DOI: 10.1016/j.foreco.2017.01.015
Scopus记录号: 2-s2.0-85010375879
论文题名: Content of far-red light in supplemental light modified characteristics related to drought tolerance and post-planting growth in Scots pine seedlings
作者: Riikonen J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 390 起始页码: 8
结束页码: 14
语种: 英语
英文关键词: Field performance
; Gas exchange
; Morphology
; Pinus sylvestris
; Red-to-far-red ratio
; Spectral composition
Scopus关键词: Agronomy
; Forestry
; Light emitting diodes
; Morphology
; Needles
; Field performance
; Gas exchange
; Pinus sylvestris
; Red to far-red ratio
; Spectral composition
; Seed
; coniferous tree
; drought resistance
; field survey
; foliage
; gas exchange
; growth
; light effect
; light quality
; morphology
; photosynthesis
; root system
; seeding
; seedling
; spectral analysis
; water use efficiency
; Pinus sylvestris
英文摘要: Light quality affects the morphological development of a plant. The aim of the experiment was to examine the effect of far-red radiation (FR, 700–800 nm) on growth, morphology, and root growth capacity (RGC) in Scots pine seedlings originating from latitudes 61°N and 67°N, and on gas exchange and subsequent field growth in seedlings originating from 61°N. The seedlings were grown in a greenhouse under natural daylight, receiving either FR-rich (+FR) or FR-deficient (−FR) supplemental light for 20 h per day, provided using light-emitting diodes (LEDs). The seedlings were outplanted and grown in the field for two growing seasons. Growth under +FR hastened terminal bud formation in seedings originating from 61°N, and delayed it in seedlings from 67°N. At the end of the growth period under the LEDs, +FR seedlings were dominated by secondary needles and had a higher needle mass than −FR seedlings, whose foliage comprised mainly primary needles. −FR improved root growth capacity in the seedlings originating from 61°N, but not in seedlings originating from 67°N. In seedlings from 61°N, photosynthesis (Pn) at the needle area level was higher and stomatal conductance lower under −FR, resulting in higher water use efficiency than under +FR. Due to the greater amount of photosynthetic tissue under +FR, the whole-seedling-level Pn was higher under +FR. Height and diameter growth were greater in −FR seedlings than in +FR seedlings during the second growing season. Growth habit and growth rate of Scots pine seedlings can be manipulated by controlling the FR content in the supplemental light, enabling production of seedlings targeted for outplanting on sites with specific characteristics. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64444
Appears in Collections: 影响、适应和脆弱性
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作者单位: Natural Resources Institute Finland (Luke), Green Technology, Suonenjoki, Finland
Recommended Citation:
Riikonen J.. Content of far-red light in supplemental light modified characteristics related to drought tolerance and post-planting growth in Scots pine seedlings[J]. Forest Ecology and Management,2017-01-01,390