Results 231 to 240 of about 100,255 (266)
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Root surface/leaf area ratios in arctic dwarf shrubs
Plant and Soil, 1983Individual shoots of the shrubs Ledum palustre L., Vaccinium uliginosum L., and Betula nana L. were severed from their parent plants beneath the moss surface in an Alaskan tussock tundra. These shoots remained one year in their original position in peat moss cushions without further disturbance. After this period fine root dry weight, fine root surface
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Leaf/sapwood area ratios in Scots pine show acclimation across Europe
Canadian Journal of Forest Research, 2001We tested the hypothesis that leaf/sapwood area ratios (S) in Scots pine (Pinus sylvestris L.) differ across Europe. Data from published records were collected and critically reviewed, and five new sites were studied to increase the overall sample size available for analyses.
Maurizio Mencuccini, Lorenzo Bonosi
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A near-infrared narrow-waveband ratio to determine Leaf Area Index in orchards
Remote Sensing of Environment, 2008Abstract An innovative index for LAI estimation over orchard canopies based on the combination of two near-infrared narrow wavebands (1050 nm and 1250 nm) is presented. The index is insensitive to physiological changes on the leaf level even under changing pheneological developmental stage.
S DELALIEUX +5 more
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Canadian Journal of Forest Research, 1990
High cuticular water loss, desiccation, and leaf mortality during winter in conifers at alpine timberline represent especially dramatic examples of the ecophysiological importance of cuticular transpiration. However, little research has been conducted on the winter water relations of forest trees, even though recent evidence suggests a potentially ...
Julian L. Hadley, William K. Smith
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High cuticular water loss, desiccation, and leaf mortality during winter in conifers at alpine timberline represent especially dramatic examples of the ecophysiological importance of cuticular transpiration. However, little research has been conducted on the winter water relations of forest trees, even though recent evidence suggests a potentially ...
Julian L. Hadley, William K. Smith
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Plant, Cell & Environment
ABSTRACTLeaf area to sapwood area ratio (AL/AS) influences carbon sequestration, community composition, and ecosystem functioning in terrestrial vegetation and is closely related to leaf economics and hydraulics. However, critical predictors of AL/AS are not well understood.
Pengcheng He +11 more
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ABSTRACTLeaf area to sapwood area ratio (AL/AS) influences carbon sequestration, community composition, and ecosystem functioning in terrestrial vegetation and is closely related to leaf economics and hydraulics. However, critical predictors of AL/AS are not well understood.
Pengcheng He +11 more
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Analysis of the causes of variability of the dry leaf mass-per-area ratio
Biology Bulletin Reviews, 2012The lamina dry mass-area ratio (LMA: Leaf Mass per Area) is a very variable characteristic. Leaf dry mass consists of symplast mass (the set of all leaf protoplasts) and apoplast mass (the set of all cell walls in a leaf). The ratio between symplast and apoplast masses is positively related to any functional leaf trait calculated per unit of dry mass ...
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Succession May Maintain High Leaf Area: Sapwood Ratios and Productivity in OldSubalpine Forests
Ecosystems, 2000Old forests are generally believed to exhibit low net primary productivity (NPP) and therefore to be insignificant carbon sinks. This relationship between age and NPP is based, in part, on the hypothesis that the biomass of respiratory tissues such as sapwood increases with age to a point where all photosynthate is required just to maintain existing ...
Ragan M. Callaway +2 more
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Crop Science, 2002
Remote sensing may provide a more precise method to estimate the impacts of foliar pathogens on alfalfa (Medicago sativa L.) yield, green leaf area index (GLAI), and leaf‐to‐stem ratio compared with the traditional visual estimation methods such as percentage defoliation.
Jie Guan, Forrest W. Nutter
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Remote sensing may provide a more precise method to estimate the impacts of foliar pathogens on alfalfa (Medicago sativa L.) yield, green leaf area index (GLAI), and leaf‐to‐stem ratio compared with the traditional visual estimation methods such as percentage defoliation.
Jie Guan, Forrest W. Nutter
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Grape Berry Mineral Composition in Relation to Vine Water Status & Leaf Area/Fruit Ratio
2009Aim : The results presented in this review come from an original study on the accumulation of potassium, calcium, magnesium and sodium in berries on vines submitted to different water status treatments. This study was carried out during the 2006 season on young (4 year old) vines of Grenache Noir (clone 134) grafted onto Richter 110 grown on clay ...
Etchebarne, Flor +2 more
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Canadian Journal of Botany, 1965
The increase in the leaf area ratio during early growth and the later decrease were primarily caused by an initial increase in the growth of leaves relative to stems and roots and a later rapid increase in stem growth associated with flowering. Changes in leaf thickness with time had little effect on the leaf area ratio.Increasing temperature from 10 ...
D. J. C. Friend +2 more
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The increase in the leaf area ratio during early growth and the later decrease were primarily caused by an initial increase in the growth of leaves relative to stems and roots and a later rapid increase in stem growth associated with flowering. Changes in leaf thickness with time had little effect on the leaf area ratio.Increasing temperature from 10 ...
D. J. C. Friend +2 more
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