The Experts below are selected from a list of 10206 Experts worldwide ranked by ideXlab platform
Jingyun Fang - One of the best experts on this subject based on the ideXlab platform.
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Biomass Allocation in response to nitrogen and phosphorus availability insight from experimental manipulations of arabidopsis thaliana
Frontiers in Plant Science, 2019Co-Authors: Anwar Eziz, Di Tian, Xiuping Li, Huiyuan Peng, Jingyun FangAbstract:Allocation of Biomass to different organs is a fundamental aspect of plant responses and adaptations to changing environmental conditions, but how it responds to nitrogen (N) and phosphorus (P) availability remains poorly addressed. Here we conducted greenhouse fertilization experiments using Arabidopsis thaliana, with five levels of N and P additions and eight repeat experiments, to ascertain the effects of N and P availability on Biomass Allocation patterns. N addition increased leaf and stem Allocation, but decreased root and fruit Allocation. P addition increased stem and fruit Allocation, but decreased root and leaf Allocation. Pooled data of the five levels of N addition relative to P addition resulted in lower scaling exponents of stem mass against leaf mass (0.983 vs. 1.226; p = 0.000), fruit mass against vegetative mass (0.875 vs. 1.028; p = 0.000), and shoot mass against root mass (1.069 vs. 1.324; p = 0.001). This suggested that N addition relative to P addition induced slower increase in stem mass with increasing leaf mass, slower increase in reproductive mass with increasing vegetative mass, and slower increase in shoot mass with increasing root mass. Further, the levels of N or P addition did not significantly affect the allometric relationships of stem mass vs. leaf mass, and fruit mass vs. vegetative mass. In contrast, increasing levels of N addition increased the scaling exponent of shoot to root mass, whereas increasing levels of P addition exerted the opposite influence on the scaling exponent. This result suggests that increasing levels of N addition promote Allocation to shoot mass, whereas the increasing levels of P addition promote Allocation to root mass. Our findings highlight that Biomass Allocation of A. thaliana exhibits a contrasting response to N and P availability, which has profound implications for forecasting the Biomass Allocation strategies in plants to human-induced nutrient enrichment.
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drought effect on plant Biomass Allocation a meta analysis
Ecology and Evolution, 2017Co-Authors: Anwar Eziz, Di Tian, Zhiyao Tang, Jingyun FangAbstract:Drought is one of the abiotic stresses controlling plant function and ecological stability. In the context of climate change, drought is predicted to occur more frequently in the future. Despite numerous attempts to clarify the overall effects of drought stress on the growth and physiological processes of plants, a comprehensive evaluation on the impacts of drought stress on Biomass Allocation, especially on reproductive tissues, remains elusive. We conducted a meta-analysis by synthesizing 164 published studies to elucidate patterns of plant Biomass Allocation in relation to drought stress. Results showed that drought significantly increased the fraction of root mass but decreased that of stem, leaf, and reproductive mass. Roots of herbaceous plants were more sensitive to drought than woody plants that reduced reproductive Allocation more sharply than the former. Relative to herbaceous plants, drought had a more negative impact on leaf mass fraction of woody plants. Among the herbaceous plants, roots of annuals responded to drought stress more strongly than perennial herbs, but their reproductive Allocation was less sensitive to drought than the perennial herbs. In addition, cultivated and wild plants seemed to respond to drought stress in a similar way. Drought stress did not change the scaling exponents of the allometric relationship between different plant tissues. These findings suggest that the allometric partitioning theory, rather than the optimal partitioning theory, better explains the drought-induced changes in Biomass Allocation strategies.
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Drought effect on plant Biomass Allocation: A meta‐analysis
Ecology and Evolution, 2017Co-Authors: Anwar Eziz, Di Tian, Zhiyao Tang, Jingyun FangAbstract:Drought is one of the abiotic stresses controlling plant function and ecological stability. In the context of climate change, drought is predicted to occur more frequently in the future. Despite numerous attempts to clarify the overall effects of drought stress on the growth and physiological processes of plants, a comprehensive evaluation on the impacts of drought stress on Biomass Allocation, especially on reproductive tissues, remains elusive. We conducted a meta-analysis by synthesizing 164 published studies to elucidate patterns of plant Biomass Allocation in relation to drought stress. Results showed that drought significantly increased the fraction of root mass but decreased that of stem, leaf, and reproductive mass. Roots of herbaceous plants were more sensitive to drought than woody plants that reduced reproductive Allocation more sharply than the former. Relative to herbaceous plants, drought had a more negative impact on leaf mass fraction of woody plants. Among the herbaceous plants, roots of annuals responded to drought stress more strongly than perennial herbs, but their reproductive Allocation was less sensitive to drought than the perennial herbs. In addition, cultivated and wild plants seemed to respond to drought stress in a similar way. Drought stress did not change the scaling exponents of the allometric relationship between different plant tissues. These findings suggest that the allometric partitioning theory, rather than the optimal partitioning theory, better explains the drought-induced changes in Biomass Allocation strategies.
