Patterns of nitrogen and phosphorus stoichiometry among leaf, stem and root of desert plants and responses to climate and soil factors in Xinjiang, China

Luo, Yan; Peng, Qingwen; Li, Kaihui; Gong, Yanming; Liu, Yanyan

doi:10.1016/j.catena.2020.105100

Cited by 82 publications

(57 citation statements)

References 57 publications

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“…Vascular plants increase their investment in VD to enhance their water transport capacity in response to dryness, however, vein construction is considered uneconomic because it consumes large amounts of carbon [74,75]. Nitrogen directly affects vegetative growth and determines photosynthetic capacity becauseit is mostly present in photosynthetic enzymes [76].The N mass of A. sparsifolia at all the sampling sites in this study fell in the range of 10.51-23.31 mg g −1 , which included the average value of desert plants in Xinjiang [77] and other desert plants such as Reaumuria soongorica [78]. The leaves of A. sparsifolia were isobilateral with developed palisade tissue.…”

Section: Coupling Relationship Between Leaf Economic and Hydraulic Traits Based On The Mesophyll Structurementioning

confidence: 88%

Coupling Relationship of Leaf Economic and Hydraulic Traits of Alhagisparsifolia Shap. in a Hyper-Arid Desert Ecosystem

Yin

Tariq

Zhang

et al. 2021

Plants

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In this study, Alhagisparsifolia Shap. was used to test the hypothesis that leaf economic and hydraulic traits are coupled in plants in a hyper-arid region. Five economic traits and six hydraulic traits were examined to explore the relationship. Results showed that the stomatal density (SD) on both surfaces was coupled with maximum stomatal conductance to water vapor (gwmax) and leaf tissue density (TD). SD on adaxial surface (SDaba) was significantly positively related to vein density (VD) but negatively related to leaf thickness (LT) and stomatal length on adaxial surface (SLada). Nitrogen concentration based on mass (Nmass) was significantly negatively correlated with leaf mass per area (LMA), LT, and VD, whereas nitrogen concentration based on area (Narea) was significantly positively related to LMA and TD. Mean annual precipitation (MAP) contributed the most to the changes in LT and stomatal length (SL). Soil salt contributed the most to TD, SD, and gwmax. Soli nutrients influenced the most of LMA and VD. Mean annual temperature contributed the most to Nmass and Narea. In conclusion, the economics of leaves coupled with their hydraulic traits provides an economical and efficient strategy to adapt to the harsh environment in hyper-arid regions.

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Section: Coupling Relationship Between Leaf Economic and Hydraulic Traits Based On The Mesophyll Structurementioning

confidence: 88%

Coupling Relationship of Leaf Economic and Hydraulic Traits of Alhagisparsifolia Shap. in a Hyper-Arid Desert Ecosystem

Yin

Tariq

Zhang

et al. 2021

Plants

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“…The C:N and C:P ratios in litter represent the garbage decomposed by microorganisms (Freschet et al, 2012;Hobbie, 2015;Zhang et al, 2018aZhang et al, , 2019a. The N:P ratio is also an important indicator to measure the limit of N or P in the soil (Koerselman and Meuleman, 1996;Luo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…In certain habitats, plants may survive by changing the stoichiometry among their organs. The relationship of the C:N, C:P, and N:P ratios with plant organs, such as leaves, stems, and roots, reflects the biophysical trade-offs of plant resource acquisition and growth strategy (Li et al, 2017;Zhang et al, 2019a;Luo et al, 2021). Leaves are an essential organ for C fixation, and it need much more N and P than stems and roots to perform a high metabolic function.…”

Section: Introductionmentioning

confidence: 99%

“…(d) The stoichiometry characteristics of different organs might be influenced by different factors. Luo et al (2021) found that the ecological stoichiometric characteristics of leaves, stems, and roots of desert plants may be limited by different factors, in which soil factor is dominant and climate factor plays an indirect role (Luo et al, 2021). He et al (2015) found that the stoichiometry of leaves in a desert plant Reaumuria soongorica are influenced by climatic factors, but stoichiometry of stems and roots are mostly affected by soil P. In a nutshell, precipitation in arid regions might affect the distribution of soil nutrients at different depths, and in turn, affects the stoichiometric characteristics of plants.…”

