2007
DOI: 10.1051/forest:2007021
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Effects of resource availability on condensed tannins and nitrogen in two Quercus species differing in leaf life span

Abstract: -Seedlings of Quercus ilex and Q. cerrioides, an evergreen and a winter-deciduous oak co-occurring in western-Mediterranean forests, were grown at two light regimes (8 and 36% of photosynthetically active radiation), at two water regimes (500 and 800 mm) and with two nutrient availabilities (standard substrate and 7% increase in soil N). The concentrations of soluble condensed tannins (CT) and nitrogen in the leaves were analyzed to test the phenotypic plasticity of these commonly related parameters in two con… Show more

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Cited by 9 publications
(3 citation statements)
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“…In fact, the decrease in nitrogen in the summer in forest 2 may be related to the increase in epicatechin gallate. These results are consistent with the negative correlation of leaf condensed tannins (proanthocyanidins) with nitrogen levels in Q. ilex (Estiarte et al 2007). …”
Section: Discussionsupporting
confidence: 79%
“…In fact, the decrease in nitrogen in the summer in forest 2 may be related to the increase in epicatechin gallate. These results are consistent with the negative correlation of leaf condensed tannins (proanthocyanidins) with nitrogen levels in Q. ilex (Estiarte et al 2007). …”
Section: Discussionsupporting
confidence: 79%
“…The leaves of Q. petraea as those of Q. robur are neither shortlived, nor nutrient rich or poorly defended, as proposed by the host physiological phenotype hypothesis (Cronin et al 2010). On the contrary, Q. petraea leaves have exceptionally high contents of tannin and non-tannin phenolics (Estiarte et al 2007;Eichenberg et al, unpublished manuscript). Alternatively, the load of host-specific pathogens might be less dependent on the host's traits but on the host species' range sizes and local abundance, as demonstrated by Schuldt et al (2012) for host-specific herbivory.…”
Section: Discussionmentioning
confidence: 85%
“…Quercus simulata -type and Q. pollardiana -type oaks were the two most common and abundantly preserved fagaceous species, even when other species were also available. Both species are evergreen, a leaf trait that, in oaks, often correlates with higher levels of chemical protection than deciduous leaves (Estiatre, 2007), and therefore lower levels of generalized insect herbivory (Pascual-Alvarado et al, 2008; Pearse, 2011). Evergreen leaves are nevertheless correlated with higher incidence of cynipid galls (Karban, 2007) as they are available to ovipositing insects when deciduous trees are bare and because gall-dwelling larvae are able to feed off of toxin-free leaf tissue within the gall (Kinsey, 1930; Cornell, 1983).…”
Section: Discussionmentioning
confidence: 99%