A canopy porometer for photosynthesis studies in field crops

1984 ◽  
Vol 62 (2) ◽  
pp. 290-295 ◽  
Author(s):  
Paul F. Daley ◽  
Conrad F. Cloutier ◽  
Jeremy N. McNeil
Keyword(s):  
Carbon Dioxide ◽  
Gas Exchange ◽  
Temperature Measurement ◽  
Water Vapour ◽  
Operating Characteristics ◽  
Respiratory Gas Exchange ◽  
Field Crops ◽  
Whole Plant ◽  
Chamber Light

A portable, modular porometer for whole-plant or canopy photosynthetic and respiratory gas exchange estimation is described. The system features within-chamber light and temperature measurement and in its present configuration permits analysis of carbon dioxide and water vapour exchange by an extension of the syringe-based "CO2 depletion" technique. Operating characteristics of the system and potential modifications are discussed, along with limitations and applications.

THE INFLUENCE OF OXYGEN AND CARBON DIOXIDE ON THE SPIRACLES OF A WOOD-BORING INSECT, ORTHOSOMA BRUNNEUM (FORSTER) (COLEOPTERA: CERAMBYCIDAE)

1963 ◽  
Vol 41 (6) ◽  
pp. 1149-1167 ◽  
Author(s):  
U. Paim ◽  
W. E. Beckel
Keyword(s):  
Carbon Dioxide ◽  
Gas Exchange ◽  
Small Amplitude ◽  
External Respiration ◽  
Free Living ◽  
Atmospheric Air ◽  
Respiratory Gas Exchange ◽  
Moist Environment ◽  
Boring Insect ◽  
Wood Boring

The respiratory gas exchange and the function of the spiracles in all stadia of Orthosoma brunneum are investigated. CO2 is released discontinuously from the prepupae, pupae, resting adults, and molting larvae while the animals are in atmospheric air. The spiracular valve of the prepupae and pupae flutters irregularly within a small amplitude in air. At intervals corresponding to the CO2 bursts the flutter amplitude increases. Intubation of one to two spiracles stops both CO2 bursts and the wide opening of the spiracles. In 4% ambient O2 or in 14% CO2 the spiracles open widely and the CO2 bursts are eliminated. Apparently, in this insect, inhabiting a moist environment, the spiracular control of external respiration is as highly developed as in free-living insects.

Respiratory Gas Exchange and Growth of Bonin Petrel Embryos

1982 ◽  
Vol 55 (2) ◽  
pp. 162-170 ◽  
Author(s):  
Ted N. Pettit ◽  
Gilbert S. Grant ◽  
G. Causey Whittow ◽  
Hermann Rahn ◽  
Charles V. Paganelli
Keyword(s):  
Gas Exchange ◽  
Respiratory Gas Exchange

scholarly journals Band Emissivities of Carbon Dioxide and Water Vapour

1966 ◽  
Vol 32 (243) ◽  
pp. 1718-1725
Author(s):  
Ryozo ECHIGO ◽  
Niichi NISHIWAKI ◽  
Masaru HIRATA
Keyword(s):  
Carbon Dioxide ◽  
Water Vapour
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