Photosynthetica 1999, 36(4):627-630 | DOI: 10.1023/A:1007064725963

Effect of Water Stress on Photosynthesis and Growth in Two Teak Phenotypes

G. Rajendrudu1, C.V. Naidu2, K. Mallikarjuna1
1 Department of Botany, Sri Venkateswara University, Tirupati, Andhra Pradesh, India
2 Department of Biotechnology, Sri Venkateswara University, Tirupati, Andhra Pradesh, India

Two teak (Tectona grandis L.f.) phenotypes differing in their leaf length/breadth ratios were subjected to water stress by withholding water supply for three weeks. Growth rates of whole plants, developing leaves (1st and 2nd from shoot apices), and 2nd and 3rd internodes were higher in broad leaved (BL) phenotype than in narrow leaved (NL) phenotype before and after imposing water stress treatment. However, the effect of water stress on these parameters was higher in the BL phenotype than in the NL one. Diurnal course of net photosynthetic rate (P N) of 3rd or 4th leaves from shoot apices measured under well-watered conditions was higher for the NL than BL phenotype. P N, stomatal conductance (g s), and transpiration rate (E) in both phenotypes were negatively affected by water stress and their decline under water stress was significantly higher in the BL than NL plants.

Additional key words: leaf growth; net photosynthetic rate; stomatal conductance; Tectona grandis; transpiration rate

Prepublished online: January 1, 2000; Published: December 1, 1999  Show citation

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Rajendrudu, G., Naidu, C.V., & Mallikarjuna, K. (1999). Effect of Water Stress on Photosynthesis and Growth in Two Teak Phenotypes. Photosynthetica, 36(4), 627-630. doi: 10.1023/A:1007064725963
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    References

    1. Rajendrudu, G., Naidu, C.V.: Leaf gas exchange capacity in relation to leaf position on the stem in field grown teak (Tectona grandis L.f.).-Photosynthetica 34: 45-55, 1997. Go to original source...
    2. Rajendrudu, G., Naidu, C.V.: Effect of water stress on leaf growth and photosynthetic and transpiration rates of Tectona grandis.-Biol. Plant. 40: 229-234, 1998. Go to original source...

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