Trees

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Functional and ecosystem service differences between tree species: implications for tree species replacement
Trees - Tập 35 - Trang 307-317 - 2020
R. J. Mitchell, R. L. Hewison, R. K. Haghi, A. H. J. Robertson, A. M. Main, I. J. Owen
Tree species differ in their functioning at the scale of an individual tree which will result in differences in ecosystem service provision. Replacement trees for diseased trees should take account of functional differences. Globally tree species composition is changing due to species loss from pests and pathogens. The impact of this change on ecological functioning is rarely tested. Using six sit...... hiện toàn bộ
Dendroclimatic evaluation of climate-growth relationships of Meyer spruce (Picea meyeri) on a sandy substrate in semi-arid grassland, north China
Trees - Tập 15 - Trang 230-235 - 2001
Eryuan Liang, Xuemei Shao, Yuxi Hu, Jinxing Lin
Dendroclimatic techniques were used to assess the climate–growth relationships of refugial Meyer spruce (Picea meyeri Rehd. et Wils.) on a sandy substrate in semi-arid grassland of north China. Statistical analysis of the tree-ring data showed a mean series intercorrelation of 0.47, a signal-to-noise ratio of 14.44, and a mean sensitivity of 0.18, indicating suitability for climatic analysis. Rad...... hiện toàn bộ
Isolation and expression analysis of four members of the plasma membrane H+-ATPase gene family in Hevea brasiliensis
Trees - - 2015
Jiahong Zhu, Jing Xu, Wenjun Chang, Zhili Zhang
Poplar stems show opposite epigenetic patterns during winter dormancy and vegetative growth
Trees - Tập 27 - Trang 311-320 - 2012
Daniel Conde, Pablo González-Melendi, Isabel Allona
In this study the identification of epigenetic marks of closed and open chromatin states has been performed by immunofluorescence in vibratome-thick sections from poplar stems, followed by quantification of the signal in a representative population of individual nuclei on a confocal microscope. Unlike other methods often used for detection of global DNA methylation levels, the procedure hereby pro...... hiện toàn bộ
Cytomixis in shoot apex of Norway spruce [Picea abies (L.) Karst.]
Trees - Tập 18 - Trang 722-724 - 2004
Marzenna Guzicka, Adam Wozny
Atypical cell walls and nuclei were observed in the apex of Norway spruce shoots from late April to early May on the material collected from a few grafts of a clone of Norway spruce growing on an experimental area. Images of ultrastructure attest to cytomixis. The phenomenon of cytomixis has previously been described in various plant material, both in the meiotic and mitotic cells, but this is the...... hiện toàn bộ
Patterns of cytokinins and leaf gas exchange among canopy layers of a mature sugar maple (Acer saccharum) stand
Trees - Tập 21 - Trang 181-189 - 2006
Ian Reeves, Scott C. Farrow, R. J. Neil Emery
Leaf cytokinins (CKs) were profiled within four locations throughout the inner and outer layers of a mature sugar maple (Acer saccharum) canopy. Leaf CK was associated with leaf gas exchange activity and some corresponding microclimate variables. Both inner and outer layers in the upper canopy had higher concentrations of leaf CKs than the lower canopy layers and the difference was comprised prima...... hiện toàn bộ
Cambial activity in the understory of the Mayombe forest, DR Congo
Trees - Tập 31 - Trang 49-61 - 2016
Tom De Mil, Bhély Angoboy Ilondea, Selwin Maginet, Jeroen Duvillier, Joris Van Acker, Hans Beeckman, Jan Van den Bulcke
Understanding species-specific response as well as wedging and zero xylem growth is vital for tree-ring analysis of tropical understory trees. Knowledge on intra-annual xylem growth remains understudied in tropical regions, especially for understory species. However, it is important to disentangle seasonal tree response in this complex environment. The aim is to...... hiện toàn bộ
Relating water use to morphology and environment of Nothofagus from the world’s most southern forests
Trees - Tập 28 - Trang 125-136 - 2013
Sebastian Pfautsch, Pablo L. Peri, Craig Macfarlane, Floris van Ogtrop, Mark A. Adams
This study is the first to quantify tree water use below 50°S. Tree morphology differs markedly among the two investigated species, reflecting adjustment to different environmental cues. A pronounced environmental gradient dictates the dominance of Nothofagus in the foothills on the eastern side of the Andes Mountains in Patagonia, Argentina. Below 50° southern...... hiện toàn bộ
Nitrogen source utilization in co-existing canopy tree and dwarf bamboo in a northern hardwood forest in Japan
Trees - Tập 34 - Trang 1047-1057 - 2020
Ryunosuke Tateno, Masataka Nakayama, Midori Yano, Karibu Fukuzawa, Yoshiyuki Inagaki, Keisuke Koba, Shin Ugawa
Understory dwarf bamboo mitigated soil N competition with co-existing canopy oak trees by foraging in deeper soils and increasing dependence on N forms that differ from those used by canopy trees. Nitrogen (N) competition among co-existing plant species utilizing different mycorrhiza types was explored through the investigation of N sources of oak trees and dwarf bamboo. Vertical distribution of f...... hiện toàn bộ
Sucrose phosphate synthase in leaves of mistletoe: its regulation in relation to host (Abies alba) and season
Trees - Tập 17 - Trang 221-227 - 2003
Xuemei Li, Michael Pfiz, Manfred Küppers, Werner Einig, Heinz Rennenberg, Rüdiger Hampp
Sucrose-phosphate synthase (SPS; E.C. 2.4.1.14) was studied in 1-year-old leaves of the xylem-parasitic mistletoe (Viscum album L.), growing on Abies alba. Glucose-6-phosphate served as an allosteric activator of mistletoe SPS, increasing the affinity for both substrates, fructose-6-phosphate and UDP-glucose. The activation state of SPS, i.e. the ratio of substrate limited versus non-limited acti...... hiện toàn bộ
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