Results 271 to 280 of about 392,191 (304)
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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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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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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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Predicting plant leaf area production: shoot assimilate accumulation and partitioning, and leaf area ratio, are stable for a wide range of sorghum population densities [PDF]
, 2002 Predicting plant leaf area production is required for modelling carbon balance and tiller dynamics in plant canopies. Plant leaf area production can be studied using a framework based on radiation intercepted, radiation use efficiency (RUE) and leaf area ratio (LAR) (ratio of leaf area to net above-ground biomass).
Lafarge, T. A., Hammer, Graeme L.
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Global variation in the ratio of sapwood to leaf area explained by optimality principles
2023The sapwood area supporting a given leaf area (vH) reflects a coordinated coupling between carbon uptake, water transport and loss at a whole plant level. Worldwide variation in vH reflects diverse plants strategies adapt to prevailing environments, and impact the evolution of global carbon and water cycles.
Huiying Xu +10 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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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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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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Oecologia, 1987
Partitioning patterns in 22 exclusively low and 27 exclusively high altitude perennial herbaceous species were examined in order to test the hypothesis that plants of high altitudes allocate more dry matter to below-ground parts and in particular to storage organs, than typical low altitude plants.
Ch, Körner, U, Renhardt
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Partitioning patterns in 22 exclusively low and 27 exclusively high altitude perennial herbaceous species were examined in order to test the hypothesis that plants of high altitudes allocate more dry matter to below-ground parts and in particular to storage organs, than typical low altitude plants.
Ch, Körner, U, Renhardt
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