Influence of Ectomycorrhizal Colonization on Cesium Uptake by <i>Pinus densiflora</i> Seedlings

Ogo, Sumika; Yamanaka, Takashi; Akama, Keiko; Nagakura, Junko; Yamaji, Keiko

doi:10.1080/12298093.2018.1538074

Cited by 9 publications

(5 citation statements)

References 27 publications

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“…Mycorrhiza is an essential factor improving the mineral nutrition, growth, and development of host plants, which can significantly increase the effectiveness of plants in absorbing water and nutrients from the soil 43 , 44 . Sebastiana 45 demonstrated that the rate of Mycorrhizal infection caused different responses to changes in the external environment.…”

Section: Discussionmentioning

confidence: 99%

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Zhao

Nier

Wang

et al. 2023

Sci Rep

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Thinning is an important silvicultural practice for improving the productivity and wood production in plantation forest. Different intensities of thinning management can affect tree growth and alter soil nutrient effectiveness, thus affecting soil fungal community structure and diversity. Our objective is to determine the soil factors and their regulatory mechanisms that influence stand growth by thinning, and to provide data to support the establishment of large diameter timber cultivation technology for Picea koraiensis. In this study, we conducted medium- and high-intensity thinning in 43a P. koraiensis plantation middle-aged forests and investigated the growth indexes, soil physicochemical properties, and fungal community diversity in rhizosphere and non-rhizosphere soils of the stands after thinning at different densities (904 plants/ha for control, 644 plants/ha for 30% thinning intensity, and 477 plants/ha for 50% thinning intensity). The results showed that all growth indicators (annual growth of tree height, diameter at breast height, height under live branches and crown width) of the plantation after high-intensity thinning (477 plants/ha) were higher than those of the control (no thinning, significant) and medium-intensity thinning (644 plants/ha). Mycorrhizal infection rate was higher at the beginning of the growing season than at the end of the growing season, and increased slightly with decreasing stand density. Compared to the control, all medium- and high-intensity thinning treatments significantly improved soil nutrient content (P < 0.05), including total carbon, total nitrogen, total phosphorus, total potassium, Available phosphorus and Available potassium. Fungal diversity was higher but lower in abundance than the control in both rhizosphere and non-rhizosphere soils after thinning. The number of OTUs and fungal richness and diversity indices of non-rhizosphere soil fungi were higher than those of rhizosphere soil fungi. In conclusion, this study provides new evidence that reasonable intercalation can increase the radial and vertical growth of P. koraiensis plantation forests and promote the diversity of subsurface soil fungal communities. It is shown that thinning intensity regulates biogeochemical cycles in P. koraiensis plantation ecosystems by affecting soil nutrients and fungal community structure. Therefore, 50% thinning intensity can be used to increase timber production in plantation forests during large diameter timber cultivation of P. koraiensis and improve predictions associated with achieving long-term forest management strategies.

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Section: Discussionmentioning

confidence: 99%

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Zhao

Nier

Wang

et al. 2023

Sci Rep

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“…With increasing microbial load, respiration will increase 42,43 , inevitably leading to strong priming of SOC. However, this nding contradicts the hypothesis that adding logging residues will increase SOC content; thus, it has been proposed that microorganisms are negatively correlated with SOC compounds at a xed time point, while at a dynamic level, microorganisms are positively correlated with organic carbon compounds 44 . This proposition could explain why our hypothesis about the relationship between residue additions and SOC was not supported.…”

Section: Addition Of Logging Residues Can Increase Soil Carbon Contentmentioning

confidence: 75%

Addition of logging residues short-term affects basic soil parameters and soil organic carbon in six types of urban plantations

Xing

Zhang

Tang

et al. 2023

Preprint

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Different treatments of logging residues can impact on the forest soil carbon pool, but the short-term effects are still unclear. This study aimed to the relationship between the changes of the addition of logging residues and different tree species soil organic carbon content and basic soil parameters. The experimental site was located in Harbin, China, and four logging residue addition levels were set under six forest types, converted to carbon added as 0, 250 (low carbon addition, LC), 500 (medium carbon addition, MC) and 1000 (high carbon addition, HC) g/m2. In the short-term (five months), the logging residues partially decomposed, but the effect on basic soil parameters was small. Soil organic carbon, microbial carbon, and dissolved organic carbon increased significantly in the 0–10 cm soil layer for some tree species, and not significantly in the 10 –20 cm soil layer. There is no consistent relationship between the addition of logging residues and soil parameters under different tree species. That adding logging residues could increase soil carbon pool, there were treespeciesspecific differences in the dynamics of soil processes.

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“…Generally, konara oak forms symbiotic associations with ectomycorrhizal species, whereas Japanese cedar forms associations with arbuscular mycorrhizal species. Incubation experiments on seedlings have suggested that the former fungal species enhance the solubilization of 137 Cs-fixing minerals and root uptake of 137 Cs to a greater degree than do the latter species 56 – 58 . However, not only variations in the impacts of the experimental conditions (e.g., the 137 Cs and K concentrations and their ratio in the soil or solution culture) on the results 58 – 60 , but also completely opposite results—that is, a decline in root uptake 61 —have been reported.…”

Section: Discussionmentioning

confidence: 99%

Radiocesium mobility in different parts of the two major tree species in Fukushima

Manaka

Araki

Ohashi

et al. 2023

Sci Rep

Self Cite

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Radiocesium (137Cs) released in the Fukushima Dai-ichi Nuclear Power Plant accident is still cycling in the forest ecosystem. We examined the mobility of 137Cs in the external parts—leaves/needles, branches, and bark—of the two major tree species in Fukushima, Japanese cedar (Cryptomeria japonica) and konara oak (Quercus serrata). This variable mobility will likely lead to spatial heterogeneity of 137Cs and difficulty in predicting its dynamics for decades. We conducted leaching experiments on these samples by using ultrapure water and ammonium acetate. In Japanese cedar, the 137Cs percentage leached from current-year needles was 26–45% (ultrapure water) and 27–60% (ammonium acetate)—similar to those from old needles and branches. In konara oak, the 137Cs percentage leached from leaves was 47–72% (ultrapure water) and 70–100% (ammonium acetate)—comparable to those from current-year and old branches. Relatively poor 137Cs mobility was observed in the outer bark of Japanese cedar and in organic layer samples from both species. Comparison of the results from corresponding parts revealed greater 137Cs mobility in konara oak than in Japanese cedar. We suggest that more active cycling of 137Cs occurs in konara oak.

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Influence of Ectomycorrhizal Colonization on Cesium Uptake by Pinus densiflora Seedlings

Cited by 9 publications

References 27 publications

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Effects of thinning on soil nutrient availability and fungal community composition in a plantation medium-aged pure forest of Picea koraiensis

Addition of logging residues short-term affects basic soil parameters and soil organic carbon in six types of urban plantations

Radiocesium mobility in different parts of the two major tree species in Fukushima

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