文献类型：期刊文献

英文题名：Nutrient Variations and Their Use Efficiency of Pinus massoniana Seedling Tissues in Response to Low Phosphorus Conditions

作者：Xu, Jin[1] Jian, Zunji[1] Zhang, Yuanzheng[2] Deng, Xiuxiu[3] Lei, Lei[1,4] Zeng, Lixiong[1,4] Xiao, Wenfa[1,4] Ni, Yanyan[2,5]

通信作者：Xiao, WF[1];Ni, YY[2];Xiao, WF[3];Ni, YY[4]

机构：[1]Chinese Acad Forestry, Natl Forestry & Grassland Adm, Ecol & Nat Conservat Inst, Key Lab Forest Ecol & Environm, Beijing 100091, Peoples R China;[2]Minist Ecol & Environm, Nanjing Inst Environm Sci, Nanjing 210042, Peoples R China;[3]Chinese Acad Forestry, Expt Ctr Forestry North China, Beijing 102300, Peoples R China;[4]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China;[5]Natl Ecol Qual Comprehens Monitoring Ctr, Kunyu Mt Forest Stn, Yantai 264100, Peoples R China

年份：2024

卷号：15

期号：2

外文期刊名：FORESTS

收录：;EI(收录号：20240915640594);Scopus(收录号：2-s2.0-85185829229);WOS:【SCI-EXPANDED(收录号:WOS:001176957400001)】；

基金：We are grateful to the Zigui Forest Ecosystem Research Station for providing the experimental site and experimental supports.

语种：英文

外文关键词：Pinus massoniana; phosphorus; biomass; nutrient resorption; non-structural carbohydrates

摘要：Investigating the mechanisms by which plants adapt to low phosphorus content in ecosystems is crucial for nutrient dynamics division. Our study investigated the growth adaptation strategies of Pinus massoniana seedlings to low phosphorus conditions, including nutrient and non-structural carbohydrate (NSC) allocation, nutrient stoichiometry, and changes in nutrient resorption efficiency along a fact-based gradient. Our results showed that the total biomass and aboveground biomass proportion increased with substrate phosphorus content, reaching maximum biomass in the one-time phosphorus treatment. The nutrient concentration of components remained relatively stable, with the allocating preference to roots and needles under low phosphorus conditions. NSC was allocated as starch in fine roots and as soluble sugar in needles. Seedlings did not show signs of phosphorus limitation, even in the non-phosphorus group. The nitrogen resorption efficiency to phosphorus resorption efficiency ratio (NRE: PRE) of needles significantly varied between the high and low phosphorus treatments. In response to phosphorus deficiency, seedlings demonstrated homeostatic adjustments to maintain the relative stability of nutrient concentration. Fine roots and needles were prioritized to ensure nutrient uptake and photosynthetic product production. Additionally, it was necessary to differentiate the indicative function of nitrogen/phosphorus for various species and components, and NRE: PRE potentially provides a sensitive indicator of nutrient limitation status.