The relevance of seed size in modulating leaf physiology and early plant performance in two tree species

Rodríguez Calcerrada, Jesús and Nanos, Nikolaos and Aranda García, Ismael (2011). The relevance of seed size in modulating leaf physiology and early plant performance in two tree species. "Trees-Structure And Function", v. 25 (n. 5); pp. 873-884. ISSN 0931-1890. https://doi.org/10.1007/s00468-011-0562-x.

Description

Title: The relevance of seed size in modulating leaf physiology and early plant performance in two tree species
Author/s:
  • Rodríguez Calcerrada, Jesús
  • Nanos, