Abstract
To study physio-biochemical responses of maize cultivars (Zea mays L.) during drought stress
conditions, a pot experiment was performed at Botanical Garden, Department of Botany, Agriculture University
Faisalabad. Experiment was conducted with 7 maize cultivars i.e., Sadaf, Pak Afgoi, EV-1098, EV-5098, sahiwal2002, Agaiti-85, Agaiti-2002, and two drought stress (60% field capacity and control) treatments with 4
replications. The results showed that water stress significantly affected the photosynthetic rate (A) of all maize
cultivars. Different maize cultivars showed differential response to water stress. In cvs. Sahiwal-2002, EV-5098
and Agaiti-2002 photosynthetic rate increased while in all other cultivars it decreased significantly. Drought stress
also reduced Transpiration Rate (E), Sub – stomatal carbon dioxide (CO2) concentration (Ci), Ci/Ca ratio, Fm
(maximal chlorophyll fluorescence), (fluorescence) Fv, Fv/Fo ratio and Fv/Fm ratio of all maize cultivars. However,
A/E (water use efficiency) and Fo (chlorophyll fluorescence) values and Fo/Fm ratio were significantly increased
with the imposition of water stress
IJAZ AHMAD, MUMTAZ HUSSAIN, TANVEER HUSSAIN, MISHAL IFTIKHAR, ABDUL GHANI, IFTIKHAR AHMAD, MUHAMMAD IKRAM, SADAF HONEY GHOURI, MUJAHID HUSSAIN. (2016) Establishment of Relationships among changes in Fluorescence, Gaseous Exchange and Growth Attributes under Drought Stress in Maize Cultivars (Zea mays L.), Biologia – Journal of Biological Society of Pakistan, Volume 62 (I), Issue 1.
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