Response of functional traits in Machilus pauhoi to nitrogen addition is influenced by differences of provenances
Response of functional traits in Machilus pauhoi to nitrogen addition is influenced by differences of provenances
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DOI：
10.1016/j.foreco.2022.120207
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发表时间：
2022-06
影响因子：
3.7
通讯作者：
Yuxing Zou;Baoyin Li;J. Peñuelas;J. Sardans;Hua Yu;Xiaoping Chen;Xingyu Deng;Dongliang Cheng;Quanlin Zhong
中科院分区：
文献类型：
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作者：
Yuxing Zou;Baoyin Li;J. Peñuelas;J. Sardans;Hua Yu;Xiaoping Chen;Xingyu Deng;Dongliang Cheng;Quanlin Zhong
全面研究植物全株功能性状对氮沉降的响应，有助于深入了解植物的资源获取策略。然而，目前对氮沉降的研究主要集中在叶片或根系上。在中国东南部的一个普通园林试验中，对5个种源的樟科植物进行了氮沉降模拟试验。我们测量了叶片、茎和根的29个性状（生物量、物候性状和养分浓度）对氮添加的响应，并选择了26个与整体资源获取策略相关的重要功能性状。pauhoiseedlings。我们发现N（氮）的添加显著增加了m的生物量。保育苗与器官间生物量分配的改变。不同种源间叶片、茎和根性状对氮素添加的响应并不总是一致的。pauhoiseedlings。碳(C)、磷(P)浓度和氮磷比在三个器官间的变化规律一致。在器官水平上，氮浓度、C:N比、表型性状比叶面积（SLA）和比根面积（SRL）的响应方向不一致。结果表明，氮素添加改变了柽柳生物量的分配模式。对地上、地下器官的资源获取能力进行分析。氮浓度和碳氮比可能在这一调控过程中起关键作用。总体而言，氮素增加了叶片质量分数（LMF）和SRL，降低了叶片质量分数（SLA）和根系质量分数（RMF）。pauhoi。不同种源间的生物量分配和资源获取模式也存在差异。AF和SC幼苗可以作为首选种源。它们具有均衡的资源获取策略和较高的表型可塑性。本研究有助于更全面地了解氮沉降对植物整体的影响，并为土壤养分的精确管理提供理论依据。氮沉降环境下的泡桐及其人工林。
Comprehensive studies on the response of whole plant functional traits to nitrogen deposition can provide insight into the resource acquisition strategies of plants. However, current studies on nitrogen deposition have mainly focused on leaves or roots.We conducted nitrogen deposition simulation experiments withMachilus pauhoi(Lauraceae) from five provenances in a common garden experiment in the southeast of China. We measured 29 traits (biomass, phenology traits, and nutrient concentrations) of leaves, stems, and roots in response to nitrogen addition and selected 26 distinct important functional traits related to resource acquisition strategies of the wholeM. pauhoiseedlings.We found that N (Nitrogen) addition significantly increased the biomass ofM. pauhoiseedlings and altered biomass allocation among organs. The response of the leaf, stem and root traits to nitrogen addition was not always consistent among the different provenances ofM. pauhoiseedlings. A uniform variation pattern of the three organs was found in the C (Carbon) and P (Phosphorus) concentrations, as well as N:P ratio. In contrast, N concentration, the C:N ratio and the phenotypic trait specific leaf area (SLA) and specific root area (SRL) did not respond in the same direction at the organ level.We concluded that nitrogen addition alters the biomass allocation pattern ofM. pauhoiand the resource acquisition capacity of above- and below-ground organs. N concentrations and C:N ratio may play a key role in this regulatory process. Overall, N addition increased leaf mass fraction (LMF) and SRL, and instead decreased SLA and root mass fraction (RMF) ofM. pauhoi. There are also differences in biomass allocation and resource acquisition patterns between the different provenances. AF and SC seedlings can be preferred provenances forM. pauhoidue to their balanced resource acquisition strategy and high phenotypic plasticity, respectively.Our study may contribute to a more comprehensive understanding of how N deposition affects the plant as a whole and provide a theoretical basis for precise nutrient management ofM. pauhoiseedlings and their plantations in the context of nitrogen deposition.