Effects of mistletoe removal on growth, N and C reserves, and carbon and oxygen isotope composition in Scots pine hosts
文献类型：期刊论文
| 作者 | Yan, Cai-Feng1,2,3; Gessler, Arthur2,4,5; Rigling, Andreas2; Dobbertin, Matthias2; Han, Xing-Guo1,3; Li, Mai-He2,3 |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2016-05-01 |
| 卷号 | 36期号:5页码:562-575 |
| ISSN号 | 0829-318X |
| 关键词 | Mistletoes Nitrogen Nonstructural Carbohydrates Soluble Sugars Stable Carbon Isotope Stable Oxygen Isotope Starch |
| DOI | 10.1093/treephys/tpw024 |
| 英文摘要 | Most mistletoes are xylem-tapping hemiparasites, which derive their resources from the host's xylem solution. Thus, they affect the host's water relations and resource balance. To understand the physiological mechanisms underlying the mistletoe-host relationship, we experimentally removed Viscum album ssp. austriacum (Wiesb.) Vollmann from adult Pinus sylvestris L. host trees growing in a Swiss dry valley. We analyzed the effects of mistletoe removal over time on host tree growth and on concentrations of nonstructural carbohydrates (NSC) and nitrogen (N) in needles, fine roots and sapwood. In addition, we assessed the delta C-13 and delta O-18 in host tree rings. After mistletoe removal, delta C-13 did not change in newly produced tree rings compared with tree rings in control trees (still infected with mistletoe), but delta O-18 values increased. This pattern might be interpreted as a decrease in assimilation (A) and stomatal conductance (g(s)), but in our study, it most likely points to an inadequacy of the dual isotope approach. Instead, we interpret the unchanged delta C-13 in tree rings upon mistletoe removal as a balanced increase in A and g(s) that resulted in a constant intrinsic water use efficiency (defined as A/g(s)). Needle area-based concentrations of N, soluble sugars and NSC, as well as needle length, single needle area, tree ring width and shoot growth, were significantly higher in trees from which mistletoe was removed than in control trees. This finding suggests that mistletoe removal results in increased N availability and carbon gain, which in turn leads to increased growth rates of the hosts. Hence, in areas where mistletoe is common and the population is large, mistletoe management (e.g., removal) may be needed to improve the host vigor, growth rate and productivity, especially for relatively small trees and crop trees in xeric growth conditions. |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000377403300004 |
| 源URL | [http://210.72.129.5/handle/321005/122716]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Li, Mai-He |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Swiss Fed Res Inst WSL, Zuercherstr 111, CH-8903 Birmensdorf, Switzerland 3.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China 4.Leibniz Ctr Agr Landscape Res ZALF, Eberswalderstr 84, D-15374 Muncheberg, Germany 5.Berlin Brandenburg Inst Adv Biodivers Res BBIB, D-14195 Berlin, Germany |
| 推荐引用方式 GB/T 7714 | Yan, Cai-Feng,Gessler, Arthur,Rigling, Andreas,et al. Effects of mistletoe removal on growth, N and C reserves, and carbon and oxygen isotope composition in Scots pine hosts[J]. TREE PHYSIOLOGY,2016,36(5):562-575. |
| APA | Yan, Cai-Feng,Gessler, Arthur,Rigling, Andreas,Dobbertin, Matthias,Han, Xing-Guo,&Li, Mai-He.(2016).Effects of mistletoe removal on growth, N and C reserves, and carbon and oxygen isotope composition in Scots pine hosts.TREE PHYSIOLOGY,36(5),562-575. |
| MLA | Yan, Cai-Feng,et al."Effects of mistletoe removal on growth, N and C reserves, and carbon and oxygen isotope composition in Scots pine hosts".TREE PHYSIOLOGY 36.5(2016):562-575. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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