Overview
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Key numbers
The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:
- Deng et al., 2021; Lima et al., 2021; Xia et al., 2021). However, “plant or herb or woody plant or vegetable or grain” from the
- was enhanced with increasing Se(IV) and Se(VI) exposure dose dataset”, “Rice only”, and “Rice excluded” (Table 1). By analyzing
- published. However, large differences were observed between listed in Table 2, in which the forms of Hg in plant are divided into
- differences between studies (Table 1) (Huedo-Medina et al., 2006).
- plant in the experimental treatment (exogenous Se) and control the analysis (Feng et al., 2010). If the 95% CIs of the two levels did
- assumed that the standard deviation is 1/10 of the mean (Xiang significant (Liao et al., 2008).
- effect size, and 95% confidence interval (95% CIs) (Dieleman et al., PRO 2021. Because the value range of exogenous Se concentration
- significant (p< 0.05), if the 95% CIs did not overlap with 0 (Hedges natural logarithm ln(Se/Hg) (Affholder et al., 2019), and the
- as (R − 1) × 100% (De Graaff et al., 2006). A negative value for the In the process of confirming publication bias, Kendall’s tau rank
- TABLE 1 Heterogeneity test results of datasets. Se (−20.04%), and in non-rice species on Hg accumulation to
- Afterwards, a Rosenthal fail safe number at a = 0.05 was calculated Se(VI) significantly inhibited plant Hg accumulation by −23.08%
- (Rosenthal, 1979). Publication bias can be confirmed only when the and −26.62%, respectively. According to Figure 4B, exogenous Se
- results of the above two rank correlation tests were significant (p< (VI) has a significant inhibitory effect (−26.04%) on Hg
- (where k is the observation number) (Hu et al., 2021). inhibitory effect (−16.55%) on Hg accumulation in rice. According
- significantly inhibited by −28.12% and −28.29% Hg accumulation,
- background Se) is in the range of 0.01–6,335.74 mmol·kg−1/L−1. The Se against the THg accumulation in plant was 25.95%, compared to
- total Hg concentration in growth media (exogenous Hg + 12.42% in MeHg, and to 37.21% in IHg, indicating that exogenous
- background Hg) was in the range of 0–1,179.67 mmol·kg−1/L−1. Se has significantly greater inhibitory effect on IHg accumulation in
- Se/Hg molar ratio was in the range of 0.00–25,404.00, with an plant than on MeHg accumulation (Figure 4A). In rice, exogenous
- was 12.05 ± 155.92 mmol·kg−1. The effect of exogenous Se on Hg (−37.26%) than on MeHg (−12.49%) (Figure 4B).
- accounting for 48.11% (18 papers), 26.82% (13 papers), 13.08% (7 3.4 Se/Hg molar ratio
- (Table S2). Because the experimental background of each group of data is
- responses of overall plant species on Hg accumulation to the overall plant species, when 1< Se/Hg ≤ 3 (−32.67%), Se/Hg > 3
- exogenous Se (−24.22%), on rice Hg accumulation to exogenous (−24.32%), Hg accumulation was significantly reduced (Figure 4A).
- TABLE 2 Categorical variable level and heterogeneity test results.
- For rice, when 1< Se/Hg ≤ 3 (−25.55%), Se/Hg > 3 (−27.83%), Hg BAFStem and BAFGrain are 4.69% and 41.73% significantly, but
- accumulation was significantly reduced (Figure 4B). For non-rice BAFRoot and BAFLeaf are 4.69% and 11.79% non-significantly
- species, when Se/Hg ≤ 1 (−22.32%), 1< Se/Hg ≤ 3 (−38.53%), Se/Hg (Figure 4B). The inhibition rate to non-rice species BAFRoot and
-
3 (−23.29%), Hg accumulation was also significantly BAFGrain is 7.71% and 41.56%, respectively, while the promotion
- lower (Figure 4C). rate to other plant BAFStem and BAFLeaf was 36.74% and 12.02%,
- exogenous Se at the seedling stage decreased by 8.14%, and by
- Some studies reported that the majority of IHg in rice leaf is 26.91% at the mature stage, indicating that the inhibition of
- promotion rate on overall plant BAFStem and BAFLeaf is 23.94% and Hg accumulation by 17.75% at the seedling stage and 34.07% at the
- excluded. The size of the abscissa corresponding to the dot represents the size of its combined effect value, and the error bar represents 95%. The
- TABLE 3 Kendall’s tau and Spearman’s rho rank correlation tests, as well as Rosenthal’s fail-safe numbers for assessing publication bias.
- extent. In addition, Table 3 lists the calculation results of effect of Se and Hg in crops was shown, the mechanisms involved
- species, rice, and non-rice species by 24.22%, 20.04%, and 28.04%, compared with MeHg (Zhang et al., 2010; Rothenberg et al., 2011;
- soil. Thus, the absorption of Hg from soil by plant roots was with previous research results (Tang et al., 2017). Stable Hg isotope
- inhibited. TEM-EDX analysis also confirmed that the molar ratio techniques showed that approximately 20% of Hg in grains was
- In this paper, 1,193 data records were collected from 38 the most suitable soil type and soil humidity, pH, organic
- plant species, rice grains, and non-rice species by 24.22%, 25.26%, preparation, Visualization. SH: Data curation. GB: Writing-
- and 28.04%, respectively. Both Se(IV) and Se(VI) significantly Review and Editing. XZ: Conceptualization, Supervision, Writing-
Methods (brief)
- collected from 38 publications for this meta-analysis, and we tested the effects of
- that the accumulation of total Hg in the root, stem, leaf, and grains data. The data collected in this paper are divided into “Complete
- (Zhao et al., 2020). So far, approximately 40 articles discussing the the collected data, this paper further studies the response of plant
- Table S1 lists a detailed overview of the 38 articles collected in
- In this paper, 1,193 data records were collected from 38 the most suitable soil type and soil humidity, pH, organic
- Feng, Z. Z., Wang, S. G., Szantoic, Z., Chen, S. A., and Wang, X. K. (2010). Protection Mao, J. Y., Pop, V. J., Bath, S. C., Vader, H. L., Redman, C. W. G., and Rayman, M. P.
- Krupp, E. M., Mestrot, A., Wielgus, J., Meharg, A. A., and Feldmann, J. (2009). The Comparing the influence of selenite (Se4+) and selenate (Se6+) on the inhibition of the
Implications
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Update history
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