scholarly journals Fine Root Morphology, Biochemistry and Litter Quality Indices of Fast- and Slow-growing Woody Species in Ethiopian Highland Forest

Ecosystems ◽  
2017 ◽  
Vol 21 (3) ◽  
pp. 482-494 ◽  
Author(s):  
Dessie Assefa ◽  
Douglas L. Godbold ◽  
Beyene Belay ◽  
Abrham Abiyu ◽  
Boris Rewald
Keyword(s):  
Root Morphology ◽  
Litter Quality ◽  
Fine Root ◽  
Woody Species ◽  
Quality Indices ◽  
Fine Root Morphology ◽  
Ethiopian Highland ◽  
Slow Growing

Responses of fine root exudation, respiration, and morphology in three early successional tree species to increased air humidity and different soil nitrogen sources

2021 ◽  
Author(s):  
Marili Sell ◽  
Ivika Ostonen ◽  
Gristin Rohula-Okunev ◽  
Linda Rusalepp ◽  
Azadeh Rezapour ◽  
...  
Keyword(s):  
Soil Nitrogen ◽  
Root Morphology ◽  
Fine Roots ◽  
Root Respiration ◽  
Fine Root ◽  
Water Flux ◽  
Nitrogen Sources ◽  
Air Humidity ◽  
Fine Root Morphology ◽  
Species Specific

Abstract Global climate change scenarios predict an increase in air temperature, precipitation, and air humidity for northern latitudes. Elevated air humidity may significantly reduce the water flux through forest canopies and affect interactions between water and nutrient uptake. However, we have limited understanding of how altered transpiration would affect root respiration and carbon (C) exudation as fine root morphology acclimates to different water flux. We investigated the effects of elevated air relative humidity (eRH) and different inorganic nitrogen sources (NO3− and NH4+) on above and belowground traits in hybrid aspen (Populus × wettsteinii Hämet-Ahti), silver birch (Betula pendula Roth.), and Scots pine (Pinus sylvestris L.) grown under controlled climate chamber conditions. The eRH significantly decreased the transpiration flux in all species, decreased root mass-specific exudation in pine, and increased root respiration in aspen. eRH also affected fine root morphology, with specific root area increasing for birch but decreasing in pine. The species comparison revealed that pine had the highest C exudation, while birch had the highest root respiration rate. Both humidity and nitrogen treatments affected the share of absorptive and pioneer roots within fine roots; however, the response was species-specific. The proportion of absorptive roots was highest in birch and aspen, the share of pioneer roots was greatest in aspen, and the share of transport roots was greatest in pine. Fine roots with lower root tissue density were associated with pioneer root tips and had a higher C exudation rate. Our findings underline the importance of considering species-specific differences in relation to air humidity and soil nitrogen availability that interactively affect the C input–output balance. We highlight the role of changes in the fine root functional distribution as an important acclimation mechanism of trees in response to environmental change.

scholarly journals Wind intensity affects fine root morphological traits with consequences for plant-soil feedback effects

AoB Plants ◽  
2020 ◽  
Vol 12 (5) ◽  
Author(s):  
Luise Werger ◽  
Joana Bergmann ◽  
Ewald Weber ◽  
Johannes Heinze
Keyword(s):  
Root Morphology ◽  
Morphological Traits ◽  
Fine Root ◽  
High Wind ◽  
Root:Shoot Ratio ◽  
Fine Root Morphology ◽  
Plant Soil ◽  
Induced Changes ◽  
Wind Intensity ◽  
Plant Soil Interactions

Abstract Wind influences the development, architecture and morphology of plant roots and may modify subsequent interactions between plants and soil (plant–soil feedbacks—PSFs). However, information on wind effects on fine root morphology is scarce and the extent to which wind changes plant–soil interactions remains unclear. Therefore, we investigated the effects of two wind intensity levels by manipulating surrounding vegetation height in a grassland PSF field experiment. We grew four common plant species (two grasses and two non-leguminous forbs) with soil biota either previously conditioned by these or other species and tested the effect of wind on root:shoot ratio, fine root morphological traits as well as the outcome for PSFs. Wind intensity did not affect biomass allocation (i.e. root:shoot ratio) in any species. However, fine-root morphology of all species changed under high wind intensity. High wind intensity increased specific root length and surface area and decreased root tissue density, especially in the two grasses. Similarly, the direction of PSFs changed under high wind intensity in all four species, but differences in biomass production on the different soils between high and low wind intensity were marginal and most pronounced when comparing grasses with forbs. Because soils did not differ in plant-available nor total nutrient content, the results suggest that wind-induced changes in root morphology have the potential to influence plant–soil interactions. Linking wind-induced changes in fine-root morphology to effects on PSF improves our understanding of plant–soil interactions under changing environmental conditions.

Impact of Heterobasidion root-rot on fine root morphology and associated fungi in Picea abies stands on peat soils

Mycorrhiza ◽  
2016 ◽  
Vol 26 (5) ◽  
pp. 465-473 ◽  
Author(s):  
Talis Gaitnieks ◽  
Darta Klavina ◽  
Indrikis Muiznieks ◽  
Taina Pennanen ◽  
Sannakajsa Velmala ◽  
...  
Keyword(s):  
Picea Abies ◽  
Root Morphology ◽  
Root Rot ◽  
Fine Root ◽  
Peat Soils ◽  
Fine Root Morphology

scholarly journals Responses of nutrient capture and fine root morphology of subalpine coniferous tree Picea asperata to nutrient heterogeneity and competition

PLoS ONE ◽  
2017 ◽  
Vol 12 (11) ◽  
pp. e0187496 ◽  
Author(s):  
Dandan Li ◽  
Hongwei Nan ◽  
Jin Liang ◽  
Xinying Cheng ◽  
ChunZhang Zhao ◽  
...  
Keyword(s):  
Root Morphology ◽  
Fine Root ◽  
Coniferous Tree ◽  
Nutrient Heterogeneity ◽  
Fine Root Morphology ◽  
Picea Asperata
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