منابع مشابه
Maturing Pine Tracheids
The cytoplasm of the interior of maturing pine tracheids is revealed by scanning electron microscopy as a lamellate and filamentous intravacuolar reticulum immersed in vacuolar sap. Formation of cytoplasmic spherules and the breakdown of the cytoplasmic reticulum initiate protoplast disintegration that terminates in tracheid maturation. The process is believed to involve vacuolar membrane trans...
متن کاملFluorescence microscopy for measuring fibril angles in pine tracheids.
—Observation and measurement of fibril angles in increment cores or similar small samples from living pine trees was facilitated by the use of fluorescence microscopy. Although some autofluorescence was present, brighter images could be obtained by staining the specimens with a 0.1% aqueous solution of a fluoro chrome (Calcozine flavine TG extra concentrated, Calcozine red 6G extra, rhodamine ...
متن کاملMultiscale model intercomparisons of CO2 and H2O exchange rates in a maturing southeastern US pine forest
We compared four existing process-based stand-level models of varying complexity (physiological principles in predicting growth, photosynthesis and evapotranspiration, biogeochemical cycles, and stand to ecosystem carbon and evapotranspiration simulator) and a new nested model with 4 years of eddy-covariance-measured water vapor (LE) and CO2 (Fc) fluxes at a maturing loblolly pine forest. The n...
متن کاملKnowledge Maturing Services: Supporting Knowledge Maturing in Organisational Environments
The changes in the dynamics of the economy and the corresponding mobility and fluctuations of knowledge workers within organizations make continuous social learning an essential factor for an organization. Within the underlying organizational processes, Knowledge Maturing refers to the the corresponding evolutionary process in which knowledge objects are transformed from informal and highly con...
متن کاملSize and function in conifer tracheids and angiosperm vessels.
The wide size range of conifer tracheids and angiosperm vessels has important consequences for function. In both conduit types, bigger is better for conducting efficiency. The gain in efficiency with size is maximized by the control of conduit shape, which balances end-wall and lumen resistances. Although vessels are an order of magnitude longer than tracheids of the same diameter, they are not...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 1973
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.56.1.263