Section: Introductionmentioning

confidence: 99%

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Stoichiometry of C:N:P in the Roots of Alhagi sparsifolia Is More Sensitive to Soil Nutrients Than Aboveground Organs

et al. 2021

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The stoichiometry of carbon, nitrogen, and phosphorus (C:N:P) among leaves, stems, and roots reflects trade-offs in plants for acquiring resources and their growth strategy. The widely distributed plant Alhagi sparsifolia is an ideal species to study the ecological stoichiometry in different organs in response to the availability of nutrients and water in the desert ecosystem. However, which response of organs is most sensitive to environmental conditions is still unclear. To answer this question, we collected samples of plants and soils including not only aboveground leaves and stems, but also underground roots and soils from a wide range of arid areas during the growing season. The C, N, P, C:N, C:P, and N:P ratios in leaves, thorns, stems, and roots were derived to explore their relationship as well as their response mechanisms to nutrients and water spanning 1 m deep in the soil. The results showed that the order of N concentration was leaves > thorns > stems > roots, that the concentration of P in the leaves, thorns, and stems was similar, and that their values were higher than those in the roots. First, the C:N ratios in the leaves and stems were significantly positively correlated with the ratio in roots. The C:N ratios in each organ showed a significant relationship with the soil alkali hydrolyzable nitrogen (SAN) above a depth of 60 cm. In addition to SAN, soil available phosphorus (SAP) and soil organic carbon (SOC) affect the C:N ratio in the roots. Second, the C:P and N:P ratios in aboveground organs showed no correlations with the ratios in roots. The C:P and N:P ratios in the leaves and thorns have no relationship with soil nutrients, while the C:P ratio in roots was influenced by SAN and SOC in all soil layers. Finally, the N:P ratios in roots were also affected by nutrients in different soil depths at 0–20 and 60–80 cm. These results illustrate that the roots were more sensitive to soil nutrients than the aboveground parts. Our study of ecological stoichiometry also suggests a novel systematic approach for analyzing the sensitivity of responses of an organ to environmental conditions.

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“…As the major elements, N is the key ingredient of pivotal molecules like amino acids, amides, and nucleic acids, whereas P is an essential component of ATP, phosphates, and ribosomes [1]. Previous studies suggested that nutrient stoichiometry and allocation are related to the plant strategies including the balance of multiple key elements, growth, vegetation composition, and nutrient condition at the community level [2]. As the principal elements of plants, the carbon (C), N, P, and their ratios (C:N:P) have the mechanistic link with the growth rate of organisms [3].…”

Section: Introductionmentioning

confidence: 99%

Influence of Interactions between Nitrogen, Phosphorus Supply and Epichloёbromicola on Growth of Wild Barley (Hordeum brevisubulatum)

Lang

Zhou

Chen

et al. 2021

JoF

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Epichloë endophytes are biotrophic fungi that establish mutualistic symbiotic relationship with grasses and affect performance of the host under different environments. Wild barley (Hordeum brevisubulatum) is an important forage grass and often infected by Epichloë bromicola, thus showing tolerances to stresses. Since the plant growth correlates with both microbial infection and nutrient stoichiometry, this study was performed to investigate whether the function of Epichloë bromicola endophyte to improve host growth depend upon the nitrogen (N), phosphorus (P) fertilization. Epichloë-infected (E+) and Epichloë-free (E−) wild barley plants were subjected to nine types of mixed N (0.2 mM, 3 mM, 15 mM) and P (0.01 mM, 0.1 mM, 1.5 mM) levels treatments for 90 d to collect plant samples and determine multiple related indexes. We found that E. bromicola and N, P additions positively affected seed germination. Further, E. bromicola significantly enhanced chlorophyll content and root metabolic activity under N-deficiency, and meanwhile, might alter allocation of photosynthate under different conditions. The contents of N, P and stoichiometry of C:N:P of E+ plants were significantly higher than that of E− under nutrient deficiency, but contrary results were observed under adequate nutrients. Therefore, we propose that the growth-promoting ability of E. bromicola is closely correlated with N and P additional levels. Under low N, P additions, positive roles of endophyte are significant as opposed to negative roles under high N, P additions.

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Patterns of nitrogen and phosphorus stoichiometry among leaf, stem and root of desert plants and responses to climate and soil factors in Xinjiang, China

Cited by 82 publications

References 57 publications

Coupling Relationship of Leaf Economic and Hydraulic Traits of Alhagisparsifolia Shap. in a Hyper-Arid Desert Ecosystem

Coupling Relationship of Leaf Economic and Hydraulic Traits of Alhagisparsifolia Shap. in a Hyper-Arid Desert Ecosystem

Stoichiometry of C:N:P in the Roots of Alhagi sparsifolia Is More Sensitive to Soil Nutrients Than Aboveground Organs

Influence of Interactions between Nitrogen, Phosphorus Supply and Epichloёbromicola on Growth of Wild Barley (Hordeum brevisubulatum)

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