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DEVELOPMENTAL CHANGES IN ANATOMY, MORPHOLOGY AND BIOCHEMISTRY OF LAYIA PLATYGLOSSA EXPOSED TO ELEVATED CARBON DIOXIDE
Author(s) -
Omer Lucy St.,
Horvath Steven M.
Publication year - 1984
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1984.tb14176.x
Subject(s) - biology , vascular tissue , carbon dioxide , botany , morphology (biology) , anatomy , zoology , ecology
Studies investigating developmental anatomical changes in Layia platyglossa exposed to four CO 2 levels—0.03, 0.07, 0.14, 0.21%—revealed significant differences in vascular tissue development in leaf and stem. Lateral root vascular structures were unchanged at the elevated CO 2 concentrations. Plastochron intervals indicated higher growth rates with increasing CO 2 levels. Primary differentiation of vascular and ground tissues in young stems occurred closer to the promeristem at the lower CO 2 concentrations indicating less rapid growth patterns. Biochemical assays revealed that the contents of nucleic acids and chlorophyll in young leaves were unaffected while the levels of protein increased with elevated CO 2 concentrations.