Photosynthetica 2004, 42(1):157-160 | DOI: 10.1023/B:PHOT.0000040585.31593.38

Growth and Leaf Gas Exchange Characteristics in Dalbergia sissoo Roxb. and D. latifolia Roxb. Under Water Deficit

M. Ashraf1, M.Y. Ashraf2, Abdul Khaliq3, Eui Shik Rha4
1 Department of Botany, University of Agriculture, Faisalabad, Pakistan, e-mail
2 Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan
3 Punjab Forestry Research Institute, Faisalabad, Pakistan
4 Research Center for Industrial Development of BioFood Materials, Chonbuk National University, Jeonju, South Korea

Forty two-month-old plants of Dalbergia sissoo and D. latifolia were subjected for 56 d to water deficit induced by withholding water. Drought stress caused a significant reduction in plant height, stem diameter, net photosynthetic rate (PN), transpiration rate (E), and stomatal conductance (gs) in both species, but the reduction was greater in D. sissoo than in D. latifolia. Water use efficiency (PN/E) was adversely affected due to water stress only in D. latifolia, and intrinsic water use efficiency (PN/gs) was increased in both species. There was a slight effect of water stress on variable to maximum fluorescence (Fv/Fm) (quantum yield of photosystem 2) in both species, but the species did not differ significantly in this attribute.

Keywords: net photosynthetic rate; stomatal conductance; transpiration; water use efficiency

Published: March 1, 2004Show citation

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Ashraf, M., Ashraf, M.Y., Khaliq, A., & Shik Rha, E. (2004). Growth and Leaf Gas Exchange Characteristics in Dalbergia sissoo Roxb. and D. latifolia Roxb. Under Water Deficit. Photosynthetica, 42(1), 157-160. doi: 10.1023/B:PHOT.0000040585.31593.38.
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