Anwar Eziz - One of the best experts on this subject based on the ideXlab platform.
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Biomass Allocation in response to nitrogen and phosphorus availability insight from experimental manipulations of arabidopsis thaliana
Frontiers in Plant Science, 2019Co-Authors: Anwar Eziz, Di Tian, Xiuping Li, Huiyuan Peng, Jingyun FangAbstract:Allocation of Biomass to different organs is a fundamental aspect of plant responses and adaptations to changing environmental conditions, but how it responds to nitrogen (N) and phosphorus (P) availability remains poorly addressed. Here we conducted greenhouse fertilization experiments using Arabidopsis thaliana, with five levels of N and P additions and eight repeat experiments, to ascertain the effects of N and P availability on Biomass Allocation patterns. N addition increased leaf and stem Allocation, but decreased root and fruit Allocation. P addition increased stem and fruit Allocation, but decreased root and leaf Allocation. Pooled data of the five levels of N addition relative to P addition resulted in lower scaling exponents of stem mass against leaf mass (0.983 vs. 1.226; p = 0.000), fruit mass against vegetative mass (0.875 vs. 1.028; p = 0.000), and shoot mass against root mass (1.069 vs. 1.324; p = 0.001). This suggested that N addition relative to P addition induced slower increase in stem mass with increasing leaf mass, slower increase in reproductive mass with increasing vegetative mass, and slower increase in shoot mass with increasing root mass. Further, the levels of N or P addition did not significantly affect the allometric relationships of stem mass vs. leaf mass, and fruit mass vs. vegetative mass. In contrast, increasing levels of N addition increased the scaling exponent of shoot to root mass, whereas increasing levels of P addition exerted the opposite influence on the scaling exponent. This result suggests that increasing levels of N addition promote Allocation to shoot mass, whereas the increasing levels of P addition promote Allocation to root mass. Our findings highlight that Biomass Allocation of A. thaliana exhibits a contrasting response to N and P availability, which has profound implications for forecasting the Biomass Allocation strategies in plants to human-induced nutrient enrichment.
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drought effect on plant Biomass Allocation a meta analysis
Ecology and Evolution, 2017Co-Authors: Anwar Eziz, Di Tian, Zhiyao Tang, Jingyun FangAbstract:Drought is one of the abiotic stresses controlling plant function and ecological stability. In the context of climate change, drought is predicted to occur more frequently in the future. Despite numerous attempts to clarify the overall effects of drought stress on the growth and physiological processes of plants, a comprehensive evaluation on the impacts of drought stress on Biomass Allocation, especially on reproductive tissues, remains elusive. We conducted a meta-analysis by synthesizing 164 published studies to elucidate patterns of plant Biomass Allocation in relation to drought stress. Results showed that drought significantly increased the fraction of root mass but decreased that of stem, leaf, and reproductive mass. Roots of herbaceous plants were more sensitive to drought than woody plants that reduced reproductive Allocation more sharply than the former. Relative to herbaceous plants, drought had a more negative impact on leaf mass fraction of woody plants. Among the herbaceous plants, roots of annuals responded to drought stress more strongly than perennial herbs, but their reproductive Allocation was less sensitive to drought than the perennial herbs. In addition, cultivated and wild plants seemed to respond to drought stress in a similar way. Drought stress did not change the scaling exponents of the allometric relationship between different plant tissues. These findings suggest that the allometric partitioning theory, rather than the optimal partitioning theory, better explains the drought-induced changes in Biomass Allocation strategies.
