Water Relations for Sun and Shade Leaves of Four Mediterranean Evergreen Sclerophylls

Rhizopoulou, Sophia; Meletiou-Christou, Maria-Sonia; Diamantoglou, S.

doi:10.1093/jxb/42.5.627

Cited by 92 publications

(52 citation statements)

References 28 publications

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“…Water potential (Ψ pd and Ψ min ) was higher in well-irrigated seedlings, for all light levels, suggesting a generally small effect of light on water potential, as previously reported by Rhizopoulou et al [42] in four Mediterranean evergreen sclerophylls. At the end of the second soil-drying cycle, there was a significant trend for higher Ψ pd values in well-irrigated seedlings grown under the high light environments (-0.45 MPa in HL1 and HL2 vs. -0.49 MPa in LL1 and LL2, P = 0.0129, Fig.…”

Section: Discussionsupporting

confidence: 86%

“…Acclimation to different light environments occurs at both whole-plant and leaf levels [24]; leaf acclimation being associated with morphological, anatomical and physiological changes [31]. It is suggested that plants genotipically adapted to open sunny habitats have the ability to acclimate and grow under shaded conditions [42]. In particular, seedlings growing under high irradiances are able to maintain the turgor when water is limitant by decreasing the osmotic potential, through the accumulation of osmotically active solutes or by changing the bulk leaf modulus of elasticity [1,5,9].…”

Section: Introductionmentioning

confidence: 99%

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Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought

Pardos¹,

Clavijo²,

Aranda³

et al. 2005

Ann. For. Sci.

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-The interactive effects of light and drought on water relations and soluble sugars were addressed on Quercus suber L. seedlings grown under the combination of four irradiances and two soil water contents. Leaf water potentials at predawn and midday were lower for water stressed seedlings, independently of light environment. Osmotic potentials at full (Ψπ 100 ) and zero turgor (Ψπ 0 ) decreased with drought, under the four light treatments. However, the decline was greater with the development of water stress under the two treatments of higher light availability. The higher soluble sugar concentrations in seedlings grown under higher irradiances provoked a decrease of Ψπ 0. The decrease in Ψπ 100 and Ψπ 0 in moderate stressed seedlings was accompanied by an increase in ε max . The lower ability for osmotic adjustment in seedlings grown under moderate water stress and low light environment suggested a lower efficiency in developing physiological mechanisms for drought tolerance in shade-grown seedlings.cork oak / drought / light / osmotic adjustment / soluble sugars Résumé -Relations hydriques des semis de chêne-liège (Quercus suber L.) en réponse à l'ombre et à une sécheresse modérée. Les effets interactifs de la lumière et de la sécheresse sur les relations hydriques et les sucres solubles ont été étudiés sur des plantules de Quercus suber L. qui ont poussé sous la combinaison de quatre éclairements différents et de deux contenus en eau du sol. Les potentiels hydriques foliaires mesurés l'un avant l'aube et l'autre à midi étaient plus bas pour les plantules subissant un stress hydrique indépendamment du niveau d'éclairement. La pression osmotique à pleine turgescence (Ψπ 100 ) et la pression osmotique à turgescence nulle (Ψπ 0 ) ont diminué avec la sécheresse sous les quatre éclairements. Cependant, les diminutions étaient plus grandes pour les plantules soumises à un stress hydrique et à un éclairement élevé. La plus grande concentration de sucres solubles des plantules ayant poussé sous un plus grand éclairement a provoqué la diminution de Ψπ 0 . La diminution de Ψπ 100 et de Ψπ 0 pour les plantules ayant poussé sous une sécheresse modérée a été accompagnée d'une augmentation de ε max . La moindre capacité pour l'ajustement osmotique des plantules ayant poussé sous un stress hydrique modéré et une faible intensité lumineuse a montré une plus faible efficacité pour le développement des mécanismes physiologiques de tolérance à la sécheresse de ces plantules ayant poussé à l'ombre.chêne-liège / sécheresse / lumière / ajustement osmotique / sucres solubles

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Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought

Pardos¹,

Clavijo²,

Aranda³

et al. 2005

Ann. For. Sci.

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“…In fact, a strong positive correlation was found between LTh and the thickness of palisade parenchyma, specifically in Summit (r = 0.965, P < 0.001), Burlat (r = 0.933, P < 0.001) and Van (r = 0.915, P < 0.001). A similar correlation between LTh and the thickness of palisade parenchyma was also shown by Rhizopoulou et al (1991) in studies with four Mediterranean evergreen sclerophylls. According to Evans (1999), the differences in mesophyll thickness among cultivars can play a role in altering the profile of light capture through the leaf.…”

Section: Discussionsupporting

confidence: 82%

Leaf structure and function of sweet cherry tree (Prunus avium L.) cultivars with open and dense canopies

Gonçalves

Correia

Silva

et al. 2008

Scientia Horticulturae

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited.In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit:

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“…In agreement with other studies (Rhizopoulou et al, 1991;Sala, 1992) Although this is a case study performed on a single tree, it is a first approach to the sources of variation affecting leaf performance in isolated trees. These results, together with those previously reported on inter-tree variability (Oliveira et al, 1992(Oliveira et al, , 1994, should be taken into account when planning field research in similar stands.…”

supporting

confidence: 89%

Are ecophysiological responses influenced by crown position in cork-oak?

Oliveira¹,

Werner²,

Correia³

1996

Ann. For. Sci.

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Water Relations for Sun and Shade Leaves of Four Mediterranean Evergreen Sclerophylls

Cited by 92 publications

References 28 publications

Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought

Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought

Leaf structure and function of sweet cherry tree (Prunus avium L.) cultivars with open and dense canopies

Are ecophysiological responses influenced by crown position in cork-oak?

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