Journal ArticleDOI
Ecophysiological investigations on wild and cultivated plants in the Negev Desert : I. Methods: A mobile laboratory for measuring carbon dioxide and water vapour exchange.
TLDR
Carbon dioxide exchange and transpiration measurements of various wild and cultivated plants were carried out during the dry summer period in 1967 in the Central Negev Desert (Israel) using a mobile laboratory used for investigations.Abstract:
Carbon dioxide exchange and transpiration measurements of various wild and cultivated plants were carried out during the dry summer period in 1967 in the Central Negev Desert (Israel). A mobile laboratory used for these investigations is described. Measurements were carried out with conditioned plant chambers which followed either the ambient temperature and humidity or else allowed the experiments to be carried out under constant conditions. The accuracy of the measurements was estimated. The mean error of the determination of the CO2 exchange rate amounts to ±0.07 mg CO2·g-1·h-1. Transpiration rate is measured with an error of ±0.15 g H2O·g-1·h-1. The response time of the instrumentation to reach 90% equilibrium after a change in photosynthesis or transpiration is 7 to 9 minutes. Errors which are caused by changes of quality of incident radiant energy and altered turbulence conditions for the leaves enclosed in the chamber, are discussed.read more
Citations
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Journal ArticleDOI
Carbon dioxide exchange of Alnus rubra
TL;DR: In this article, a nonlinear model relating CO2 exchange to light and temperature is derived from experimental curves determined in other investigations, which are useful for comparing responses to light, population heterogeneity, or species variation.
Book ChapterDOI
Stomatal Responses, Water Loss and CO2 Assimilation Rates of Plants in Contrasting Environments
Ernst Detlef Schulze,A. E. Hall +1 more
TL;DR: The stomatal aperture appears to be controlled by complex mechanisms which operate to maintain a variable balance between allowing CO2 uptake to proceed, while restricting the loss of water vapor, and preventing leaf desiccation as mentioned in this paper.
BookDOI
Handbook of Photosynthesis
TL;DR: The principles of Photosynthesis Mechanisms, Mechanisms of Photosynthetic Oxygen Evolution and the Fundamental Hypotheses of photosynthesis, and Recent Advances in Chloroplast Development in Higher Plants are explained.
Journal ArticleDOI
Coping with Herbivory: Photosynthetic Capacity and Resource Allocation in Two Semiarid Agropyron Bunchgrasses,
TL;DR: It is suggested that culms from which leaf blades have been removed should be of considerable value to defoliated bunchgrasses, and in the case of partial defoliation could provide important supplies of organic nutrients for regrowth.
Journal ArticleDOI
Canopy transpiration and water fluxes in the xylem of the trunk of Larix and Picea trees - a comparison of xylem flow, porometer and cuvette measurements
Ernst Detlef Schulze,Jan Cermak,M. Matyssek,M. Penka,Reiner Zimmermann,F. Vasícek,W. Gries,J. Kucera +7 more
TL;DR: Investigation of the daily water balance of intact, naturally growing, adult Larix and Picea trees without major injury found that plant water status recovers with the decrease of transpiration and the refilling of the water storage sites.
References
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Journal ArticleDOI
Absorption of light by chlorophyll solutions
TL;DR: This paper deals with the estimation of chlorophyll in plant extracts by application of absorption coefficients of the isolated solid chlorophylla components, and the question of artifacts is automatically clarified.
Journal ArticleDOI
The Negev: The Challenge of a Desert
Journal ArticleDOI
Die Isolierung und quantitative Bestimmung der Carotinoide und Chlorophylle von Blättern, Algen und isolierten Chloroplasten mit Hilfe dünnschichtchromatographischer Methoden
A. Hager,T. Meyer-Bertenrath +1 more
TL;DR: In this article, the authors propose a method for quantitativen bestimmung of Chlorophylle and Carotinoide angegeben, which is based on the extraktion der Farbstoffe aus Algen, Blattern or Chloroplasten.
Journal ArticleDOI