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Drought effect on plant Biomass Allocation: A meta‐analysis
Ecology and Evolution, 2017Co-Authors: Anwar Eziz, Di Tian, Zhiyao Tang, Jingyun FangAbstract:Drought is one of the abiotic stresses controlling plant function and ecological stability. In the context of climate change, drought is predicted to occur more frequently in the future. Despite numerous attempts to clarify the overall effects of drought stress on the growth and physiological processes of plants, a comprehensive evaluation on the impacts of drought stress on Biomass Allocation, especially on reproductive tissues, remains elusive. We conducted a meta-analysis by synthesizing 164 published studies to elucidate patterns of plant Biomass Allocation in relation to drought stress. Results showed that drought significantly increased the fraction of root mass but decreased that of stem, leaf, and reproductive mass. Roots of herbaceous plants were more sensitive to drought than woody plants that reduced reproductive Allocation more sharply than the former. Relative to herbaceous plants, drought had a more negative impact on leaf mass fraction of woody plants. Among the herbaceous plants, roots of annuals responded to drought stress more strongly than perennial herbs, but their reproductive Allocation was less sensitive to drought than the perennial herbs. In addition, cultivated and wild plants seemed to respond to drought stress in a similar way. Drought stress did not change the scaling exponents of the allometric relationship between different plant tissues. These findings suggest that the allometric partitioning theory, rather than the optimal partitioning theory, better explains the drought-induced changes in Biomass Allocation strategies.
J S Coleman - One of the best experts on this subject based on the ideXlab platform.
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Biomass Allocation in old-field annual species grown in elevated CO2 environments: no evidence for optimal partitioning.
Global Change Biology, 2000Co-Authors: Carl J. Bernacchi, J S Coleman, Fakhri A. Bazzaz, K. D.m. McconnaughayAbstract:Summary Increased atmospheric carbon dioxide supply is predicted to alter plant growth and Biomass Allocation patterns. It is not clear whether changes in Biomass Allocation reflect optimal partitioning or whether they are a direct effect of increased growth rates. Plasticity in growth and Biomass Allocation patterns was investigated at two concentrations of CO2 ([CO2]) and at limiting and nonlimiting nutrient levels for four fast- growing old-field annual species. Abutilon theophrasti, Amaranthus retroflexus, Chenopodium album, and Polygonum pensylvanicum were grown from seed in controlled growth chamber conditions at current (350 μmol mol−1, ambient) and future- predicted (700 μmol mol−1, elevated) CO2 levels. Frequent harvests were used to determine growth and Biomass Allocation responses of these plants throughout vegetative development. Under nonlimiting nutrient conditions, whole plant growth was increased greatly under elevated [CO2] for three C3 species and moderately increased for a C4 species (Amaranthus). No significant increases in whole plant growth were observed under limiting nutrient conditions. Plants grown in elevated [CO2] had lower or unchanged root:shoot ratios, contrary to what would be expected by optimal partitioning theory. These differences disappeared when allometric plots of the same data were analysed, indicating that CO2-induced differences in root:shoot Allocation were a consequence of accelerated growth and development rates. Allocation to leaf area was unaffected by atmospheric [CO2] for these species. The general lack of Biomass Allocation responses to [CO2] availability is in stark contrast with known responses of these species to light and nutrient gradients. We conclude that Biomass Allocation responses to elevated atmospheric [CO2] are not consistent with optimal partitioning predictions.
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Biomass Allocation in plants: Ontogeny or optimality? A test along three resource gradients
Ecology, 1999Co-Authors: K. D.m. Mcconnaughay, J S ColemanAbstract:We examined Biomass Allocation patterns throughout the entire vegetative growth phase for three species of annual plants along three separate gradients of resource availability to determine whether observed patterns of Allocational plasticity are consistent with optimal partitioning theory. Individuals of the annual plant species Abutilon theo- phrasti, Chenopodium album, and Polygonum pensylvanicum were grown from locally field- gathered seed in controlled greenhouse conditions across gradients of light, nutrients, and water. Frequent harvests were used to determine the growth and Allocation (root vs. shoot, and leaf area vs. Biomass) responses of these plants over a 57-d period. Growth analysis revealed that each species displayed significant plasticity in growth rates and substantial amounts of ontogenetic drift in root : shoot Biomass ratios and ratios of leaf area to Biomass across each of the three resource gradients. Ontogenetically controlled comparisons of root : shoot and leaf area ratios across light and nutrient gradients were generally consistent with predictions based on optimal partitioning theory; Allocation to roots decreased and leaf area increased under low light and high nutrient conditions. These trends were confirmed, though were less dramatic, in allometric plots of Biomass Allocation throughout ontogeny. These species did not alter Biomass Allocation (beyond ontogenetic drift) in response to the broadly varying water regimes. Furthermore, many of the observed differences in Biomass Allocation were limited to a given time during growth and development. We conclude that, for these rapidly growing annual species, plasticity in Biomass al- location patterns is only partially consistent with optimal partitioning theory, and that these plastic responses are ontogenetically constrained. Further, while these species did adjust Biomass Allocation patterns in response to light and nutrient availability, they did not adjust Biomass Allocation in response to water availability, despite dramatic plasticity in growth rates along all three resource gradients. Our results support a developmentally explicit model of plasticity in Biomass Allocation in response to limiting resources.
