Abstract
Measurements and analyses of chlorophyll fluorescence transients (induction) curves in vivo have been a powerful tool in monitoring nondestructively the photosynthetic apparatus injury caused by environmental stresses. Recently the intracellular potential and the 685-nm chlorophyll a fluorescence of intact leaves have been found to change quickly in response to high concentration CO2gas exposure: the quick response properties may be used for CO2 gas sensing. In this work, we demonstrate the quick response measurements in vivo of intact leaf to chemical stresses on the basis of Ar laser-induced chlorophyll fluorescence induction, where a fluorescence intensity emitted at 685nm is measured continuously with time. The chlorophyll a fluorescence induction curve and the surface potential of intact leaves of scheffiera octophylla have been found to change quickly in response to 100% CO2 gas and acetic acid vapor exposure. The difference in chlorlophyll fluorescence induction response between chmical stresses is discussed in detail.
