Hydraulic limitations imposed by crown placement determine final size and shape of Quercus rubra L. leaves
نویسندگان
چکیده
منابع مشابه
Loss of hydraulic conductivity due to water stress in intact juveniles of Quercus rubra and Populus deltoides.
Despite many studies of the percent loss of hydraulic conductivity in excised branches, there is doubt as to whether cutting stems in air introduces unnatural embolism into the xylem at the cut surface. To address this question, hydraulic conductivity was measured in seedlings of northern red oak (Quercus rubra L.) and rooted scions of eastern cottonwood (Populus deltoides Bartr. ex Marsh.) tha...
متن کاملCompetitive Capacity of Quercus rubra L. Planted in Arkansas' Boston Mountains
Results of an 11 yr study of the growth and survival of planted northern red oak (Quercus rubra L.) seedlings (2-0 bare-root) are presented. More than 4,000 seedlings were planted under shelterwood overstories that were harvested 3 yr after planting. Results are expressed as planted-tree dominance probabilities. Dominance probability is the probability that a planted tree will live to attain a ...
متن کاملPhotosynthesis and the Xanthophyll Cycle-mediated Photoprotection in Leaves of Quercus Rubra and Q. Alba Seedlings of Different Light Environments
Two and three years after the outplanting of 1-O northern red oak (Quercus rubra, NRO) and white oak (Q. ulba, WO) nursery stocks, the highest net photosynthetic rates (A-) were observed from seedlings growing on a clearcut site followed by those under a pine stand. Both NRO and WO seedlings under a hardwood stand had A, less than 10% of the full sun seedling A,,. Oaks grown under hardwoods inc...
متن کاملLight response of hydraulic conductance in bur oak (Quercus macrocarpa) leaves.
A four- to seven-fold enhancement of leaf hydraulic conductance by light has been reported in three temperate tree species. The enhancement occurs in the liquid-flow pathway between the petiole and the site of water evaporation. The enhancement occurs within 1 h, and dissipates in darkness over a period of 1 to 10 h depending on species. Here we report light-induced enhancement of leaf hydrauli...
متن کاملFunctional design space of single-veined leaves: role of tissue hydraulic properties in constraining leaf size and shape.
BACKGROUND AND AIMS Morphological diversity of leaves is usually quantified with geometrical characters, while in many cases a simple set of biophysical parameters are involved in constraining size and shape. One of the main physiological functions of the leaf is transpiration and thus one can expect that leaf hydraulic parameters can be used to predict potential morphologies, although with the...
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ژورنال
عنوان ژورنال: Plant, Cell and Environment
سال: 2004
ISSN: 0140-7791,1365-3040
DOI: 10.1111/j.1365-3040.2003.01153.x