文献类型：期刊文献

英文题名：Root Foraging Precision of Pinus pumila (Pall.) Regel Subjected to Contrasting Light Spectra

作者：He, Chunxia[1,2] Gao, Jun[1,2] Zhao, Yan[3] Liu, Jing[3]

第一作者：何春霞;He, Chunxia

通信作者：Gao, J[1];Gao, J[2];Zhao, Y[3]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Natl Forestry & Grassland Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China;[3]Henan Univ Sci & Technol, Coll Hort & Plant Prod, Luoyang 471002, Peoples R China

年份：2021

卷号：10

期号：7

外文期刊名：PLANTS-BASEL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000676893600001)】；

基金：This research was funded by Fundamental Research Funds for the Central Non-profit Research Institution of CAF (grant number CAFYBB2018ZA001).

语种：英文

外文关键词：Pinus pumila; alpine ecosystem; root foraging; fine root proliferation

摘要：Root foraging behavior in heterogeneous patterns of soil nutrients is not well understood for undergrowth in alpine forests, where light spectra may generate an interactive effect on root foraging precision. A dwarf alpine species, Pinus pumila (Pall.) Regel., was cultured in pots where nitrogen (N)-phosphorus (P)-potassium (K) nutritional granules (N-P2O5-K2O, 14-13-13) were added to both halves of an inner space at a rate of 67.5 mg N (homogeneous) or 135 mg N to a random half (heterogeneous). Potted seedlings were subjected to either a green-and-blue light spectrum with a red-to-green light ratio of 4.24 (15.3% red, 64.9% green, and 19.8% blue) or a red-light enriched spectrum (69.4% red, 30.2% green, and 0.4% blue) both at irradiations of 200.43 mu mol m(-2) s(-1). The root foraging precision was assessed by the difference in the fine root morphology or weight between the two halves. The foraging precision was assessed by both fine root length and surface area and was promoted in seedlings subjected to the heterogeneous pattern in the red-light enriched spectrum. Seedlings subjected to the green-and-blue light spectrum showed lower shoot growth, biomass, and root morphology but had higher shoot and root N and P concentrations. The heterogenous pattern resulted in greater seedling growth and fine root morphology as well as N and P concentrations compared to the homogeneous pattern. We conclude that P. pumila has a strong ability to forage nutrients in heterogenous soil nutrients, which can be further promoted by a spectrum with higher red-light proportions.