scholarly journals Ontogenetic changes in stomatal and biochemical limitations to photosynthesis of two co-occurring Mediterranean oaks differing in leaf life span

2008 ◽  
Vol 28 (3) ◽  
pp. 367-374 ◽  
Author(s):  
F. J. Juarez-Lopez ◽  
A. Escudero ◽  
S. Mediavilla
Keyword(s):  
Life Span ◽  
Leaf Life Span ◽  
Ontogenetic Changes ◽  
Mediterranean Oaks

Contrasting functional strategies following severe drought in two Mediterranean oaks with different leaf habit: Quercus faginea and Quercus ilex subsp. rotundifolia

2020 ◽  
Author(s):  
David Alonso-Forn ◽  
José Javier Peguero-Pina ◽  
Juan Pedro Ferrio ◽  
Maurizio Mencuccini ◽  
Óscar Mendoza-Herrer ◽  
...  
Keyword(s):  
Life Span ◽  
Quercus Ilex ◽  
Soil Water Potential ◽  
Leaf Life Span ◽  
Severe Drought ◽  
Summer Drought ◽  
Drought Period ◽  
Quercus Faginea ◽  
Leaf Habit ◽  
Mediterranean Oaks

Abstract Nowadays, evergreen sclerophyllous and winter-deciduous malacophyllous oaks with different paleogeographical origins coexist under Mediterranean-type climates, such as the mixed forests of the evergreen Quercus ilex subsp. rotundifolia Lam. and the winter-deciduous Quercus faginea Lam. Both Mediterranean oaks constitute two examples of contrasting leaf habit, so it could be expected that they would have different functional strategies to cope with summer drought. In this study, we analysed photosynthetic, photochemical and hydraulic traits of different organs for Q. faginea and Q. ilex subsp. rotundifolia under well-watered conditions and subjected to very severe drought. The coordinated response between photosynthetic and hydraulic traits explained the higher photosynthetic capacity of Q. faginea under well-watered conditions, which compensated its shorter leaf life span at the expense of higher water consumption. The progressive imposition of water stress evidenced that both types of Mediterranean oaks displayed different functional strategies to cope with water limitations. Specifically, the decrease in mesophyll conductance associated with edaphic drought seems to be the main factor explaining the differences found in the dynamics of net CO2 assimilation throughout the drought period. The sharp decline in photosynthetic traits of Q. faginea was coupled with a strong decrease in shoot hydraulic conductance in response to drought. This fact probably avoided extensive xylem embolism in the stems (i.e., ‘vulnerability segmentation’), which enabled new leaf development after drought period in Q. faginea. By contrast, leaves of Q. ilex subsp. rotundifolia showed effective photoprotective mechanisms and high resistance to drought-induced cavitation, which would be related with the longer leaf life span of the evergreen Mediterranean oaks. The co-occurrence of both types of Mediterranean oaks could be related to edaphic conditions that ensure the maintenance of soil water potential above critical values for Q. faginea, which can be severely affected by soil degradation and climate change.

scholarly journals Leaf life span and the leaf economic spectrum in the context of whole plant architecture

2014 ◽  
Vol 102 (2) ◽  
pp. 328-336 ◽  
Author(s):  
Erika J. Edwards ◽  
David S. Chatelet ◽  
Lawren Sack ◽  
Michael J. Donoghue
Keyword(s):  
Life Span ◽  
Plant Architecture ◽  
Leaf Life Span ◽  
Whole Plant ◽  
Leaf Economic Spectrum

scholarly journals Shading effects on leaf life span and functional traits in the widespread species Enterolobium contortisiliquum (Vell.) Morong

2017 ◽  
Vol 39 (1) ◽  
pp. 113 ◽  
Author(s):  
João Paulo Souza ◽  
Nayara Magry Jesus Melo ◽  
Alessandro Dias Halfed ◽  
Jéssica Naiara Reis
Keyword(s):  
Life Span ◽  
Functional Traits ◽  
Leaf Life Span ◽  
Widespread Species ◽  
Shading Effects

A Cost-Benefit Analysis of Leaves of Eight Australian Savanna Tree Species of Differing Leaf Life-Span

2000 ◽  
Vol 36 (4) ◽  
pp. 575-586 ◽  
Author(s):  
D. Eamus ◽  
B. Myers ◽  
G. Duff ◽  
R. Williams
Keyword(s):  
Life Span ◽  
Tree Species ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Leaf Life Span ◽  
Benefit Analysis

Endogenous sink-source interactions and soil nitrogen regulate leaf life-span in an evergreen shrub

2009 ◽  
Vol 183 (4) ◽  
pp. 1114-1123 ◽  
Author(s):  
C. Marty ◽  
T. Lamaze ◽  
A. Pornon
Keyword(s):  
Life Span ◽  
Soil Nitrogen ◽  
Leaf Life Span ◽  
Evergreen Shrub

scholarly journals Leaf Life‐Span in Relation to Leaf, Plant, and Stand Characteristics among Diverse Ecosystems

1992 ◽  
Vol 62 (3) ◽  
pp. 365-392 ◽  
Author(s):  
P. B. Reich ◽  
M. B. Walters ◽  
D. S. Ellsworth
Keyword(s):  
Life Span ◽  
Leaf Life Span ◽  
Stand Characteristics
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