Physiological and growth responses of three Mediterranean oak species to different water availability regimes

Siam, Abubakr M.J.; Radoglou, K.; Noïtsakis, B.; Smiris, P.

doi:10.1016/j.jaridenv.2007.11.001

Cited by 21 publications

(16 citation statements)

References 33 publications

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“…2). The combined effects of summer temperature, irradiance and drought on plants likely led to poor overnight recovery (Shirke and Pathre, 2003;Poulos et al, 2007;Puerta-Pinero et al, 2007;Siam et al, 2008). Decrease of afternoon C of non-watered seedlings of studied species largely depends on decrease of air humidity.…”

Section: Discussionmentioning

confidence: 99%

“…Also, the surprisingly greater gas exchange rates shown by stressed Q. ithaburensis and Q. pubescens seedlings relative to controls during spring and early summer suggest that those two species might be adapted to sporadic precipitation. That adaptation might trigger to maximize physiological and morphological activities such as photosynthate production and shift them to roots (Siam et al, 2008). Some provenances and species of palms, acacias, Metrosideros polimorpha and Azadirachta indica have acquired ecotypic adaptation to rainfall associated with their respective origins (Zobel and Liu, 1980;Abulfatih, 1995;Cordel et al, 1998;Kundu and Tigerstedt, 1999).…”

Section: Discussionmentioning

confidence: 99%

“…These species thrive either in environments that differ in water availability or coexist in similar habitats, and are used for reforestation of degraded soils. However, there are few comparative studies conducted on Mediterranean oaks with respect to water relations and their responses to drought in their southern limit (Fotelli et al, 2000;Siam et al, 2008). Such studies may contribute to the exploitation of promising species for the national and regional programs of afforestation and reforestation in areas prone to seasonal water deficit.…”

Section: Introductionmentioning

confidence: 99%

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Differences in ecophysiological responses to summer drought between seedlings of three deciduous oak species

Siam

Radoglou

Noïtsakis

et al. 2009

Forest Ecology and Management

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Differences in ecophysiological responses to summer drought between seedlings of three deciduous oak species

Siam

Radoglou

Noïtsakis

et al. 2009

Forest Ecology and Management

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“…5a and b). Indeed, there is evidence that high vapour pressure deficit plays a strong role in controlling stomatal conductance and photosynthetic efficiency in conditions of soil water limitation (Aires et al, 2008;Siam et al, 2008).…”

Section: Secondary Factorsmentioning

confidence: 99%

How do variations in the temporal distribution of rainfall events affect ecosystem fluxes in seasonally water-limited Northern Hemisphere shrublands and forests?

et al. 2012

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Abstract. Rainfall regimes became more extreme over the course of the 20th century, characterised by fewer and larger rainfall events. Such changes are expected to continue throughout the current century. The effect of changes in the temporal distribution of rainfall on ecosystem carbon fluxes is poorly understood, with most available information coming from experimental studies of grassland ecosystems. Here, continuous measurements of ecosystem carbon fluxes and precipitation from the worldwide FLUXNET network of eddy-covariance sites are exploited to investigate the effects of differences in rainfall distribution on the carbon balance of seasonally water-limited shrubland and forest sites. Once the strong dependence of ecosystem fluxes on total annual rainfall amount is accounted for, results show that sites with rainfall distributions characterised by fewer and larger rainfall events have significantly lower gross primary productivity, slightly lower ecosystem respiration and consequently a smaller net ecosystem productivity.

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“…Although the excess excited energy was significantly increased and potential activity in PSII of two species was significantly decreased from dawn to mid‐day at water‐saving irrigation, F v /F m can maintain optimum values at dawn and F v /F o can be effectively recovered during night time. These results indicate that the declined photosynthetic performance of both species at water‐saving irrigation is a photo‐protection mechanism, rather than photo‐inhibition or photosystem damage (Siam et al ).…”

Section: Discussionmentioning

confidence: 96%

Photosynthetic performance of two poplar species in shelterbelt under water‐saving irrigation in arid northwest China

Zhu

Chen

et al. 2014

Nordic Journal of Botany

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Understanding the physiology of plants in arid regions under changed water availability is critical to projecting the future of arid ecosystems. A water-saving irrigation has been implemented in an ecological shelter forest of an agricultural reclamation area located in the arid desert region in northwestern Dzungaria Basin in Xinjiang, China. In order to understand the eff ects of changed irrigation on trees, two poplar species ( Populus euphratica and P. russkii ) growing in the shelterbelt were selected, and their photosynthetic performance was contrasted by measuring their photosynthetic gas exchange and photochemical parameters under water-saving irrigation and traditional extensive fl ood irrigation. Results showed that reduced water availability during water-saving irrigation had a moderate but not signifi cant impact on the photosynthesis of the two poplar species. Populus russkii was more sensitive to changed irrigation than P. euphratica , and the latter showed a relatively higher water-defi cit resistance and a better photosynthetic performance under water-saving irrigation. Populus russkii exhibited higher capability of non-photochemical quenching by thermal dissipation of excess excitation energy at both irrigation modes making it capable of maintaining excess energy better than P. euphratica . Th ermal dissipation on excess energy and increased photo-respiration rate at water-saving irrigation together provided photo protection in P. euphratica . Both species can maintain normal function of the photosystem at water-saving irrigation. Th e declined photosynthetic performance of the two species at water-saving irrigation could be attributed to photo protection but not to photo inhibition. All this together suggested that the water-saving irrigation implemented by a manager on the shelterbelt could be feasible.

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Physiological and growth responses of three Mediterranean oak species to different water availability regimes

Cited by 21 publications

References 33 publications

Differences in ecophysiological responses to summer drought between seedlings of three deciduous oak species

Differences in ecophysiological responses to summer drought between seedlings of three deciduous oak species

How do variations in the temporal distribution of rainfall events affect ecosystem fluxes in seasonally water-limited Northern Hemisphere shrublands and forests?

Photosynthetic performance of two poplar species in shelterbelt under water‐saving irrigation in arid northwest China

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