Root nitrogen acquisition strategy of trees and understory species in a subtropical pine plantation in southern China
Root nitrogen acquisition strategy of trees and understory species in a subtropical pine plantation in southern China
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华南亚热带松林树木和林下树种根氮吸收策略
DOI：
10.1007/s10342-020-01284-6
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发表时间：
2020-05
影响因子：
2.8
通讯作者：
Xingliang Xu
中科院分区：
文献类型：
--
作者：
Qianyuan Liu;Huimin Wang;Xingliang Xu
氮(N)被认为是限制植物生长和代谢的主要因素，而吸收根在其中起着关键作用。在植物资源获取中的作用。然而，对菌根定植和形态的作用知之甚少。根系结构特征对氮素吸收率的影响。我们检查了铵（NH+ 4），硝酸盐的吸收率。（NO−3）和甘氨酸使用15N同位素示踪技术，并测量菌根定植率和功能性状。亚热带人工林生长季节吸收根的形态、结构和化学特征。结果。结果表明，乔木、灌木和草本植物均倾向于吸收NH+ 4，而不是吸收NO−3和甘氨酸，这可能是由于速效态优势所致。天然土壤中的氮素形态。在亚热带人工林中共存的物种不存在化学生态位分化，但存在化学生态位分化。是植物物种间氮获取的时间生态位分离。菌根定殖率高的吸收根比定殖率低的吸收根对氮的吸收速率高。5月，形态性状(直径和。根组织密度在氮素吸收中起着重要的作用。比根长较短的植株对NH+ 4、NO−3和甘氨酸的吸收速率高于直径较小的植株。更长的SRL。而在8月份，根系分支的结构特征可能对促进养分吸收至关重要。分枝密集的吸收根比分枝较少的吸收根表现出更高的氮吸收速率。我们的研究结果表明，植物物种可能通过菌根共生进化出有效的氮获取策略。根系形态和建筑特征在时间尺度上适应不断变化的环境。
Nitrogen (N) is considered as a major factor that limits plant growth and metabolism, and absorptive roots play a critical.role in plant resource acquisition. However, little is known about the roles of mycorrhizal colonization, and morphological.and architectural traits of absorptive roots in N uptake rates. We examined the uptake rates for ammonium (NH+ 4 ), nitrate.(NO− 3) and glycine using a 15N isotope tracer technique and measured mycorrhizal colonization rates and functional traits.(morphology, architecture and chemistry) of absorptive roots in a subtropical plantation during the growing season. Results.showed that trees, shrubs and herbs all preferred to take up NH+ 4 over NO− 3 and glycine, likely due to the dominant available.N form in native soils. Species coexisting in the subtropical plantation did not show chemical niche differentiation, but there.was a temporal niche separation in N acquisition across plant species. Absorptive roots with higher mycorrhizal colonization rates exhibited higher N uptake rates than those with lower colonization. In May, morphological traits (diameter and.root tissue density) seemed playing important roles in N acquisition on that the absorptive roots with larger diameter and.shorter specific root length (SRL) showed higher uptake rates for NH+ 4 , NO− 3, and glycine than those with smaller diameter.and longer SRL. While in August, the architectural traits of root branching might be essential to enhance nutrient absorption.on that the absorptive roots with intensive branching exhibited higher N uptake rates than those with less branching. Our.findings suggested that plant species may evolve effective N acquisition strategies integrated mycorrhizal symbiosis, and.root morphological and architectural traits over a temporal scale to acclimate to the changing environments.
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影响因子：
4.2
作者：
Mei-ho Lee;L. Comas;H. Callahan
通讯作者：
Mei-ho Lee;L. Comas;H. Callahan
DOI：
10.1111/nph.13722
发表时间：
2016-03
期刊：
The New phytologist
影响因子：
--
作者：
Shah F;Nicolás C;Bentzer J;Ellström M;Smits M;Rineau F;Canbäck B;Floudas D;Carleer R;Lackner G;Braesel J;Hoffmeister D;Henrissat B;Ahrén D;Johansson T;Hibbett DS;Martin F;Persson P;Tunlid A
通讯作者：
Tunlid A
DOI：
--
发表时间：
1991-02
期刊：
--
影响因子：
--
作者：
A. Fitter;D. Atkinson
通讯作者：
A. Fitter;D. Atkinson
温带和热带森林21种优势树种对有机和无机氮的吸收
影响因子：
4
作者：
Min Liu;Changcheng Li;Xingliang Xu;Wolfgang Wanek;Ning Jiang;Huimin Wang
通讯作者：
Huimin Wang
不同生根策略的两种树种幼苗细根对时间养分异质性和竞争的响应
影响因子：
2.6
作者：
Wang P;Shu M;Mou P;Weiner J
通讯作者：
Weiner J