Ecophysiology of Seedlings of Three Deciduous Oak Species During Summer Water Deficit

Abubakr Mohamed Juma Siam, Kalliopi Radoglou, Basilios Noitsakis, Pavlos Smiris

Abstract


Seasonal responses of water relations and photochemical
efficiency of photo system II to summer water deficit of one-year old
seedlings of Quercus pubescens, Quercus ithaburensis and Quercus
frainetto were investigated under field conditions in Greece. Seedlings
were transplanted from nursery to field in February 2003. Half of the
seedlings of each species were kept well-watered, while the other half was
exposed to field condition. The measurements were conducted from May
through October. As the soil water deplete both predawn and afternoon
water potentials and maximum photochemical efficiency of photo system
II were decreased. Q. ithaburensis displayed significantly higher water
potentials and photochemical efficiency than the other species. Moreover
the Q. ithaburensis and O. pubescens recovered their water potentials and
photochemical efficiency to levels similar to control plants after moisture
improvement. Thus, Q. ithaburensis tended to show more drought
tolerance characteristics among the studied Oaks. In contrast, drought

Keywords


Ecophysiology; oak Species; water stress

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References


Blake-Jacobson, M.E. 1987. Stomatal conductance and water relations of

shrubs growing at the chaparral-desert ecotone in California and

Arizona. In: Tenhunen, J.D., Catarino, F.M., Lange, O.L. and

Oechel, W.C., (eds.), Plant Response to Stress, NATO ASI series

G: Ecological Science Vol. 15, Berlin pp. 223-245.

Chartzoulakis, K., Noitsakis, B., and Therios, I. 1993. Photosynthesis,

plant growth and dry matter distribution in Kiwifruit as influenced

by water deficits. Irrigation Science 14 : 1-5.

Filella, I., Llusia, J., Pinol, J., and Penuelas, J. 1998. Leaf gas exchange

and fluorescence of Phillyrea latifolia, Pistacia lentiscus and

Quercus ilex saplings in severe drought and high temperature

conditions. Environmental and Experimental Botany 39: 213-220.

Fleck, I., Hogan, K.P., Llorens, L., Abadia, A., and Aranda, X. 1998.

Photosynthesis and photoprotection in Quercus ilex resprouts after

fire. Tree Physiology 18: 607-614.

Fort, C., Fauveau, M.L., Muller, F., Label, P., Granier, A., and Dreyer,

E. 1997. Stomatal conductance, growth and root signaling in

young oak seedlings subjected to partial drying soil drying. Tree

Physiology 17: 281-289.

Fotelli, M.N., Radoglou, K.M., and Constantinidou, H.-I.A. 2000. Water

stress response of seedlings of four Mediterranean oak species.

Tree Physiology 20: 1065-1075.

Gindaba, J., Rozanov, A., and Negash, L. 2005. Photosynthetic gas

exchange, growth and biomass allocation of two Eucalyptus and

three indigenous tree species of Ethiopia under moisture deficit.

Forest Ecology and Management 205: 127-138.

Gucci, R Massai, R., Xiloyannis, C., and Flore, J.A. 1996. The effect of

drought and vapour pressure deficit on gas exchange of young

kiwifruit (Actinidia deliciosa) vines. Annals of Botany 77: 605-

Hussein, S.G. 2006. Afforestation in Arid Lands with Particular

Reference to the Sudan. 1st Edition, Khartoum University Press.

pp 151.

PCC. 2001. Climate Change. In: Impacts, Adaptation and Vulnerability.

Contribution of Working Group II to the Third Assessment Report

of the Intergovernmental Panel on Climate Change (IPCC),

McCarthy, J.J., Canziani, O.F., Leary, N.A., Dokken, D.J., and

White, K.S. (eds.). Cambridge, UK: Cambridge University Press.

Khalil, A.A.M., and Siam, A.M.J. 2003. Effect of soil drying on water

relations and growth of four provenances of Acacia Senegal

seedlings. U. of K.J.Agri.Sci. 11(1): 117-132.

