Global patterns and influencing factors of initial concentrations of phenols in plant litter

doi:10.17521/cjpe.2022.0117

Abstract

Abstract:

Aims Phenols are organic components that are resistant to be decomposed during litter decomposition, and their initial content greatly affects the subsequent decomposition process. However, patterns of their initial content in plant litter at the global scale are unclear. In this paper, the content of total phenol and soluble phenol in litter and their response to climate, mycorrhizal association, life forms and soil properties were assessed at the global scale.
Methods Data were collected from published scientific articles before November 5, 2021, the content and influencing factors of total and soluble phenol in plant litter were discussed at the global scale. Among them, 98 articles had total phenol content, covering 350 observations, and 18 articles had soluble phenol content, covering 70 observations. The linear mixed model was used to compare the differences of total phenol and soluble phenol content in root and leaf litter of different functional traits. The linear mixed model was also used to evaluate the effects of different environmental factors on total phenol and soluble phenol content in root and leaf litter. The linear mixed effect model selection method was used to further evaluate the relative importance of influencing variables on the initial total phenol and soluble phenol content in litter.
Important findings Results showed that (1) The average initial total phenolic and soluble phenolic content of the global litter was 65 and 88 mg·g^-1, respectively. (2) Mycorrhizal association had a significant effect on the total phenolic content in root litter and the soluble phenolic content in leaf litter. The total phenolic content in root litter of plants with both arbuscular mycorrhiza and ectomycorrhiza was significantly lower than that in litter of plants with ectomycorrhiza, while the soluble phenolic content in leaf litter of plants associated with both arbuscular mycorrhiza and ectomycorrhiza was significantly higher than that in litter from plants associated with arbuscular mycorrhiza. (3) Phylogenetic types (gymnosperm, angiosperm) and leaf morphology (needleleaf, broadleaf) had significant effects on the total phenolic content in leaf litter, and the total phenolic content in litter of broadleaf and angiosperm plants was significantly higher than that in litter of needleleaf and gymnosperm plants. (4) Average temperature diurnal range, precipitation in the driest month, and precipitation in the driest quarter were significantly positively correlated with the total phenolic content in leaf litter. (5) Precipitation in the warmest quarter and soil moisture were significantly negatively correlated with the content of soluble phenol in leaf litter. (6) Leaf morphology had the most significant effect on total phenolic content in leaf litter. Overall, these results will be useful for understanding the relationships between litter functional traits and phenols and for predicting the decomposition of plant litter under future climate change scenario.

Key words: litter, mycorhiza, leaf morphology, total phenol, soluble phenol, climate

YU Ji-Mei, WU Fu-Zhong, YUAN Ji, JIN Xia, WEI Shu-Yuan, YUAN Chao-Xiang, PENG Yan, NI Xiang-Yin, YUE Kai. Global patterns and influencing factors of initial concentrations of phenols in plant litter[J]. Chin J Plant Ecol, 2023, 47(5): 608-617.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2022.0117

