Interactive Effects of Microbes and Nitrogen on Panicum virgatum Root Functional Traits and Patterns of Phenotypic Selection

Research Highlights: Short-term nitrogen (N) addition did not significantly alter the effects of seasonal drought on the leaf functional traits in Machilus pauhoi Kanehira seedlings in N-rich subtropical China. Background and Objectives: Seasonal drought and N deposition are major drivers of global environmental change that affect plant growth and ecosystem function in subtropical China. However, no consensus has been reached on the interactive effects of these two drivers. Materials and Methods: We conducted a full-factorial experiment to analyze the single and combined effects of seasonal drought and short-term N addition on chemical, morphological and physiological traits of M. pauhoi seedlings. Results: Seasonal drought (40% of soil field capacity) had significant negative effects on the leaf N concentrations (LNC), phosphorus (P) concentrations (LPC), leaf thickness (LT), net photosynthetic rate (A), transpiration rate (E), stomatal conductance (Gs), and predawn leaf water potential (ψPD), and significant positive effects on the carbon:N (C:N) ratio and specific leaf area (SLA). Short-term N addition (50 kg N·hm−2·year−1 and 100 kg N·hm−2·year−1) tended to decrease the C:N ratio and enhance leaf nutrient, growth, and photosynthetic performance because of increased LNC, LPC, LT, leaf area (LA), SLA, A, E, and ψPD; however, it only had significant effects on LT and Gs. No significant interactive effects on leaf traits were detected. Seasonal drought, short-term N addition, and their interactions had significant effects on soil properties. The soil total C (STC), nitrate N (NO3−-N) and soil total N (STN) concentrations were the main factors that affected the leaf traits. Conclusions: Seasonal drought had a stronger effect on M. pauhoi seedling leaf traits than short-term N deposition, indicating that the interaction between seasonal drought and short-term N deposition may have an additive effecton M. pauhoi seedling growth in N-rich subtropical China.

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Phenotypic selection on leaf functional traits of two congeneric species in a temperate rainforest is consistent with their shade tolerance

Oecologia ◽

10.1007/s00442-013-2590-2 ◽

2013 ◽

Vol 173 (1) ◽

pp. 13-21 ◽

Cited By ~ 13

Author(s):

Ernesto Gianoli ◽

Alfredo Saldaña

Keyword(s):

Functional Traits ◽

Shade Tolerance ◽

Phenotypic Selection ◽

Congeneric Species ◽

Temperate Rainforest ◽

Leaf Functional Traits

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Impact of plant root functional traits and associated mycorrhizas on the aggregate stability of a tropical Ferralsol

Geoderma ◽

10.1016/j.geoderma.2017.09.033 ◽

2018 ◽

Vol 312 ◽

pp. 6-16 ◽

Cited By ~ 29

Author(s):

Julien Demenois ◽

Fabian Carriconde ◽

Pauline Bonaventure ◽

Jean-Luc Maeght ◽

Alexia Stokes ◽

...

Keyword(s):

Functional Traits ◽

Plant Root ◽

Aggregate Stability ◽

Root Functional Traits

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Trade-off Strategy of Three Dominant Species in Grazing Exclusion of Desert Steppe,china

10.21203/rs.3.rs-929704/v1 ◽

2021 ◽

Author(s):

jingli ma ◽

Hongbin Ma ◽

Yao Zhou ◽

Qi Lu ◽

Yan Shen

Keyword(s):

Leaf Area ◽

Functional Traits ◽

Root Length ◽

Dominant Species ◽

Specific Root Length ◽

Desert Steppe ◽

Short Term ◽

Trade Off ◽

Grazing Exclusion ◽

Root Functional Traits

Abstract Background and AimsGrazing exclusion is a powerful measure to restore the ecological environment in desert steppe. Studying the changing trend of functional traits and trade-off strategy about dominant species what is of great significance to understand the effect of grazing exclusion on species succession. Methods We studied that the change of leaf and root functional traits of three dominant species (Lespedeza potaninii, Agropyron mongolicum and Stipa breviflora) under different term of grazing exclusion. ResultsWe found that the leaf area and leaf nitrogen content, leaf dry matter content, total root length, specific root length and specific root surface of Lespedeza potaninii in grazing were higher than grazing exclusion. The highest specific leaf area, specific root length of Agropyron mongolicum and Stipa breviflora were observed in short-term grazing exclusion. Leaf tissue density and root tissue density significantly decreased in short-term grazing exclusion. Economic spectrum exist, Lespedeza potaninii have more conservation strategy in short-term grazing exclusion compared with grazing. Agropyron mongolicum and Stipa breviflora have more acquisition strategy in grazing exclusion. Average diameters have great effected on above-ground biomass.ConclusionThe result showed that grazing exclusion change leaf and root functional traits of three dominant species, different species have different trade-off strategy.

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