
	International Journal of Botany
	Year: 2008 \| Volume: 4 \| Issue: 3 \| Page No.: 309-314 DOI: 10.3923/ijb.2008.309.314

Photosynthetic Response to the Low Temperature in Elephant Grass (Pennisetum purpureum) and Zea mays

Abdulkhaliq A. AL-Shoaibi

Abstract: Photosynthetic CO₂ uptake and the quantum efficiency of PSII photochemistry (F_v/F_m) of C₄ grasses (Pennisetum purpureum and Zea mays) were studied at 14 and 25 °C. P. purpureum showed superior photosynthetic rates at chilling temperature (14 °C) than Z. mays. Growth at a chilling temperature compared to 25 °C had no significant effect on the light saturated assimilation rate (A_sat), the quantum yield (φ), the CO₂ saturated rate of CO₂ uptake (A_max) and the carboxylation efficiency of P. purpureum but caused more than 78% loss of those occurred in Z. mays. The values of F_v/F_m were significantly reduced only in Z. mays at 14 °C compared to 25 °C and as a result, the photosynthetic apparatus of P. purpureum was more resistant to chilling temperature than of Z. mays.

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How to cite this article:

Abdulkhaliq A. AL-Shoaibi , 2008. Photosynthetic Response to the Low Temperature in Elephant Grass (Pennisetum purpureum) and Zea mays. International Journal of Botany, 4: 309-314.

DOI: 10.3923/ijb.2008.309.314

URL: https://scialert.net/abstract/?doi=ijb.2008.309.314

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