Nitrogen, water, and phosphorus uptake as functions of fine-root mass in greenhouse microcosms of Poa pratensis

Dybzinski, Ray; Taylor, Natalie; Prosser, Megan; Niosi, Olivia; Demo, Madeline; Kilbane, Erin

doi:10.1007/s11258-021-01155-z

Cited by 2 publications

(3 citation statements)

References 70 publications

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“…Increased carbon fixation does not invariably promote plant growth; NSC transported from leaves changes root morphological and physiological traits (Prescott et al ., 2020). Root traits that incur different carbon costs responded differently to P status, feeding back to changes in PUR (Dybzinski et al ., 2021). Leymus chinensis and C. squarrosa balanced their functional traits to acclimate to heterogeneous P availability (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Total plant P content equaled the aboveground biomass × aboveground [P] + belowground‐biomass × belowground [P]. Phosphorus uptake is a function of the fine‐root mass (Dybzinski et al ., 2021). We determined the P‐uptake rate (PUR) as:

PUR = \frac{plant P content (in August) - plant P content (in July)}{average fine root mass (Fresh) \times 30}

where plant P (in August) and plant P (in July) represents the total plant content of L. chinensis and C. squarrosa individual sampled on 8 August and 9 July; average fine‐root mass (Fresh) represents the mean value of fresh weight of fine root in July and August of L. chinensis and C. squarrosa individual, and 30 represents the time interval.…”

Section: Methodsmentioning

confidence: 99%

“…When plant growth is constrained by soil P availability, a surplus of nonstructural carbohydrates (NSC) is exported from leaves to other organs; NSC allocated to roots may trigger changes in root morphology and physiology (Prescott et al ., 2020). The benefits and carbon costs of these changes depend on soil P availability, and there appear to be trade‐offs between plant growth and P uptake, potentially resulting in different root P‐uptake rate (PUR) and net photosynthetic rate ( P n ), ultimately forming a plant–soil feedback system (Dybzinski et al ., 2021; Wen et al ., 2021). Moderate P fertilization is favorable for coordination of biomass accumulation and P uptake (Shi et al ., 2021).…”

Section: Introductionmentioning

confidence: 99%

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Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C₃ and C₄ species in a typical temperate grassland of Northern China

Zhang,

Gong,

Zhang

et al. 2023

New Phytologist

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Summary Phosphorus (P) fertilization can alleviate a soil P deficiency in grassland ecosystems. Understanding plant functional traits that enhance P uptake can improve grassland management. We measured impacts of P addition on soil chemical and microbial properties, net photosynthetic rate (Pn) and nonstructural carbohydrate concentrations ([NSC]), and root P‐uptake rate (PUR), morphology, anatomy, and exudation of two dominant grass species: Leymus chinensis (C3) and Cleistogenes squarrosa (C4). For L. chinensis, PUR and Pn showed a nonlinear correlation. Growing more adventitious roots compensated for the decrease in P transport per unit root length, so that it maintained a high PUR. For C. squarrosa, PUR and Pn presented a linear correlation. Increased Pn was associated with modifications in root morphology, which further enhanced its PUR and a greater surplus of photosynthate and significantly stimulated root exudation (proxied by leaf [Mn]), which had a greater impact on rhizosheath micro‐environment and microbial PLFAs. Our results present correlations between the PUR and the Pn of L. chinensis and C. squarrosa and reveal that NSC appeared to drive the modifications of root morphology and exudation; they provide more objective basis for more efficient P‐input in grasslands to address the urgent problem of P deficiency.

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Section: Discussionmentioning

confidence: 99%

PUR = \frac{plant P content (in August) - plant P content (in July)}{average fine root mass (Fresh) \times 30}

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C₃ and C₄ species in a typical temperate grassland of Northern China

Zhang,

Gong,

Zhang

et al. 2023

New Phytologist

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Changes in Water Utilization Characteristics of Trees in Forests across a Successional Gradient in Southern China

Gao,

Xu,

Zuo

et al. 2024

Forests

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Elucidating the water utilization strategy of trees during forest succession is a prerequisite for predicting the direction of forest succession. However, the water utilization characteristics of trees in forests across a successional gradient remain unclear. Here, we utilized the hydrogen and oxygen stable isotopes combined with the Bayesian mixed model (MixSIAR) to analyze the water utilization of dominant trees (Pinus massoniana, Castanea henryi, and Schima superba) in forests along a successional gradient in the Dinghushan Biosphere Reserve of China. Furthermore, we determined the primary factor affecting the water utilization of various trees based on variation partitioning analysis and a random forest model. Our results illustrated that in the early-successional forest, the water utilization ratios from shallow soil layers by P. massoniana were significantly lower than that in the mid-successional forest (51.3%–61.7% vs. 75.3%–81.4%), while its water utilization ratios from deep soil layers exhibited the opposite pattern (26.1%–30.1% vs. 9.0%–15.0%). Similarly, the ratios of water utilization from shallow soil layers by C. henryi (18.9%–29.5% vs. 32.4%–45.9%) and S. superba (10.0%–25.7% vs. 29.2%–66.4%) in the mid-successional forest were relatively lower than in the late-successional forest, whereas their water utilization ratios from deep soil layers showed the contrary tendency. Moreover, our results demonstrated that the diverse water utilization of each tree in different successional forests was mainly attributed to their distinct plant properties. Our findings highlight the increased percentage of water utilization of trees from shallow soil layers with forest succession, providing new insights for predicting the direction of forest succession under changing environments.

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Nitrogen, water, and phosphorus uptake as functions of fine-root mass in greenhouse microcosms of Poa pratensis

Cited by 2 publications

References 70 publications

Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C₃ and C₄ species in a typical temperate grassland of Northern China

Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C₃ and C₄ species in a typical temperate grassland of Northern China

Changes in Water Utilization Characteristics of Trees in Forests across a Successional Gradient in Southern China

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Nitrogen, water, and phosphorus uptake as functions of fine-root mass in greenhouse microcosms of Poa pratensis

Cited by 2 publications

References 70 publications

Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C3 and C4 species in a typical temperate grassland of Northern China

Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C3 and C4 species in a typical temperate grassland of Northern China

Changes in Water Utilization Characteristics of Trees in Forests across a Successional Gradient in Southern China

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Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C₃ and C₄ species in a typical temperate grassland of Northern China

Soil phosphorus availability alters the correlations between root phosphorus‐uptake rates and net photosynthesis of dominant C₃ and C₄ species in a typical temperate grassland of Northern China