Physics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..24..281g&link_type=abstract
Advances in Space Research, Volume 24, Issue 3, p. 281-291.
Physics
Scientific paper
The greenhouse environment is a challenging artificial ecosystem in which it is possible to study selected plant/insect interaction in a controlled environment. Due to a combination of ``direct'' and ``indirect'' effects of CO2 enrichment on plant photosynthesis and plant development, canopy productivity is generally increased. In this paper, we discuss the effects of daytime and nighttime CO2 enrichment protocols on gas exchange of pepper plants (Capsicum annuum L, cv Cubico) grown in controlled environments. In addition, we present the effects of thrips, a common insect pest, on the photosynthetic and respiratory activity of these plant canopies. Carbon dioxide has diverse effects on the physiology and mortality of insects. However, our data indicate that thrips and whiteflies, at least, are not killed ``directly'' by CO2 levels used to enhance photosynthesis and plant growth. Together the data suggest that the insect population is affected ``indirectly'' by CO2 and that the primary effect of CO2 is via its effects on plant metabolism.
Bates Samuel
Dixon Mike A.
Grodzinski B.
Schmidt Manuel J.
Staines H.
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