IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Growth, biomass allocation and photosynthetic responses are related to intensity of root severance and soil moisture conditions in the plantation tree Cunninghamia lanceolata
Dong, Tingfa1,2; Duan, Baoli3; Zhang, Sheng3; Korpelainen, Helena4; Niinemets, Ulo5; Li, Chunyang1
Corresponding AuthorLi, Chunyang
2016
Source PublicationTREE PHYSIOLOGY
ISSN0829-318X
EISSN1758-4469
Volume36Issue:7Pages:807-817
SubtypeArticle
AbstractWe employed the warm temperate conifer Cunninghamia lanceolata (Lamb.) Hook. as a model of plantation forest species to investigate ecophysiological responses to root treatments (control (0%), and similar to 25, 50 or 75% of the initial root mass) under well-watered and water-limited conditions. Our results indicated that total root dry mass accumulation was negatively associated with the severity of root pruning, but there was evidence of multiple compensatory responses. The plants exhibited higher instantaneous and long-term (assessed by carbon isotope composition, delta C-13) water-use efficiency in pruning treatments, especially under low water availability. Root pruning also increased the fine root/total root mass ratio, specific root length and fine root vitality in both water availability treatments. As a result of the compensatory responses, under well-watered conditions, height, stem dry mass accumulation, leaf/fine root biomass ratio (L/FR), transpiration rate, photosynthetic capacity and photosynthetic nitrogen-use efficiency (E-N) were the highest under 25% pruning. Yet, all these traits except L/FR and foliage nitrogen content were severely reduced under 75% pruning. Drought negatively affected growth and leaf gas exchange rates, and there was a greater negative effect on growth, water potential, gas exchange and E-N when >25% of total root biomass was removed. The stem/aboveground mass ratio was the highest under 25% pruning in both watering conditions. These results indicate that the responses to root severance are related to the excision intensity and soil moisture content. A moderate root pruning proved to be an effective means to improve stem dry mass accumulation.
KeywordCompensatory Response Gas Exchange Nitrogen-use Efficiency Root Excision Stem Growth Water-use Efficiency
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1093/treephys/tpw025
WOS Subject ExtendedForestry
Indexed BySCI
WOS KeywordWATER-USE EFFICIENCY ; PINE PINUS-TAEDA ; POPULUS-CATHAYANA ; AGROFORESTRY SYSTEMS ; FIELD PERFORMANCE ; DROUGHT STRESS ; WHITE SPRUCE ; GAS-EXCHANGE ; PEAR TREES ; SEEDLINGS
Language英语
Quartile1区
TOP
WOS SubjectForestry
WOS IDWOS:000385290900002
Funding OrganizationNational Key Basic Research Program of China(2012CB416901) ; Young Talent Team Program of the Institute of Mountain Hazards and Environment, Chinese Academy of Sciences(SDSQB-2012-01)
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18131
Collection山地表生过程与生态调控重点实验室
Affiliation1.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Nurturing Stn, Linan 311300, Zhejiang, Peoples R China
2.China West Normal Univ, Minist Educ, Key Lab Southwest China Wildlife Resources Conser, Coll Life Sci, Nanchong 637002, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
4.Univ Helsinki, Dept Agr Sci, POB 27, FI-00014 Helsinki, Finland
5.Estonian Univ Life Sci, Inst Agr & Environm Sci, Kreutzwaldi 1, EE-51014 Tartu, Estonia
Recommended Citation
GB/T 7714
Dong, Tingfa,Duan, Baoli,Zhang, Sheng,et al. Growth, biomass allocation and photosynthetic responses are related to intensity of root severance and soil moisture conditions in the plantation tree Cunninghamia lanceolata[J]. TREE PHYSIOLOGY,2016,36(7):807-817.
APA Dong, Tingfa,Duan, Baoli,Zhang, Sheng,Korpelainen, Helena,Niinemets, Ulo,&Li, Chunyang.(2016).Growth, biomass allocation and photosynthetic responses are related to intensity of root severance and soil moisture conditions in the plantation tree Cunninghamia lanceolata.TREE PHYSIOLOGY,36(7),807-817.
MLA Dong, Tingfa,et al."Growth, biomass allocation and photosynthetic responses are related to intensity of root severance and soil moisture conditions in the plantation tree Cunninghamia lanceolata".TREE PHYSIOLOGY 36.7(2016):807-817.
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