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Asymmetric pruning reveals how organ connectivity alters the functional balance between leaves and roots of Chinese fir
Dong, Tingfa1,2; Duan, Baoli4; Korpelainen, Helena5; Niinemets, Ulo6,7; Li, Chunyang3
Corresponding AuthorLi, Chunyang(licy@hznu.edu.cn)
2019-03-01
Source PublicationJOURNAL OF EXPERIMENTAL BOTANY
ISSN0022-0957
Volume70Issue:6Pages:1941-1953
SubtypeArticle
Contribution Rank1
AbstractFollowing asymmetric pruning of leaves and/or roots, the functional balance of distribution of carbon, but not of nitrogen, in Cunninghamia lanceolata is more readily achieved for the roots and leaves on the same side of the pruning compared with those on the opposite side. Abstract The functional balance between leaves and roots is believed to be mediated by the specific location of shoots and roots, i.e. differences in transport distances and degrees of organ connectivity. However, it remains unknown whether the adaptive responses of trees to biomass removal depend on the relative orientation of leaf and root pruning. Here, we applied five pruning treatments to saplings of Cunninghamia lanceolata (Chinese fir) under field and glasshouse conditions, namely no pruning (control), half of lateral branches pruned, half of lateral roots pruned, half of the branches and roots pruned on the same side of the plant, and half of the branches and roots pruned on opposite sides of the plant. The effects of pruning on the growth, carbon storage and allocation, and physiology of leaves and fine roots on the same and opposite sides of the plant were investigated. Compared with the effect of root-pruning on leaves, fine roots were more limited by carbon availability and their physiological activity was more strongly reduced by shoot pruning, especially when branches on the same side of the plant were removed. Pruning of branches and roots on the opposite side of the plant resulted in the lowest carbon assimilation rates and growth among all treatments. The results of a stable-isotope labeling indicated that less C was distributed to fine roots from the leaves on the opposite side of the plant compared to those on the same side, but N allocation from roots to leaves depended less on the relative root and leaf orientation. The results collectively indicate that the functional responses of C. lanceolata to pruning are not only determined by the source-sink balance model but are also related to interactions between leaves and fine roots. We argue that the connectivity among lateral branches and roots depends on their relative orientation, which is therefore critical for the functional balance between leaves and fine roots.
KeywordEcophysiology functional equilibrium nonstructural carbohydrates partial pruning photosynthesis source-sink relations translocation
DOI10.1093/jxb/erz013
Indexed BySCI
WOS KeywordPHOTOSYNTHETIC RESPONSES ; HYDRAULIC INTEGRATION ; PARTIAL DEFOLIATION ; PHLOEM PHYSIOLOGY ; POPULUS-CATHAYANA ; CARBON ALLOCATION ; TEMPERATE TREE ; GAS-EXCHANGE ; GROWTH ; PLANT
Language英语
Funding ProjectTalent Program of the Hangzhou Normal University[2016QDL020]
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000464943900020
Funding OrganizationTalent Program of the Hangzhou Normal University
PublisherOXFORD UNIV PRESS
EI Accession NumberOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25885
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorLi, Chunyang
Affiliation1.China West Normal Univ, Key Lab Southwest China Wildlife Resources Conser, Minist Educ, Nanchong 637002, Sichuan, Peoples R China;
2.China West Normal Univ, Coll Life Sci, Nanchong 637002, Sichuan, Peoples R China;
3.Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China;
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China;
5.Univ Helsinki, Dept Agr Sci, Viikki Plant Sci Ctr, POB 27, FI-00014 Helsinki, Finland;
6.Estonian Univ Life Sci, Inst Agr & Environm Sci, Kreutzwaldi 1, EE-51006 Tartu, Estonia;
7.Estonian Acad Sci, Kohtu 6, EE-10130 Tallinn, Estonia
Recommended Citation
GB/T 7714
Dong, Tingfa,Duan, Baoli,Korpelainen, Helena,et al. Asymmetric pruning reveals how organ connectivity alters the functional balance between leaves and roots of Chinese fir[J]. JOURNAL OF EXPERIMENTAL BOTANY,2019,70(6):1941-1953.
APA Dong, Tingfa,Duan, Baoli,Korpelainen, Helena,Niinemets, Ulo,&Li, Chunyang.(2019).Asymmetric pruning reveals how organ connectivity alters the functional balance between leaves and roots of Chinese fir.JOURNAL OF EXPERIMENTAL BOTANY,70(6),1941-1953.
MLA Dong, Tingfa,et al."Asymmetric pruning reveals how organ connectivity alters the functional balance between leaves and roots of Chinese fir".JOURNAL OF EXPERIMENTAL BOTANY 70.6(2019):1941-1953.
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