https://www.plant-ecology.com/EN/Y2023/V47/I5/608

Figures/Tables 5

References 48

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环境因子 Environmental factor	叶凋落物总酚含量 Total phenol content in leaf litter			根凋落物总酚含量 Total phenol content in root litter				叶凋落物可溶性酚含量 Soluble phenol content in leaf litter
环境因子 Environmental factor	样本量 Sample size	估计值 Estimated value	p	样本量 Sample size	估计值 Estimated value	p		样本量 Sample size	估计值 Estimated value	p
海拔 Altitude (m)	308	<0.001	0.954	16	0.006	0.099		59	-0.004	0.242
年平均气温 Annual mean air temperature (℃)	330	-0.085	0.403	16	-0.826	0.069		59	0.125	0.618
平均气温日较差 Mean air temperature diurnal range (℃)	330	0.803	0.026*	16	-12.431	0.441		59	1.190	0.205
最热月最高气温 Maximum air temperature of the warmest month (℃)	330	<0.001	0.987	16	-0.877	0.143		59	0.584	0.194
最冷月最低气温 Minimum air temperature of the coldest month (℃)	330	-0.087	0.188	16	-0.547	0.107		59	0.044	0.782
年降水量 Annual precipitation (mm)	330	<0.001	0.239	16	-0.018	0.519		59	-0.002	0.545
最湿月份降水量 Precipitation of the wettest month (mm)	330	0.001	0.916	16	-0.069	0.352		59	0.022	0.395
最干旱月份降水量 Precipitation of the driest month (mm)	330	0.063	0.011^*	16	0.012	0.957		59	-0.067	0.544
最湿季降水量 Precipitation of wettest quarter (mm)	330	<0.001	0.931	16	-0.030	0.365		59	0.007	0.476
最干季降水量 Precipitation of driest quarter (mm)	330	<0.001	0.008^**	16	0.006	0.932		59	-0.015	0.558
最暖季降水量 Precipitation of warmest quarter (mm)	330	0.002	0.661	16	-0.016	0.745		59	-0.029	0.032^*
最冷季降水量 Precipitation of coldest quarter (mm)	330	0.008	0.056	16	0.003	0.963		59	-0.012	0.117
干旱指数 Aridity index	330	<0.001	0.519	16	-0.010	0.361		59	0.003	0.395
土壤含水率 Soil moisture (%)	327	0.069	0.540	16	-1.240	0.373		59	-1.420	<0.001^***
pH	330	-0.708	0.283	16	-7.461		0.083	59	-1.562	0.610
土壤有机碳含量 Soil organic carbon content (g·kg^-1)	330	0.364	0.400	16	1.881		0.509	59	-1.641	0.072
土壤总氮含量 Soil total nitrogen content (g·kg^-1)	324	-0.715	0.555	16	41.293		0.033^*	59	-5.097	0.300
土壤总磷含量 Soil total phosphorus content (g·kg^-1)	199	-3.773	0.439	15	20.591		0.421	51	-2.326	0.553

环境因子 Environmental factor	叶凋落物总酚含量 Total phenol content in leaf litter			根凋落物总酚含量 Total phenol content in root litter				叶凋落物可溶性酚含量 Soluble phenol content in leaf litter
环境因子 Environmental factor	样本量 Sample size	估计值 Estimated value	p	样本量 Sample size	估计值 Estimated value	p		样本量 Sample size	估计值 Estimated value	p
海拔 Altitude (m)	308	<0.001	0.954	16	0.006	0.099		59	-0.004	0.242
年平均气温 Annual mean air temperature (℃)	330	-0.085	0.403	16	-0.826	0.069		59	0.125	0.618
平均气温日较差 Mean air temperature diurnal range (℃)	330	0.803	0.026*	16	-12.431	0.441		59	1.190	0.205
最热月最高气温 Maximum air temperature of the warmest month (℃)	330	<0.001	0.987	16	-0.877	0.143		59	0.584	0.194
最冷月最低气温 Minimum air temperature of the coldest month (℃)	330	-0.087	0.188	16	-0.547	0.107		59	0.044	0.782
年降水量 Annual precipitation (mm)	330	<0.001	0.239	16	-0.018	0.519		59	-0.002	0.545
最湿月份降水量 Precipitation of the wettest month (mm)	330	0.001	0.916	16	-0.069	0.352		59	0.022	0.395
最干旱月份降水量 Precipitation of the driest month (mm)	330	0.063	0.011^*	16	0.012	0.957		59	-0.067	0.544
最湿季降水量 Precipitation of wettest quarter (mm)	330	<0.001	0.931	16	-0.030	0.365		59	0.007	0.476
最干季降水量 Precipitation of driest quarter (mm)	330	<0.001	0.008^**	16	0.006	0.932		59	-0.015	0.558
最暖季降水量 Precipitation of warmest quarter (mm)	330	0.002	0.661	16	-0.016	0.745		59	-0.029	0.032^*
最冷季降水量 Precipitation of coldest quarter (mm)	330	0.008	0.056	16	0.003	0.963		59	-0.012	0.117
干旱指数 Aridity index	330	<0.001	0.519	16	-0.010	0.361		59	0.003	0.395
土壤含水率 Soil moisture (%)	327	0.069	0.540	16	-1.240	0.373		59	-1.420	<0.001^***
pH	330	-0.708	0.283	16	-7.461		0.083	59	-1.562	0.610
土壤有机碳含量 Soil organic carbon content (g·kg^-1)	330	0.364	0.400	16	1.881		0.509	59	-1.641	0.072
土壤总氮含量 Soil total nitrogen content (g·kg^-1)	324	-0.715	0.555	16	41.293		0.033^*	59	-5.097	0.300
土壤总磷含量 Soil total phosphorus content (g·kg^-1)	199	-3.773	0.439	15	20.591		0.421	51	-2.326	0.553