|Title||Photosynthetic pathway types of evergreen rosette plants (Liliaceae) of the Chihuahuan Desert|
|Publication Type||Journal Article|
|Year of Publication||1982|
|Authors||Kemp, PR, Gardetto, PE|
Diurnal patterns of CO2 exchange and titratable acidity were monitored in sex species of evergreen rosette plants growing in controlled environment chambers and under outdoor environmental conditions. These patterns indicated that two of the species, <i>Yucca baccata</i> and <i>Y. torreyi</i>, were constitutive CAM plants while the other species, <i>Y. elata</i>, <i>Y. campestris, Nolina microcarpa</i>, and <i>Dasylirion wheeleri</i>, were C3 plants. C3 species did not exhibit CAM when grown in any of several different temperature, photoperiod, and moisture regimes. Both photosynthetic pathway types appear adapted to desert environments and all species show environmentally induced changes in their photosynthetic responses consistent with desert adaptation. The results of this study do not indicate that changes in the photosynthetic pathway type are an adaptation in any of these species.