The community‐level scaling relationship between leaf nitrogen and phosphorus changes with plant growth, climate and nutrient limitation

Yong, Guo; Yan, Zhengbing; Gheyret, Gheyur; Zhou, Guoyi; Xie, Zongqiang; Tang, Zhiyao

doi:10.1111/1365-2745.13369

Cited by 45 publications

(15 citation statements)

References 57 publications

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“…Therefore, in the desert with less precipitation, longer dry-period, and deficient soil nutrient in Central Asia, in order to complete their life cycle in a short time (generally less than two months), ephemeral plants must retain high N concentration in their leaves to cope with environmental stress and retain high P allocation rate to maintain normal physiological metabolism and growth. These results well confirm the environmental stress-growth rate hypothesis (Ågren and Weih 2020;Guo et al 2020;Tian et al 2018;Wang et al 2019a).…”

Section: Relationships Of N P and N:p In Leaves And Roots In Desert Areassupporting

confidence: 86%

“…and vegetation types. It is generally believed that relatively strong environmental stress leads to the decrease of growth rate and the increase of N-P scaling exponent; on the contrary, if plants do not feel stress, their growth rate will be faster, resulting in low N-P scaling exponent (Ågren and Weih 2020;Guo et al 2020;Tian et al 2018;Wang et al 2019a). This result suggests that low N-P scaling exponent of ephemeral plants is consistent with their rapid growth.…”

Section: Relationships Of N P and N:p In Leaves And Roots In Desert Areasmentioning

confidence: 99%

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Leaf-root-soil N:P stoichiometry of ephemeral plants in a temperate desert in Central Asia

et al. 2021

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Ephemeral plants are a crucial vegetation component in temperate deserts of Central Asia, and play an important role in biogeochemical cycle and biodiversity maintenance in desert ecosystems. However, the nitrogen (N) and phosphorus (P) status and interrelations of leaf-root-soil of ephemeral plants remain unclear. A total of 194 leaf-root-soil samples of eight ephemeral species at 37 sites in the Gurbantunggut Desert, China were collected, and then the corresponding N and P concentrations, and the N:P ratio were measured. Results showed that soil parameters presented no significant difference among the eight species. The total soil N:P was only 0.116 (geomean), indicating limited soil N, while the available soil N:P (4.896, geomean) was significantly larger than the total N:P. The leaf N (averagely 30.995 mg g −1 ) and P (averagely 1.523 mg g −1 ) concentrations were 2.64-8.46 and 0.93-3.99 times higher than the root N (averagely 8.014 mg g −1 ) and P (averagely 0.802 mg g −1 ) concentrations, respectively. Thus, leaf N:P (averagely 21.499) was 1.410-2.957 times higher than root N:P (averagely 11.803). Meanwhile, significant interspecific differences existed in plant stoichiometric traits. At the across-species level, N content scaled as the 3/4-power of P content in both leaves and roots. Leaf and root N:P ratios were mainly influenced by P; however, the leaf-to-root N or P ratio was dominated by roots. Leaf and root N, P contents and N:P were generally unrelated to soil nutrients, and the former presented lower variation than the latter, indicating a strong stoichiometric homeostasis for ephemerals. These results demonstrate that regardless of soil nutrient supply capacity in this region, the fast-growing ephemeral plants have formed a specific leaf-root-soil stoichiometric relation and nutrient use strategy adapting to the extreme desert environment.

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Section: Relationships Of N P and N:p In Leaves And Roots In Desert Areassupporting

confidence: 86%

Section: Relationships Of N P and N:p In Leaves And Roots In Desert Areasmentioning

confidence: 99%

Leaf-root-soil N:P stoichiometry of ephemeral plants in a temperate desert in Central Asia

et al. 2021

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“…LDMC indicates the leaf water content, storage capacity and strategies for distributing nutrients and substances (Hodgson et al 2011). N and P are important elements that affect plant metabolism, energy transmission and ecological processes (Abdala- Roberts et al 2018;Guo et al 2020).…”

Section: Leaf Trait Measurementsmentioning

confidence: 99%

Effects of ontogenetic stage and leaf age on leaf functional traits and the relationships between traits in Pinus koraiensis