Di Tian - One of the best experts on this subject based on the ideXlab platform.
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Biomass Allocation in response to nitrogen and phosphorus availability insight from experimental manipulations of arabidopsis thaliana
Frontiers in Plant Science, 2019Co-Authors: Anwar Eziz, Di Tian, Xiuping Li, Huiyuan Peng, Jingyun FangAbstract:Allocation of Biomass to different organs is a fundamental aspect of plant responses and adaptations to changing environmental conditions, but how it responds to nitrogen (N) and phosphorus (P) availability remains poorly addressed. Here we conducted greenhouse fertilization experiments using Arabidopsis thaliana, with five levels of N and P additions and eight repeat experiments, to ascertain the effects of N and P availability on Biomass Allocation patterns. N addition increased leaf and stem Allocation, but decreased root and fruit Allocation. P addition increased stem and fruit Allocation, but decreased root and leaf Allocation. Pooled data of the five levels of N addition relative to P addition resulted in lower scaling exponents of stem mass against leaf mass (0.983 vs. 1.226; p = 0.000), fruit mass against vegetative mass (0.875 vs. 1.028; p = 0.000), and shoot mass against root mass (1.069 vs. 1.324; p = 0.001). This suggested that N addition relative to P addition induced slower increase in stem mass with increasing leaf mass, slower increase in reproductive mass with increasing vegetative mass, and slower increase in shoot mass with increasing root mass. Further, the levels of N or P addition did not significantly affect the allometric relationships of stem mass vs. leaf mass, and fruit mass vs. vegetative mass. In contrast, increasing levels of N addition increased the scaling exponent of shoot to root mass, whereas increasing levels of P addition exerted the opposite influence on the scaling exponent. This result suggests that increasing levels of N addition promote Allocation to shoot mass, whereas the increasing levels of P addition promote Allocation to root mass. Our findings highlight that Biomass Allocation of A. thaliana exhibits a contrasting response to N and P availability, which has profound implications for forecasting the Biomass Allocation strategies in plants to human-induced nutrient enrichment.
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drought effect on plant Biomass Allocation a meta analysis
Ecology and Evolution, 2017Co-Authors: Anwar Eziz, Di Tian, Zhiyao Tang, Jingyun FangAbstract:Drought is one of the abiotic stresses controlling plant function and ecological stability. In the context of climate change, drought is predicted to occur more frequently in the future. Despite numerous attempts to clarify the overall effects of drought stress on the growth and physiological processes of plants, a comprehensive evaluation on the impacts of drought stress on Biomass Allocation, especially on reproductive tissues, remains elusive. We conducted a meta-analysis by synthesizing 164 published studies to elucidate patterns of plant Biomass Allocation in relation to drought stress. Results showed that drought significantly increased the fraction of root mass but decreased that of stem, leaf, and reproductive mass. Roots of herbaceous plants were more sensitive to drought than woody plants that reduced reproductive Allocation more sharply than the former. Relative to herbaceous plants, drought had a more negative impact on leaf mass fraction of woody plants. Among the herbaceous plants, roots of annuals responded to drought stress more strongly than perennial herbs, but their reproductive Allocation was less sensitive to drought than the perennial herbs. In addition, cultivated and wild plants seemed to respond to drought stress in a similar way. Drought stress did not change the scaling exponents of the allometric relationship between different plant tissues. These findings suggest that the allometric partitioning theory, rather than the optimal partitioning theory, better explains the drought-induced changes in Biomass Allocation strategies.
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Drought effect on plant Biomass Allocation: A meta‐analysis
Ecology and Evolution, 2017Co-Authors: Anwar Eziz, Di Tian, Zhiyao Tang, Jingyun FangAbstract:Drought is one of the abiotic stresses controlling plant function and ecological stability. In the context of climate change, drought is predicted to occur more frequently in the future. Despite numerous attempts to clarify the overall effects of drought stress on the growth and physiological processes of plants, a comprehensive evaluation on the impacts of drought stress on Biomass Allocation, especially on reproductive tissues, remains elusive. We conducted a meta-analysis by synthesizing 164 published studies to elucidate patterns of plant Biomass Allocation in relation to drought stress. Results showed that drought significantly increased the fraction of root mass but decreased that of stem, leaf, and reproductive mass. Roots of herbaceous plants were more sensitive to drought than woody plants that reduced reproductive Allocation more sharply than the former. Relative to herbaceous plants, drought had a more negative impact on leaf mass fraction of woody plants. Among the herbaceous plants, roots of annuals responded to drought stress more strongly than perennial herbs, but their reproductive Allocation was less sensitive to drought than the perennial herbs. In addition, cultivated and wild plants seemed to respond to drought stress in a similar way. Drought stress did not change the scaling exponents of the allometric relationship between different plant tissues. These findings suggest that the allometric partitioning theory, rather than the optimal partitioning theory, better explains the drought-induced changes in Biomass Allocation strategies.
