Warming effects on root morphological and physiological traits: The potential consequences on soil C dynamics as altered root exudation

Effects of two root-secreted phenolic compounds from a subalpine coniferous species on soil enzyme activity and microbial biomass

“…[26] Warmer temperature not only directly and indirectly affect soil biogeochemical processes, but can also influence the amounts and types of root-derived C via changing root morphological and physiological traits, thereby affecting SOM decomposition and nutrient cycling. [27] In addition, temperature has been demonstrated to induce shift of microbial community structure [12]; however, that whether this shift is due to temperature per se or changed specific root-derived C compounds under different temperature conditions or their interactions remains unclear. Thus, investigating the effects of specific compound added into the soil with different concentration and temperature regimes on soil microbial and enzymatic properties is beneficial to understand the complex biogeochemical processes in response to environmental changes.…”

Positive effects of night warming on physiology of coniferous trees in late growing season: Leaf and root

“…Some field (Rollinson and Kaye, 2012) and modeling studies (Lebourgeois et al, 2010) have illuminated that warm temperature would expand plant growing season due to early onset and later end (Parmentier et al, 2011;Chung et al, 2013). Previous studies about the effect of experimental warming on tree species have focused primarily on net mineralization, net nitrification and denitrification rates, ectomycorrhizal colonization and root exudation in early growing season, peak of growing season and non-growing season (Zhao and Liu, 2009;Yin et al, 2012Yin et al, , 2013Yin et al, , 2014. Global warming affects plant growth through direct effects on photosynthesis and respiration (Albert et al, 2011) and indirect effects on soil nitrogen availability (Sardans et al, 2008) and soil moisture (Holsten et al, 2009).…”

“…It has been widely recognized that effects of global warming on plants varied by season, meteorologic conditions, phenology and plant organs (Gimeno et al, 2012;Yin et al, 2013Yin et al, , 2014. Alteration in plant phenology is one of the most sensitive and observable Abbreviations: AQE, apparent quantum efficiency; Fv/Fm, maximum quantum efficiency of PS II; NR, nitrate reductase; NSC, non-structural carbohydrate; PAR, photosynthetically active radiation; P max , light-saturated rate of photosynthesis; P n , net photosynthesis rate; R d , dark respiration rate; SLA, specific leaf area; SRA, root specific surface area; SRL, specific root length; TF, triphenylformazan; TTC, triphenyltetrazolium chloride.biological response to global warming (Bronson et al, 2009;Morin et al, 2010;Polgar and Primack, 2011).…”

Effects of experimental warming on soil respiration and biomass in Quercus variabilis Blume and Pinus densiflora Sieb. et Zucc. seedlings

“…For example, a few recent studies have reported warming-induced soil respiration in silver birch, Norway spruce, and Scots pine seedlings growing in similar boreal ecosystems (Pumpanen et al 2012), and in a dragon spruce plantation and natural forests (Xu et al 2012;Yin et al 2013). Soil respiration (R S , soil CO 2 efflux) is an important natural source of CO 2 atmospheric emissions, as well as a representative indicator of soil biological activity (Schlesinger and Andrews 2000).…”

“…Variation in the response of belowground components (e.g., soil and root respiration, root exudates, and microbial processes) to experimental warming can provide key information on the carbon transition from leaf photosynthesis to soil during rises in temperature (Atkin et al 2000;Bradford et al 2008;Liu et al 2011;Yin et al 2013). For example, a few recent studies have reported warming-induced soil respiration in silver birch, Norway spruce, and Scots pine seedlings growing in similar boreal ecosystems (Pumpanen et al 2012), and in a dragon spruce plantation and natural forests (Xu et al 2012;Yin et al 2013).…”