Jin

Liu

2021

J. For. Res.

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Investigating the effects of ontogenetic stage and leaf age on leaf traits is important for understanding the utilization and distribution of resources in the process of plant growth. However, few studies have been conducted to show how traits and trait-trait relationships change across a range of ontogenetic stage and leaf age for evergreen coniferous species. We divided 67 Pinus koraiensis Sieb. et Zucc. of various sizes (0.3–100 cm diameter at breast height, DBH) into four ontogenetic stages, i.e., young trees, middle-aged trees, mature trees and over-mature trees, and measured the leaf mass per area (LMA), leaf dry matter content (LDMC), and mass-based leaf nitrogen content (N) and phosphorus content (P) of each leaf age group for each sampled tree. One-way analysis of variance (ANOVA) was used to describe the variation in leaf traits by ontogenetic stage and leaf age. The standardized major axis method was used to explore the effects of ontogenetic stage and leaf age on trait-trait relationships. We found that LMA and LDMC increased significantly and N and P decreased significantly with increases in the ontogenetic stage and leaf age. Most trait-trait relationships were consistent with the leaf economic spectrum (LES) at a global scale. Among them, leaf N content and LDMC showed a significant negative correlation, leaf N and P contents showed a significant positive correlation, and the absolute value of the slopes of the trait-trait relationships showed a gradually increasing trend with an increasing ontogenetic stage. LMA and LDMC showed a significant positive correlation, and the slopes of the trait-trait relationships showed a gradually decreasing trend with leaf age. Additionally, there were no significant relationships between leaf N content and LMA in most groups, which is contrary to the expectation of the LES. Overall, in the early ontogenetic stages and leaf ages, the leaf traits tend to be related to a "low investment-quick returns" resource strategy. In contrast, in the late ontogenetic stages and leaf ages, they tend to be related to a "high investment-slow returns" resource strategy. Our results reflect the optimal allocation of resources in Pinus koraiensis according to its functional needs during tree and leaf ontogeny.

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“…It was reported that the strong stoichiometric relationships between plant nutrients and their ratios could be quantified by a power function as i = βj α , where i and j indicate plant nutrient concentrations and their ratios, respectively; α and β indicate the scaling exponent and normalization constant, which are the slope and the "elevation" or Y-intercept of the log-log linear i vs. j regression line, respectively (Wright et al, 2004;Reich et al, 2010;Tian et al, 2018). The scaling exponent α was widely applied to quantified the stoichiometric relationship between N and P across species under multiple nutrient environments (Tian et al, 2019;Guo et al, 2020;Zhao et al, 2021). However, limited studies focus on the scaling exponent related to C and K.…”

Section: Introductionmentioning

confidence: 99%

Effect of Wetland Restoration and Degradation on Nutrient Trade-Off of Carex schmidtii

et al. 2022

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Plant nutrient trade-off, a growth strategy, regulates nutrient stoichiometry, allocation and stoichiometric relationships, which is essential in revealing the stoichiometric mechanism of wetland plants under environmental fluctuations. Nonetheless, how wetland restoration and degradation affect nutrient trade-off of wetland plants was still unclear. In this study, field experiments were conducted to explore the dynamic of nutrient stoichiometry and nutrient limitation of Carex schmidtii under wetland restoration and degradation. Plant nutrient stoichiometry and stoichiometric relationships among natural (NW), restored (RW), and degraded (DW) tussock wetlands were examined. Results showed that nutrient stoichiometry of C. schmidtii was partly affected by wetland restoration and degradation, and growth stages. The N:P and N:K ratios indicated N-limitation for the growth of C. schmidtii. Robust stoichiometric scaling relationships were quantified between some plant nutrient concentrations and their ratios of C. schmidtii. Some N- and P-related scaling exponents are varied among NW, RW, and DW. PCA indicated that wetland restoration and degradation had significantly affected on the nutrient trade-offs of C. schmidtii (May∼August). Compared to NW, nutrient trade-off in RW was more similar to DW. Carex schmidtii had significant correlation between most nutrients and their ratios, and the SEM indicated that plant P and K concentrations had a high proportional contribution to plant C and N concentrations. Insights into these aspects are expected to contribute to a better understanding of nutrient trade-off of C. schmidtii under wetland restoration and degradation, providing invaluable information for the protection of C. schmidtii tussock wetlands.

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The community‐level scaling relationship between leaf nitrogen and phosphorus changes with plant growth, climate and nutrient limitation

Cited by 45 publications

References 57 publications

Leaf-root-soil N:P stoichiometry of ephemeral plants in a temperate desert in Central Asia

Leaf-root-soil N:P stoichiometry of ephemeral plants in a temperate desert in Central Asia

Effects of ontogenetic stage and leaf age on leaf functional traits and the relationships between traits in Pinus koraiensis

Effect of Wetland Restoration and Degradation on Nutrient Trade-Off of Carex schmidtii

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