Plant water relations in lychee: Effects of solar radiation interception on leaf conductance and leaf water potential |
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| Affiliation: | 1. Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Bari, Italy;2. Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic;3. Faculty of Veterinary Medicine, UVPS, Brno, Czech Republic;4. Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Ceske Budejovice, Czech Republic;5. Faculty of Veterinary Sciences, Bu-Ali Sina University, Hamedan, Iran |
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| Abstract: | The effect of radiation interception on leaf conductance and leaf water potential in six-years old lychee trees (Litchi chinensis Sonn. cv. Bengal) was investigated during the dry season in subtropical Queensland, Australia. A high degree of exposure of leaves to direct radiation raised leaf-air water vapour concentration gradient (Δw) and resulted in lower leaf conductance and leaf water potential. Interior leaves of the south side of trees were less sensitive to atmospheric and radiation effects and are the best indicator of drought stress in lychee. Completely random or stratified sampling is necessary to estimate a true mean value for calculation of canopy transpiration or photosynthesis. |
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