Open-System Chamber for Measurements of Gas Exchanges at Plant Level

2006 ◽  
Vol 40 (6) ◽  
pp. 1950-1955 ◽  
Author(s):  
Giovanni Alterio ◽  
Pasquale Giorio ◽  
Giuseppe Sorrentino
Keyword(s):  
Open System ◽  
Gas Exchanges ◽  
Plant Level

Field Evaluation of Open System Chambers for Measuring Whole Canopy Gas Exchanges

2014 ◽  
Vol 106 (2) ◽  
pp. 537-544 ◽  
Author(s):  
Jeffrey T. Baker ◽  
Dennis C. Gitz ◽  
Robert J. Lascano
Keyword(s):  
Open System ◽  
Field Evaluation ◽  
Gas Exchanges

scholarly journals Photosynthetic Activity of Four Florist Azalea Cultivars

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 682a-682
Author(s):  
C. Bellert ◽  
F. Gauthier ◽  
B. Dansereau
Keyword(s):  
Open System ◽  
Photosynthetic Activity ◽  
Photosynthetic Capacity ◽  
Dark Respiration ◽  
Model Parameters ◽  
Whole Plant ◽  
Leaf Level ◽  
Plant Level ◽  
Photosynthetic Assimilation ◽  
The Individual

The photosynthetic activity of four Rhododendron simsii cultivars `Dorothy Gish', `Paloma', `White Gish', and `Gloria' were studied at both the individual leaf level using a portable photosynthesis system (closed), or at the whole-plant level using assimilation chambers (semi-open system). Net photosynthetic assimilation curves in response to light in both systems will be established. The experimental points obtained will be adjusted to a photosynthetic model as described in the literature. The model parameters [original efficiency (α) dark respiration (Rd), maximum photosynthetic capacity to saturated light (Pmax)] will be presented. The evolution of these parameters will be presented as a function of the various stages of development. Also a comparison of the four cultivars will be shown.

Carbon Dioxide Control in an Open System that Measures Canopy Gas Exchanges

2014 ◽  
Vol 106 (3) ◽  
pp. 789-792 ◽  
Author(s):  
Jeffrey T. Baker ◽  
Dennis C. Gitz ◽  
Paxton Payton ◽  
Katrina J. Broughton ◽  
Michael P. Bange ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Open System ◽  
Gas Exchanges

EFFETS D’UNE MORPHACTINE, LE CHLORFLURENOL IT-3456, SUR LA CROISSANCE ET LES ECHANGES GAZEUX DU TOURNESOL KRASNODARETS

1985 ◽  
Vol 65 (3) ◽  
pp. 533-541 ◽  
Author(s):  
DANIEL LORD ◽  
HENRI-P. THERRIEN ◽  
PIERRE-A. DUBÉ
Keyword(s):  
Growth Inhibition ◽  
Chlorophyll Content ◽  
Chlorophyll A ◽  
Open System ◽  
The Other ◽  
Gas Exchanges ◽  
Échanges Gazeux ◽  
Chlorophyll A And B

A morphactin, the chlorflurenol IT-3456 (CFL), was applied to sunflower in order to evaluate its effects on growth, chlorophyll content and rates of photosynthesis, respiration and transpiration. At the concentrations used in the experiments (50, 100, 200, 300 ppm) growth inhibition and morphogenic effects of CFL were evident. However, this morphactin did not significantly decrease the fresh and dry weights of plants. The treatment at the lowest concentration of CFL (50 ppm) stimulated chlorophyll a and b synthesis while the other treatments had no effect. An open system to measure the gas exchanges of sunflower leaves was used to calculate the rates of photosynthesis, respiration and transpiration. Rates of these processes were not significantly affected by the application of different concentrations of CFL. It is suggested that the growth inhibition of plants treated with CFL owes more to an effect at the partition level of the new photosynthates rather than by an alteration of the photosynthesis mechanisms.Key words: Morphactin, chlorflurenol, photosynthesis, respiration, transpiration, sunflower

Library as a Complex Open System

2012 ◽  
Vol 3 (2) ◽  
pp. 160-161
Author(s):  
JIGAR L DAVE ◽  
Keyword(s):  
Open System

Radiometric dating of hillslope calcrete in the Negev Desert, Israel

2008 ◽  
Vol 104 (11/12) ◽  
Author(s):  
J.C. Vogel ◽  
M.A. Geyh
Keyword(s):  
Open System ◽  
Negev Desert ◽  
Radiometric Dating ◽  
Jordan Valley ◽  
Partial Recrystallization ◽  
Uranium Series ◽  
Uranium Series Dating

The radiometric dating of calcrete is often problematical because impurities and open system conditions affect the apparent ages obtained. By applying both radiocarbon and uranium-series dating to calcrete in colluvium, it is shown that such conditions can be identified. In correlation with the stratigraphy, it is found that partial recrystallization severely decreases the radiocarbon ages of the upslope and shallower samples further down, whereas incorporation of limestone fragments from bedrock significantly increases the apparent ages of some of the uranium-series samples. It is concluded that the hillslope calcrete at the study site near Sede Beker in the Negev Desert, Israel, mainly developed shortly after 40 kyr ago, at a time when the Jordan Valley was being inundated to form the fossil Lake Lisan. Since their formation would have required higher rainfall than today, the results provide further evidence that the whole region was experiencing an increase in precipitation.

Effect of Simulated Acid Rain on Gas Exchanges of Three Compositae Invasive Plants

2013 ◽  
Vol 48 (2) ◽  
pp. 160-167
Author(s):  
Song Liying ◽  
Ke Zhanhong ◽  
Sun Lanlan ◽  
Peng Changlian
Keyword(s):  
Acid Rain ◽  
Invasive Plants ◽  
Simulated Acid Rain ◽  
Gas Exchanges
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