Leaf Longevity in Mediterranean Evergreen Sclerophylls

Diamantoglou, S.; Mitrakos, K.

doi:10.1007/978-94-009-8683-1_4

Cited by 26 publications

(18 citation statements)

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“…T M and T min are the average monthly mean maximum and minimum temperatures during the study period, and P is the average annual precipitation during the study period. and Mitrakos, 1981). The other species are evergreen, with leaf longevity exceeding 1 year.…”

Section: Plant Speciesmentioning

confidence: 98%

Seasonal and inter-annual variations of gas exchange in thirteen woody species along a climatic gradient in the Mediterranean island of Mallorca

Gulías

Cifré

Jonasson

et al. 2009

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Plant Speciesmentioning

confidence: 98%

Seasonal and inter-annual variations of gas exchange in thirteen woody species along a climatic gradient in the Mediterranean island of Mallorca

Gulías

Cifré

Jonasson

et al. 2009

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…The soil is a sandy loam, with a large amount of gravel throughout the profile, with low levels of organic matter (1.5%), C/N (7-11) and poor in N (0.15%). Annual rainfall, temperature and evaporation of the site are shown in Figure 1, showing characteristics of a typical Mediterranean climate (Mitrakos, 1981).…”

Section: Experimental Site and Soil Parametersmentioning

confidence: 99%

“…Like in other Mediterranean species, with long-lived leaves (Diamantoglou and Mitrakos, 1981) and an extended flowering period (Martins-L o u~o and Brito de Carvalho, 1991) mechanisms have evolved that optimize water, carbon and nitrogen use for reproduction. It is also a high value cash crop and a valuable resource for reforestation to prevent erosion processes in marginal lands.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variations of leaf water potential and growth in fertigated carob-trees (Ceratonia siliqua L.)

Correia

Martins-Loução

1995

Plant Soil

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Seasonal variations of leaf water potential and growth in fertigatedcarob-trees (Ceratonia siliqua L.) P.J. C o r r e i a and M . A . M a r t i n s -L o u q~o 1 AIDA, Apartado 302, 8100 LouiS, Portugal 1Departamento de Biologia Vegetal Faculdade de Ci6ncias de Lisboa, Campo Grande, Bloco C2, Piso 4, 1700 Lisboa, Portugal Received 9 August 1994. Accepted in revised form 24 November 1994 Key words: branch length, carob, Ceratonia siliqua, evaporation, fertilization, irrigation, leaf water potential, soil water content, yield AbstractVariations of predawn and midday leaf water potential and relative growth rates were studied in mature carob trees (Ceratonia siliqua L. cv "Mulata") submitted to a fertigation experiment. Three levels of irrigation were tested: 0%, 50% and 100%, based on daily standard evaporation values. For each irrigation level two nitrogen amounts were applied -21 and 63 kg N ha-1 year-l as ammonium nitrate. The experiment was run between July 91 and August 1993. Measurements of leaf water potential and absolute branch length increments were made at monthly intervals, during the entire experimental period or during seasonal growth, respectively. Leaf water potential was related to soil volumetric water content, maximum and minimum air temperature and daily evaporation. Predawn leaf water potentials were always higher than -1.1 MPa. Midday leaf water potential values presented very large seasonal variations and very low values independent of treatments. The low leaf water potentials observed for the fertigated trees during summer, suggest that this parameter may be related not only to the evaporative demand but also to growth investment. The amount of fertigation was positively correlated with vegetative growth increment and fruit production. Practical implications for irrigation schedules of leaf water potential patterns together with drought adaptation mechanisms of carob tree are discussed.

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“…However, as shown in Table 1, leaf fall in most species is concentrated in spring in the period during and after leaf expansion [10]; most species carry two or more cohorts of old leaves in the early-mid spring [8]. The situation is similar for sclerophylls in the Mediterranean Basin with leaf fall concentrated in the spring [4,[11][12][13][14][15], although on some species, leaves last only one year at some sites ( Table 2). Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…Table 2. Mean leaf longevities recorded for sclerophyll species in Greece [12], France [13] and Spain [16]; the longevities given in months in [12] and [13] have been converted to years, and all values reduced to no more than two significant figures. In contrast to what has been reported for WTRF in Japan and MSF in the Mediterranean Basin, we have found for many of the evergreen trees and shrubs in SMSF that in early spring (April), there is only one cohort of old leaves present, while or before the new leaves expand, and there is no sign of ageing leaves about to fall.…”

Section: Introductionmentioning

confidence: 99%

Why Do Some Evergreen Species Keep Their Leaves for a Second Winter, While Others Lose Them?

Grubb

Thompson

Harper

2014

Forests

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Abstract:In subtropical montane semi-moist forest in SW China (SMSF), a large majority of evergreen tree and tall shrub species was found to have only one cohort of old leaves in early spring. In contrast, almost all species of evergreen tree and tall shrub in warm temperate rain forest (WTRF) in Japan and sclerophylls in Mediterranean-climate forest (MSF) of the Mediterranean Basin have two or more cohorts of old leaves in early spring; they drop their oldest cohort during or soon after leaf outgrowth in spring. Japanese WTRF has no dry season and MSF a dry summer. SMSF has a dry winter. On four evergreen Rhododendron species from SW China with only one cohort of old leaves in spring when in cultivation in Scotland, the majority of leaves in the senescing cohort fell by the end of December. We hypothesize that with dry winters, there is an advantage to dropping older leaves in autumn, because there is a low chance of appreciable positive assimilation in winter and a high chance of desiccation, reducing the resorption of dry mass and mineral nutrients from ageing leaves. Our hypothesis may be extended to cover evergreens at high altitude or high latitude that experience cold soils in winter.

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Leaf Longevity in Mediterranean Evergreen Sclerophylls

Cited by 26 publications

References 0 publications

Seasonal and inter-annual variations of gas exchange in thirteen woody species along a climatic gradient in the Mediterranean island of Mallorca

Seasonal and inter-annual variations of gas exchange in thirteen woody species along a climatic gradient in the Mediterranean island of Mallorca

Seasonal variations of leaf water potential and growth in fertigated carob-trees (Ceratonia siliqua L.)

Why Do Some Evergreen Species Keep Their Leaves for a Second Winter, While Others Lose Them?

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