Changes in assimilation capacity during leaf development in broad-leaved <i>Prunus persica</i> and sclerophyllous <i>Olea europaea</i>

Marchi, Susanna; Guidotti, D.; Sebastiani, L.; Tognetti, Roberto

doi:10.1080/14620316.2007.11512201

Cited by 19 publications

(14 citation statements)

References 30 publications

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“…Oguchi et al 2003), though thickness would result in less efficient CO 2 transfer at full leaf area expansion. Leaf development had major effects on photosynthetic potentials and limitations to gas diffusion, thus determining the carbon balance of leaves (see Marchi et al 2007). Age-dependent variations in internal leaf structure gave rise to uneven changes in intrinsic photosynthetic functions of peach versus olive.…”

Section: Discussionmentioning

confidence: 99%

Variation in mesophyll anatomy and photosynthetic capacity during leaf development in a deciduous mesophyte fruit tree (Prunus persica) and an evergreen sclerophyllous Mediterranean shrub (Olea europaea)

Marchi

Tognetti

Minnocci

et al. 2008

Trees

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112

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The relative importance that biomechanical and biochemical leaf traits have on photosynthetic capacity would depend on a complex interaction of internal architecture and physiological differences. Changes in photosynthetic capacity on a leaf area basis and anatomical properties during leaf development were studied in a deciduous tree, Prunus persica, and an evergreen shrub, Olea europaea. Photosynthetic capacity increased as leaves approached full expansion. Internal CO 2 transfer conductance (g i ) correlated with photosynthetic capacity, although, differences between species were only partially explained through structural and anatomical traits of leaves. Expanding leaves preserved a close functional balance in the allocation of resources of photosynthetic component processes. Stomata developed more rapidly in olive than in peach. Mesophyll thickness doubled from initial through final stages of development when it was twice as thick in olive as in peach. The surface area of mesophyll cells exposed to intercellular air spaces per unit leaf area tended to decrease with increasing leaf expansion, whereas, the fraction of mesophyll volume occupied by the intercellular air spaces increased strongly. In the sclerophyllous olive, structural protection of mesophyll cells had priority over efficiency of photochemical mechanisms with respect to the broad-leaved peach. The photosynthetic capacity of these woody plants during leaf development relied greatly on mesophyll properties, more than on leaf mass per area ratio (LMA) or nitrogen (N) allocation. Age-dependent changes in diffusion conductance and photosynthetic capacity affected photosynthetic relationships of peach versus olive foliage, evergreen leaves maturing functionally and structurally a bit earlier than deciduous leaves in the course of adaptation for xeromorphy.

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Section: Discussionmentioning

confidence: 99%

Variation in mesophyll anatomy and photosynthetic capacity during leaf development in a deciduous mesophyte fruit tree (Prunus persica) and an evergreen sclerophyllous Mediterranean shrub (Olea europaea)

Marchi

Tognetti

Minnocci

et al. 2008

Trees

Self Cite

112

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“…In addition to physiological and environmental variables, endogenous factors (hydraulic and chemical signals) appear to affect stomatal conductance in olive trees (Jones 1998;Moriana et al 2002). In many works, the C i /C a ratio was maintained within a narrow range throughout water treatments, reflecting tight coupling between assimilation rate and stomatal conductance (Moriana et al 2002;Centritto et al 2005;Díaz-Espejo et al 2006), and the reduction in photosynthetic activity in water-stressed olive plants was entirely caused by the diffusional limitations restricting the supply of CO 2 to metabolism in response to soil moisture (Centritto et al , 2005Tognetti et al 2007). On the other hand, as the stress progresses, photosynthetic CO 2 fixation may be limited more directly by non-stomatal factors, such as biochemical constraints (Lawlor and Cornic 2002;Ashraf et al 2008;Munns and Tester 2008).…”

Section: Introductionmentioning

confidence: 98%

“…A higher photosynthetic rate under drought is a decisive factor for better drought tolerance in olive cultivars (Bacelar et al 2007). On the other hand, photosynthetic capacity differed significantly between different degrees of leaf expansion (Marchi et al 2007). Water deficit induced a parallel decline in assimilation rate and stomatal conductance, as water status decreases (Tognetti et al 2004), showing that olive trees were able to restrict water loss by modulating stomatal closure at different levels of drought stress .…”

Section: Introductionmentioning

confidence: 99%

Physiological and anatomical changes induced by drought in two olive cultivars (cv Zalmati and Chemlali)

