hydroxyl groups (Hernes et al, 2001), the light-fraction tannins may thus have had stronger interactions with the soil enzymes than the heavy-fraction analogs, which led to the significantly lowered enzyme activity.…”

Section: Responses Of Enzyme Activity To Litter Tanninsmentioning

confidence: 99%

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Net nitrogen mineralization and enzyme activities in an alpine meadow soil amended with litter tannins

Zong

Wang

Qiu

et al. 2018

J. Plant Nutr. Soil Sci.

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Condensed tannins in plant litter play an important role in soil nitrogen (N) cycling at the plant–soil interface. However, how soil net N mineralization is affected by litter tannins through their interactions with soil enzymes remains unclear. The aims of our study are to explore the effects of litter tannins with different structures on soil net N mineralization and on the activities of soil enzymes that are directly or indirectly related to N mineralization. Soils were collected from a Tibetan alpine meadow community dominated by a tannin‐rich forb species, Polygonum viviparum. Condensed tannins purified from the litter were separated into the light‐fraction and heavy‐fraction tannins, with the former having a lower mean degree of polymerization and a higher prodelphinidin:procyanidin (PD:PC) monomer ratio in the structure than the latter. Soils were amended with the light‐fraction, heavy‐fraction, and unfractionated tannins, and then incubated for four weeks. The dynamics of soil enzyme activities and soil net N mineralization were monitored during the incubation. The results show that among the enzyme activities tested, the activities of laccase and peroxidase were significantly inhibited by the three tannins, whereas the activity of polyphenol oxidase was only significantly suppressed by the heavy‐fraction tannins. The overall activity of urease was not significantly affected by the tannin additions. In contrast, the activity of N‐acetyl‐β‐D‐glucosaminidase was significantly enhanced by the three tannins. These results suggest that the interactions between litter tannins and soil enzymes rely on both the structure of the tannins and the type of enzymes. Soil net N mineralization was significantly decreased by the three tannins, which could be attributed to the decreased net ammonification and increased immobilization of inorganic N. The light‐fraction tannins caused a more pronounced inhibitory effect on soil net N mineralization than the heavy‐fraction and unfractionated tannins, probably due to the stronger interaction of the PD monomers with soil enzymes and soil organic N compounds than the PC monomers. Overall, this study indicates that litter tannins with different structures could exert different effects on the activities of soil enzymes as well as on soil net N mineralization, which is important for interpreting the role of different litter tannins in N cycling at the plant–soil interface.

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Section: Discussionsupporting

confidence: 86%

Section: Responses Of Enzyme Activity To Litter Tanninsmentioning

confidence: 99%

Net nitrogen mineralization and enzyme activities in an alpine meadow soil amended with litter tannins

Zong

Wang

Qiu

et al. 2018

J. Plant Nutr. Soil Sci.

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“…This study showed that low concentrations of tannins increased the coiled structures of the enzymes, thereby boosting their catalytic activity . High concentrations of tannins lead to opposite results by diminishing the catalytic activity (see Figure C), although even enzyme–tannin complexes exert some residual activity (Figure B) . The response of enzymes to tannins varied depending on the enzyme .…”

Section: Specific Interaction Of Tannins With Enzymesmentioning

confidence: 82%

“…Moreover, a highly heterogenic incubation study found that tannin‐rich leaves in nylon‐gauze bags in the rumen increased the activity of glutamate ammonia ligase, but no mechanical evidence was provided . Only recently, evidence has been found that enzymatic activity is increased after the reaction with tannins present in low concentrations (Figure A) . This study showed that low concentrations of tannins increased the coiled structures of the enzymes, thereby boosting their catalytic activity .…”

Section: Specific Interaction Of Tannins With Enzymesmentioning

confidence: 87%

Tannins and Their Complex Interaction with Different Organic Nitrogen Compounds and Enzymes: Old Paradigms versus Recent Advances

et al. 2017

Self Cite

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Tannins, an abundant group of plant secondary compounds, raise interest in different fields of science, owing to their unique chemical characteristics. In chemical ecology, tannins play a crucial role in plant defense against pathogens, herbivores, and changing environmental conditions. In the food industry and in medicine, tannins are important because of their proven positive effect on human health and disease treatment. Such wide interests fueled studies on tannin chemistry, especially on their flagship ability to precipitate proteins. In this Review, we expand the basic knowledge on tannin chemistry to the newest insights from the field. We focus especially on tannin reactions with different non‐protein organic N compounds, as well as the complex interactions of tannins with enzymes, resulting in either an increase or decrease in enzyme activity.

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“…Increases in soil enzyme activity, related to soil microbial metabolism, can leads to soil N loss. N-binding agents (especially tannins) have been reported as enzyme inhibitors, so we speculated that the influence of tannins from leaf litter of some species could inhibit mineralization of organic N [30]. Other factors like nitrification and subsequent leaching can be also responsible for soil available N loss [31].…”

Section: Discussionmentioning

confidence: 99%

Soil Degradation and the Decline of Available Nitrogen and Phosphorus in Soils of the Main Forest Types in the Qinling Mountains of China

Zheng

Yuan

Zhang

et al. 2017

Forests

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Soil degradation has been reported worldwide. To better understand this degradation, we selected Pinus armandii and Quercus aliena var. acuteserrata forests, and a mixed forest of Q. aliena var. acuteserrata and P. armandii in the Qinling Mountains in China for our permanent plots and conducted three investigations over a 20-year period. We determined the amounts of available nitrogen (N) and phosphorus (P) in the soil to track the trajectory of soil quality and compared these with stand characteristics, topographic and climatic attributes to analyze the strength of each factor in influencing the available N and P in the soil. We found that the soil experienced a severe drop in quality, and that degradation is continuing. Temperature is the most critical factor controlling the soil available N, and species composition is the main factor regulating the soil available P. Given the huge gap in content and the increasing rate of nutrients loss, this reduction in soil quality will likely negatively affect ecosystem sustainability.

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Tannins can slow-down but also speed-up soil enzymatic activity in boreal forest

Cited by 53 publications

References 63 publications

Net nitrogen mineralization and enzyme activities in an alpine meadow soil amended with litter tannins

Net nitrogen mineralization and enzyme activities in an alpine meadow soil amended with litter tannins

Tannins and Their Complex Interaction with Different Organic Nitrogen Compounds and Enzymes: Old Paradigms versus Recent Advances

Soil Degradation and the Decline of Available Nitrogen and Phosphorus in Soils of the Main Forest Types in the Qinling Mountains of China

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