Xianzhou Zhang - One of the best experts on this subject based on the ideXlab platform.
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effects of grazing on above vs below ground Biomass Allocation of alpine grasslands on the northern tibetan plateau
PLOS ONE, 2015Co-Authors: Chaoxu Zeng, Jianshuang Wu, Xianzhou ZhangAbstract:Biomass Allocation is an essential concept for understanding above- vs. below-ground functions and for predicting the dynamics of community structure and ecosystem service under ongoing climate change. There is rare available knowledge of grazing effects on Biomass Allocation in multiple zonal alpine grassland types along climatic gradients across the Northern Tibetan Plateau. We collected the peak above- and below-ground Biomass (AGB and BGB) values at 106 pairs of well-matched grazed vs. fenced sites during summers of 2010–2013, of which 33 pairs were subject to meadow, 52 to steppe and 21 to desert-steppe. The aboveground net primary productivity (ANPP) was represented by the peak AGB while the belowground net primary productivity (BNPP) was estimated from ANPP, the ratio of living vs. dead BGB, and the root turnover rate. Two-ways analyses of variance (ANOVA) and paired samples comparisons with t-test were applied to examine the effects of pasture managements (PMS, i.e., grazed vs. fenced) and zonal grassland types on both ANPP and BNPP. Allometric and isometric Allocation hypotheses were also tested between logarithmically transformed ANPP and BNPP using standardized major axis (SMA) analyses across grazed, fenced and overall sites. In our study, a high community-dependency was observed to support the allometric Biomass Allocation hypothesis, in association with decreased ANPP and a decreasing-to-increasing BNPP proportions with increasing aridity across the Northern Tibetan Plateau. Grazing vs. fencing seemed to have a trivial effect on ANPP compared to the overwhelming influence of different zonal grassland types. Vegetation links above- and below-ground ecological functions through integrated meta-population adaptive strategies to the increasing severity of habitat conditions. Therefore, more detailed studies on functional diversity are essentially to achieve conservation and sustainability goals under ongoing climatic warming and intensifying human influences.
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changes in individual plant traits and Biomass Allocation in alpine meadow with elevation variation on the qinghai tibetan plateau
Science China-life Sciences, 2010Co-Authors: Wenhua Li, Yongtao He, Xianzhou Zhang, Zhenxi Shen, Siyue ChaiAbstract:Plant traits and individual plant Biomass Allocation of 57 perennial herbaceous species, belonging to three common functional groups (forbs, grasses and sedges) at subalpine (3700 m ASL), alpine (4300 m ASL) and subnival (⩾5000 m ASL) sites were examined to test the hypothesis that at high altitudes, plants reduce the proportion of aboveground parts and allocate more Biomass to belowground parts, especially storage organs, as altitude increases, so as to geminate and resist environmental stress. However, results indicate that some divergence in Biomass Allocation exists among organs. With increasing altitude, the mean fractions of total Biomass allocated to aboveground parts decreased. The mean fractions of total Biomass Allocation to storage organs at the subalpine site (7%±2% S.E.) were distinct from those at the alpine (23%±6%) and subnival (21%±6%) sites, while the proportions of green leaves at all altitudes remained almost constant. At 4300 m and 5000 m, the mean fractions of flower stems decreased by 45% and 41%, respectively, while fine roots increased by 86% and 102%, respectively. Specific leaf areas and leaf areas of forbs and grasses deceased with rising elevation, while sedges showed opposite trends. For all three functional groups, leaf area ratio and leaf area root mass ratio decreased, while fine root Biomass increased at higher altitudes. Biomass Allocation patterns of alpine plants were characterized by a reduction in aboveground reproductive organs and enlargement of fine roots, while the proportion of leaves remained stable. It was beneficial for high altitude plants to compensate carbon gain and nutrient uptake under low temperature and limited nutrients by stabilizing Biomass investment to photosynthetic structures and increasing the absorption surface area of fine roots. In contrast to forbs and grasses that had high mycorrhizal infection, sedges had higher single leaf area and more root fraction, especially fine roots.
