DOI: 10.1016/j.foreco.2013.07.007
Scopus记录号: 2-s2.0-84881013219
论文题名: Tolerance of peat-grown Scots pine seedlings to waterlogging and drought: Morphological, physiological, and metabolic responses to stress
作者: Pearson M. ; Saarinen M. ; Nummelin L. ; Heiskanen J. ; Roitto M. ; Sarjala T. ; Laine J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 307 起始页码: 43
结束页码: 53
语种: 英语
英文关键词: Drought
; Peat
; Scots pine seedlings
; Tolerance
; Waterlogging
Scopus关键词: Controlled conditions
; Extreme weather events
; Forestry-drained peatlands
; Permanent wilting points
; Photochemical efficiency
; Root hydraulic conductance
; Scots pine seedlings
; Waterlogging
; Cultivation
; Fits and tolerances
; Metabolism
; Needles
; Peat
; Physiological models
; Reforestation
; Seed
; Soils
; Drought
; coniferous tree
; drought
; drought resistance
; ecomorphology
; environmental stress
; growth response
; hydraulic conductivity
; metabolism
; peat
; photochemistry
; physiological response
; phytochemistry
; regeneration
; root system
; seedling
; tolerance
; water availability
; waterlogging
英文摘要: Depending on the soil preparation method applied and peat characteristics, Scots pine (Pinus sylvestris L.) seedlings planted in prepared spots on forestry-drained peatlands may become more susceptible to extreme weather events such as drought or flooding. Only by studying its coping strategies can we eventually design methodology better suited for Scots pine regeneration on peat soils. In this study, we evaluated the tolerance of two-year-old seedlings to the two extremes of water-associated stress, drought and waterlogging, in unprocessed peat. Over one growing season in controlled conditions, drought distinctly reduced root and shoot growth in addition to photochemical efficiency (Fv/Fm) particularly in previous-year needles, whilst wet stress had little discernible impact. Drought also influenced polyamine metabolism by increasing free putrescine and spermine concentrations especially in current-year needles, whereas no impact was discerned in the wet treatment. Furthermore, reduced root hydraulic conductance (Kr) was observed in drought-stressed root systems. Apparently, waterlogging does not modify Scots pine seedling growth or vitality immediately, but rather in the longer term. However, no fatalities occurred in either of the stress treatments, this despite water availability in the Sphagnum peat reaching its lower (permanent wilting point) and upper (10% soil air content) limits. Maintenance of rather high photochemical efficiency despite severe drought stress would seem to indicate a potential for seedling recovery if water availability in the peat substrate improved. © 2013 Elsevier B.V.. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66373
Appears in Collections: 影响、适应和脆弱性
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作者单位: Finnish Forest Research Institute, Western Finland Regional Unit, Kaironiementie 15, 39700 Parkano, Finland; University of Helsinki, Department of Forest Sciences, P.O. Box 27, 00014 Helsinki, Finland; Finnish Forest Research Institute, Eastern Finland Regional Unit, Juntintie 154, 77600 Suonenjoki, Finland; Finnish Forest Research Institute, Eastern Finland Regional Unit, P.O. Box 68, 80101 Joensuu, Finland
Recommended Citation:
Pearson M.,Saarinen M.,Nummelin L.,et al. Tolerance of peat-grown Scots pine seedlings to waterlogging and drought: Morphological, physiological, and metabolic responses to stress[J]. Forest Ecology and Management,2013-01-01,307