Leaf morphology, photochemistry and water status changes in resprouting Quercus ilex during drought

Peña-Rojas, Karen; Aranda, Xavier; Joffre, Richard; Fleck, Isabel

doi:10.1071/fp04137

Cited by 55 publications

(33 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other leaf traits, such as M porosity (the fraction of M volume occupied by air spaces [Vol IAS ]), has been shown to have a positive correlation with g m in some species (Peña-Rojas et al, 2005), but the association may be mediated by light availability (Slaton and Smith, 2002). Leaf thickness (Thick leaf ) tends to be negatively linked to g m , and it may set an upper limit for the maximum g m , according to Terashima et al (2006), Flexas et al (2008), and Niinemets et al (2009).…”

mentioning

confidence: 99%

Coordination of Leaf Photosynthesis, Transpiration, and Structural Traits in Rice and Wild Relatives (Genus Oryza)

et al. 2013

View full text Add to dashboard Cite

The genus Oryza, which includes rice (Oryza sativa and Oryza glaberrima) and wild relatives, is a useful genus to study leaf properties in order to identify structural features that control CO 2 access to chloroplasts, photosynthesis, water use efficiency, and drought tolerance. Traits, 26 structural and 17 functional, associated with photosynthesis and transpiration were quantified on 24 accessions (representatives of 17 species and eight genomes). Hypotheses of associations within, and between, structure, photosynthesis, and transpiration were tested. Two main clusters of positively interrelated leaf traits were identified: in the first cluster were structural features, leaf thickness (Thick leaf ), mesophyll (M) cell surface area exposed to intercellular air space per unit of leaf surface area (S mes ), and M cell size; a second group included functional traits, net photosynthetic rate, transpiration rate, M conductance to CO 2 diffusion (g m ), stomatal conductance to gas diffusion (g s ), and the g m /g s ratio. While net photosynthetic rate was positively correlated with g m , neither was significantly linked with any individual structural traits. The results suggest that changes in g m depend on covariations of multiple leaf (S mes ) and M cell (including cell wall thickness) structural traits. There was an inverse relationship between Thick leaf and transpiration rate and a significant positive association between Thick leaf and leaf transpiration efficiency. Interestingly, high g m together with high g m /g s and a low S mes /g m ratio (M resistance to CO 2 diffusion per unit of cell surface area exposed to intercellular air space) appear to be ideal for supporting leaf photosynthesis while preserving water; in addition, thick M cell walls may be beneficial for plant drought tolerance.

show abstract

mentioning

confidence: 99%

Coordination of Leaf Photosynthesis, Transpiration, and Structural Traits in Rice and Wild Relatives (Genus Oryza)

et al. 2013

View full text Add to dashboard Cite

show abstract

“…( Pena-Rojas et al 2005). Accordingly, leaves with a high D survive a severe WD because of a higher resistance to physical damage by desiccation (Mediavilla et al 2001).…”

mentioning

confidence: 99%

Leaf recovery responses during rehydration after water deficit in two bean (Phaseolus vulgarisL.) cultivars

Trujillo

Rivas

Castrillo

2013

Journal of Plant Interactions

View full text Add to dashboard Cite

Our hypothesis was that recovery responses (RI and RII) upon rehydration, after 1 and 8 d of moderate (WDI) and severe water deficit (WDII), are evidence of tolerance in two commercial bean cultivars, Tacarigua (T cv) and VUL-73-40 (V cv). Recovery of leaf water (Cw) and osmotic potentials (Cs), and relative water content (LRWC), showed strong dependence on soil water potential (sCw) followed by protein content; recovery connection between stomatal conductance and soil Cw is showed. Chlorophyll (a 'b), Ribulose-1,5-bisphosphate carboxylase oxygenase (Rubisco) activity, dry biomass (DM), and leaf area (LA) recovery were sensitive to WD intensity. Specific leaf area (SLA) and leaf density (D) recovery were less dependent on WD intensity and in time-dependent manner; V cv recovery was slower, showed faster recovery of Rubisco activity and DM due to slower recovery in SLA and D, which promoted it. Rubisco activity presented correlations with LRWC and Cw at moderate and severe WD in both cultivars, and significant correlation with Cs was observed in V cv. We conclude that recovery after rehydration reveals intrinsic tolerance to WD, due to an integration of metabolic and structural interactions, in responses to leaf water status components.

show abstract

“…The induction of stomatal closure to maintain operational relative water content (RWC) (Gulías et al 2002) demonstrates the conservative use of water in this species (Tognetti et al 1998). In contrast, in R, higher nutrient and water availability (Fleck et al 1998;Peña-Rojas et al 2005), because of the high root/shoot ratio, accounts for the maintenance of high stomatal conductance and photosynthesis rates in spite of high transpiration (E) in the summer (Fig. 2c).…”

Section: Resultsmentioning

confidence: 91%

Seasonal and diurnal monitoring of leaf polyamine content in Quercus ilex L. resprouts after fire in relation to changes in irradiation and photosynthetic parameters

Pintó‐Marijuan

Agazio

Zacchini

et al. 2006

Trees

Self Cite

View full text Add to dashboard Cite

Seasonal variations in free putrescine, spermidine and spermine content, gas-exchange and chlorophyll fluorescence parameters were followed during winter and summer on leaves of a similar age from undisturbed holm oak trees (control, C) and resprouts (R) originated after fire. We observed a general trend of putrescine content decrease with increasing irradiance. Putrescine content decreased markedly from winter to summer, especially in R, which were located on a site with much higher irradiation. Daily summer variations in putrescine showed a decline at midday from morning values, and they were also more accentuated in R. Measurement of gas-exchange and chlorophyll fluorescence parameters showed marked differences between C and R under their respective light conditions. R showed higher values of PSII quantum yield ( PSII ), photochemical quenching (qP) and intrinsic efficiency of open PSII centres (F v /F m ) The PSII /PPFD response curve showed that under the same irradiance, PSII was enhanced in R and mainly under high light conditions. In spite of increasing irradiance from winter to summer, and especially in burned areas, the mentioned chlorophyll fluorescence parameters were maintained indicating the adaptation of the photosynthetic apparatus. Results derived from A/C i and A/PPFD response curves showed enhanced photosynthetic capacity and lower non-stomatal limitation of photosynthesis in R during summer stress. The contribution of putrescine decline in the photoadaptation of the photosynthetic apparatus of species growing in natural forest habitats is considered.

show abstract

Leaf morphology, photochemistry and water status changes in resprouting Quercus ilex during drought

Cited by 55 publications

References 37 publications

Coordination of Leaf Photosynthesis, Transpiration, and Structural Traits in Rice and Wild Relatives (Genus Oryza)

Coordination of Leaf Photosynthesis, Transpiration, and Structural Traits in Rice and Wild Relatives (Genus Oryza)

Leaf recovery responses during rehydration after water deficit in two bean (Phaseolus vulgarisL.) cultivars

Seasonal and diurnal monitoring of leaf polyamine content in Quercus ilex L. resprouts after fire in relation to changes in irradiation and photosynthetic parameters

Contact Info

Product

Resources

About