Kleiner, K.W., Abrams, M.D., and Schultz, J.C. 1992. The impact of

water and nutrient deficiencies on the growth, gas exchange and

water relations of red oak and chestnut oak. Tree Physiology 11:

-287.

Lamont, B.B., Wipkowski, E.T.F., and Enright, N.J. 1993. Post-fire litter

micro sites: safe sites for seeds, unsafe for seedlings. Ecology 74:

-512.

Larsen, J.B. 1995. Ecological significance of forests and sustainable

silviculture. Forest Ecology and Management 73: 85-96.

Li, S., Pezeshki, S.R., and Goodwin, S. 2004. Effects of soil moisture

regimes on photosynthesis and growth in cattail (Typha latifolia).

Acta oecologica 25: 17-22.

Maxwell, K., and Johnson, G.N. 2000. Chlorophyll fluorescence – a

practical guide. Journal of Experimental Botany 51: 659-668.

Paoletti, E. 2005. UV-B and Mediterranean forest species: Direct effects

and ecological consequences. Environmental pollution137: 372-

Park, Y .M. 1990. Effects of drought on two grass species with different

distribution around coastal sand-dunes. Functional Ecology 4:

-741.

Pinheiro, H.A., Damatta, F.M., Chaves, A.M., Loureiro, M.E., and

Ducatti, C. 2005. Drought tolerance is associated with rooting

depth and stomatal control of water use in clones of Coffea

canephora. Annals of Botany 96: 101-108.

Radoglou, K., and Raftoyannis, Y. 2001. Effects of desiccation and

freezing on vitality and field performance of broadleaved tree

species. Annals of Forest Science 58: 59- 68.

Radoglou, K. 1996. Environmental control of CO2 assimilation rates and

stomatal conductance in five oak species growing under field

conditions in Greece. Annales des Sciences Forestieres 53: 269-

Raftoyannis, Y., and Radoglou, K. 2002. Physiological responses of

beech and sessile oak in a natural mixed stand during a dry

summer. Annals of Botany 89: 723-730.

Schutz, W., Milberg, P., and Lamont, B.B. 2002. Germination

requirements and seedling responses to water availability and soil

type in four eucalypt species. Acta Oecologica 23: 23-30.

Shirke, P,A., and Pathre, U.V. 2003. Diurnal and seasonal changes in

photosynthesis and photosystem 2 photochemical efficiency in

Prosopis juliflora leaves subjected to natural environmental stress.

Photosynthetica 41(1): 83-89.

Siam, A.M.J. 2006. Water Balance and Photochemical Efficiency in

Three Deciduous Quercus Species Under Conditions of Water

Stress. A Ph.D. Thesis, Aistotle University of Thessaloniki,

Greece.

m, A.M.J., Radoglou, K.M., Noitsakis, B., and Smiris, P. 2008.

Physiological and growth responses of three Mediterranean oak

species to different water availability regimes. Journal of Arid

Environments 72: 583-592.

saas, E.L., Ort, D.R., and Delucia, E.H. 2000. Diurnal regulation of

photosynthesis in understory saplings. New Phytologist 145: 39-

netti, R., Longobucco, A., Miglietta, F., and Raschi, A. 1999. Water

relations, stomatal response and transpiration of Quercus

pubescens trees during summer in a Mediterranean carbon

dioxide spring. Tree Physiology 19: 261-270.

te, D.A., Beadle, C.L., and Worledge, D. 1996. Leaf water relations

of Eucalyptus globules ssp and E. nitens: seasonal, drought and

species effects. Tree Physiology 16: 469-476.

dy, E., and Perevolostsky, A. 1995. Enhancement of growth and

establishment of oak seedlings (Quercus ithaburensis Decaisne) by

inoculation with Azospirillum brasilense. Forest Ecology and

Management 72: 81-83.


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