Details
| Original language | English |
|---|---|
| Pages (from-to) | 507-517 |
| Number of pages | 11 |
| Journal | European Journal of Soil Science |
| Volume | 70 |
| Issue number | 3 |
| Early online date | 8 Nov 2018 |
| Publication status | Published - May 2019 |
Abstract
Ferns are among the most popular groups of plants in the tropics and subtropics, and their role as carbon sequestrators has been widely recognized. However, there is little understanding of the silicaceous structures (phytoliths) of ferns, rate of phytolith turnover, the consequences for organic matter sequestered in phytoliths and consequences for other soil properties. In the study reported here, high-resolution X-ray tomographic microscopy and chemical characterization were applied to examine the traits of phytoliths of the fern Dicranopteris linearis (Burm.f.) Underw. (D. linearis), with a focus on their dissolution properties and accumulation in northern Vietnamese soils in relation to soil properties. Tomographic images revealed an inter-embedding structure of silica and organic matter, especially in leaf-derived material. We propose that organic matter and silica can preserve each other against decomposition. In batch experiments, there was a relatively small rate of dissolution of phytoliths with dry ashing and subsequent H2O2 treatment. Silicon (Si) dissolution for D. linearis phytolith samples was much less than that for rice phytoliths. Despite the fact that the aluminum (Al) content was large in D. linearis leaves, batch dissolution data did not confirm a relation between Al and the slow rate of phytolith dissolution. The soil phytolith content varied from 0.9 to 7.5 g kg−1 in the topsoil across the mountainous areas in northern Vietnam, whereas it tended to be smaller in the subsoil. The data indicate a relation between phytolith and soil organic matter, clay content, oxalate-soluble Al and electrical conductivity, suggesting that these soil properties are among the important factors affecting the size of the soil phytolith Si pool. Highlights: Si tends to accumulate in leaves rather than stems of the fern D. linearis. D. linearis phytoliths showed little dissolution, suggesting their strong stability. OC, EC, clay content and Alox appear as factors ‘feeding’ D. linearis phytoliths. In contrast, Feox and pH did not correlate with D. linearis phytolith content.
Keywords
- accumulation in soils, dissolution properties, phytolith, silicon
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: European Journal of Soil Science, Vol. 70, No. 3, 05.2019, p. 507-517.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fern, Dicranopteris linearis, derived phytoliths in soil
T2 - Morphotypes, solubility and content in relation to soil properties
AU - Nguyen, Minh N.
AU - Meharg, Andy A.
AU - Carey, Manus
AU - Dultz, Stefan
AU - Marone, Federica
AU - Cichy, Sarah B.
AU - Tran, Chinh T.
AU - Le, Giang H.
AU - Mai, Nga T.
AU - Nguyen, Thinh T.H.
PY - 2019/5
Y1 - 2019/5
N2 - Ferns are among the most popular groups of plants in the tropics and subtropics, and their role as carbon sequestrators has been widely recognized. However, there is little understanding of the silicaceous structures (phytoliths) of ferns, rate of phytolith turnover, the consequences for organic matter sequestered in phytoliths and consequences for other soil properties. In the study reported here, high-resolution X-ray tomographic microscopy and chemical characterization were applied to examine the traits of phytoliths of the fern Dicranopteris linearis (Burm.f.) Underw. (D. linearis), with a focus on their dissolution properties and accumulation in northern Vietnamese soils in relation to soil properties. Tomographic images revealed an inter-embedding structure of silica and organic matter, especially in leaf-derived material. We propose that organic matter and silica can preserve each other against decomposition. In batch experiments, there was a relatively small rate of dissolution of phytoliths with dry ashing and subsequent H2O2 treatment. Silicon (Si) dissolution for D. linearis phytolith samples was much less than that for rice phytoliths. Despite the fact that the aluminum (Al) content was large in D. linearis leaves, batch dissolution data did not confirm a relation between Al and the slow rate of phytolith dissolution. The soil phytolith content varied from 0.9 to 7.5 g kg−1 in the topsoil across the mountainous areas in northern Vietnam, whereas it tended to be smaller in the subsoil. The data indicate a relation between phytolith and soil organic matter, clay content, oxalate-soluble Al and electrical conductivity, suggesting that these soil properties are among the important factors affecting the size of the soil phytolith Si pool. Highlights: Si tends to accumulate in leaves rather than stems of the fern D. linearis. D. linearis phytoliths showed little dissolution, suggesting their strong stability. OC, EC, clay content and Alox appear as factors ‘feeding’ D. linearis phytoliths. In contrast, Feox and pH did not correlate with D. linearis phytolith content.
AB - Ferns are among the most popular groups of plants in the tropics and subtropics, and their role as carbon sequestrators has been widely recognized. However, there is little understanding of the silicaceous structures (phytoliths) of ferns, rate of phytolith turnover, the consequences for organic matter sequestered in phytoliths and consequences for other soil properties. In the study reported here, high-resolution X-ray tomographic microscopy and chemical characterization were applied to examine the traits of phytoliths of the fern Dicranopteris linearis (Burm.f.) Underw. (D. linearis), with a focus on their dissolution properties and accumulation in northern Vietnamese soils in relation to soil properties. Tomographic images revealed an inter-embedding structure of silica and organic matter, especially in leaf-derived material. We propose that organic matter and silica can preserve each other against decomposition. In batch experiments, there was a relatively small rate of dissolution of phytoliths with dry ashing and subsequent H2O2 treatment. Silicon (Si) dissolution for D. linearis phytolith samples was much less than that for rice phytoliths. Despite the fact that the aluminum (Al) content was large in D. linearis leaves, batch dissolution data did not confirm a relation between Al and the slow rate of phytolith dissolution. The soil phytolith content varied from 0.9 to 7.5 g kg−1 in the topsoil across the mountainous areas in northern Vietnam, whereas it tended to be smaller in the subsoil. The data indicate a relation between phytolith and soil organic matter, clay content, oxalate-soluble Al and electrical conductivity, suggesting that these soil properties are among the important factors affecting the size of the soil phytolith Si pool. Highlights: Si tends to accumulate in leaves rather than stems of the fern D. linearis. D. linearis phytoliths showed little dissolution, suggesting their strong stability. OC, EC, clay content and Alox appear as factors ‘feeding’ D. linearis phytoliths. In contrast, Feox and pH did not correlate with D. linearis phytolith content.
KW - accumulation in soils
KW - dissolution properties
KW - phytolith
KW - silicon
UR - http://www.scopus.com/inward/record.url?scp=85059477467&partnerID=8YFLogxK
U2 - 10.1111/ejss.12754
DO - 10.1111/ejss.12754
M3 - Article
AN - SCOPUS:85059477467
VL - 70
SP - 507
EP - 517
JO - European Journal of Soil Science
JF - European Journal of Soil Science
SN - 1351-0754
IS - 3
ER -