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DOI | 10.1016/j.foreco.2018.04.008 |
Biophysical changes in the roots of Scots pine seedlings during cold acclimation and after frost damage | |
Di, Bao1,2; Luoranen, Jaana3; Lehto, Tarja4; Himanen, Katri3; Silvennoinen, Martti5,6; Silvennoinen, Raimo6; Repo, Tapani1 | |
2019 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2019 |
卷号 | 431页码:63-72 |
文章类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | Finland; Peoples R China |
英文摘要 | Root system health is a key factor for seedling quality and it is a prerequisite for the proper growth of seedlings after out-planting. If the seedlings are moved to freezer storage too early in the season, roots can be damaged and thereby the quality of seedlings declines. We aimed to develop a novel method to assess an appropriate time for moving the seedlings to freezer storage in the autumn and to detect possible root damage during overwintering. One-year-old containerized Scots pine seedlings were measured before, during and after freezer storage, and after a series of frost exposure tests. The electrical impedance spectra (from 4 kHz to 200 kHz) of roots changed during cold acclimatization. The impedance loss factor (delta) of roots at 50 kHz frequency decreased when the threshold of frost tolerance was exceeded in the freezing tests. Root hydraulic conductance (K-r) increased before and during the freezer storage. In the initial phase of cold acclimatization, K-r increased considerably after exposure to frost temperatures, indicating damage, but that effect disappeared with frost hardening. In regrowth tests, the largest number of new root tips was observed after exposure to -12 degrees C in the freezing tests just before and after freezer storage, and after exposure to -30 degrees C during the freezer storage. During the freezer storage, shoot growth declined at higher exposure temperatures than root tip formation, suggesting that roots and specifically root tips would not be the primary reason for declined shoot growth. We conclude that the biophysical measurements of roots are useful for assessing the condition of the root system for overwintering applications in tree seedling nurseries, and that roots tolerated lower temperatures than previously thought. |
英文关键词 | Freezer storage Frost hardiness Hydraulic conductance Impedance loss factor Pinus sylvestris Visual scoring |
领域 | 气候变化 |
收录类别 | SCI-E ; ISTP |
WOS记录号 | WOS:000450379500008 |
WOS关键词 | ELECTRICAL-IMPEDANCE SPECTROSCOPY ; PICEA-ABIES SEEDLINGS ; SUB-ARCTIC CONDITIONS ; FREEZE-THAW INJURY ; NORWAY SPRUCE ; CHLOROPHYLL FLUORESCENCE ; HYDRAULIC CONDUCTANCE ; ELECTROLYTE LEAKAGE ; PLASMA-MEMBRANE ; GROWTH CAPACITY |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24260 |
专题 | 气候变化 |
作者单位 | 1.Nat Resources Inst Finland Luke, Nat Resources, POB 68, FI-80100 Joensuu, Finland; 2.Agr Univ Hebei, Dept Hort, Baoding 071001, Hebei, Peoples R China; 3.Nat Resources Inst Finland Luke, Prod Syst, Juntintie 154, FI-77600 Suonenjoki, Finland; 4.Univ Eastern Finland, Sch Forest Sci, POB 111, FI-80101 Joensuu, Finland; 5.Univ Eastern Finland, Dept Phys & Math, POB 111, FI-80101 Joensuu, Finland; 6.Simitec Ltd, Joensuu, Finland |
推荐引用方式 GB/T 7714 | Di, Bao,Luoranen, Jaana,Lehto, Tarja,et al. Biophysical changes in the roots of Scots pine seedlings during cold acclimation and after frost damage[J]. FOREST ECOLOGY AND MANAGEMENT,2019,431:63-72. |
APA | Di, Bao.,Luoranen, Jaana.,Lehto, Tarja.,Himanen, Katri.,Silvennoinen, Martti.,...&Repo, Tapani.(2019).Biophysical changes in the roots of Scots pine seedlings during cold acclimation and after frost damage.FOREST ECOLOGY AND MANAGEMENT,431,63-72. |
MLA | Di, Bao,et al."Biophysical changes in the roots of Scots pine seedlings during cold acclimation and after frost damage".FOREST ECOLOGY AND MANAGEMENT 431(2019):63-72. |
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