Boughalleb¹,

Hajlaoui

2010

Acta Physiol Plant

100

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Photosynthetic gas exchange, vegetative growth, water relations and fluorescence parameters as well as leaf anatomical characteristics were investigated on young plants of two Olea europaea L. cultivars (Chemlali and Zalmati), submitted to contrasting water availability regimes. Twoyear-old olive trees, grown in pots in greenhouse, were not watered for 2 months. Relative growth rate (RGR), leaf water potential (W LW ) and the leaf relative water content (LWC) of the two cultivars decreased with increasing water stress. Zalmati showed higher values of RGR and LWC and lower decreased values of W LW than Chemlali, in response to water deficit, particularly during severe drought stress. Water stress also caused a marked decline on photosynthetic capacity and chlorophyll fluorescence. The net photosynthetic rate, stomatal conductance, transpiration rate, the maximal photochemical efficiency of PSII (F v /F m ) and the intrinsic efficiency of open PSII reaction centres (F 0 v /F 0 m ) decreased as drought stress developed. In addition, drought conditions, reduced leaf chlorophyll and carotenoids contents especially at severe water stress. However, Zalmati plants were the less affected when compared with Chemlali. In both cultivars, stomatal control was the major factor affecting photosynthesis under moderate drought stress. At severe drought-stress levels, the non-stomatal component of photosynthesis is inhibited and inactivation of the photosystem II occurs. Leaf anatomical parameters show that drought stress resulted in an increase of the upper epidermis and palisade mesophyll thickness as well as an increase of the stomata and trichomes density. These changes were more characteristic in cv. 'Zalmati'. Zalmati leaves also revealed lower specific leaf area and had higher density of foliar tissue. From the behaviour of Zalmati plants, with a smaller reduction in relative growth rate, net assimilation rate and chlorophyll fluorescence parameters, and with a thicker palisade parenchyma, and a higher stomatal and trichome density, we consider this cultivar more droughttolerant than cv. Chemlali and therefore, very promising for cultivation in arid areas.

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“…However, few studies have revealed that woody tissues of evergreen trees could be potential carbon (Larcher & Thomaser-Thin 1988) or N pools (Roberts et al 1991). The availability of carbohydrates is strictly dependent on and connected to the growth and development of leaves and shoots, the partitioning of carbohydrates being determined by resource availability, growth capacity and maintenance requirement (Marchi et al 2007). Several studies have highlighted the function of leaves as storage of nutrients, and resources remobilized from leaves to support new growth (Aerts 1996, Cherbuy et al 2001.…”

Section: Resource Remobilization In Quercus Aquifolioides and Betula mentioning

confidence: 99%

Evergreen Quercus aquifolioides remobilizes more soluble carbon components but less N and P from leaves to shoots than deciduous Betula ermanii at the end-season

Cong¹,

Wang²,

He³

et al. 2018

iForest

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(1-7)Remobilization is an important mechanism of resource conservation in plants. However, our understanding of whether the responses of resource remobilization to global warming differ between deciduous and evergreen trees remains unclear. We assessed resource remobilization from leaves to 1-year-old shoots in a deciduous (Betula ermanii) and an evergreen (Quercus aquifolioides) species along elevational gradients (i.e., temperature gradient) at the end of growing season. We aimed to test the hypotheses that the reallocation rate increased with increasing elevation and that more resources were reallocated from leaves to storage tissues in deciduous species than in evergreen species. We analyzed the concentrations of non-structural carbohydrates (NSC), nitrogen (N) and phosphorus (P), and compared the differences in remobilization efficiency of NSC, N, and P between leaves and shoots within each species and between the two species along the elevational gradients. Due to the different strategies of evergreen and deciduous species in nutrients use, the deciduous species had higher N and P remobilization rate, but lower remobilization rate of sugars, starch, and NSC than the evergreen species at the end of growing season. The remobilization rate of NSC, N, and P was significantly higher in trees at their upper limits compared to lower elevations. Our results suggest that trees reallocate resources from leaves to storage tissues before leaf senescence or at the end of growing season, to increase the resource use efficiency and to adapt to the harsh alpine environments. These results contribute to better understanding of the alpine treeline phenomenon in a changing world.

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Changes in assimilation capacity during leaf development in broad-leaved Prunus persica and sclerophyllous Olea europaea

Cited by 19 publications

References 30 publications

Variation in mesophyll anatomy and photosynthetic capacity during leaf development in a deciduous mesophyte fruit tree (Prunus persica) and an evergreen sclerophyllous Mediterranean shrub (Olea europaea)

Variation in mesophyll anatomy and photosynthetic capacity during leaf development in a deciduous mesophyte fruit tree (Prunus persica) and an evergreen sclerophyllous Mediterranean shrub (Olea europaea)

Physiological and anatomical changes induced by drought in two olive cultivars (cv Zalmati and Chemlali)

Evergreen Quercus aquifolioides remobilizes more soluble carbon components but less N and P from leaves to shoots than deciduous Betula ermanii at the end-season

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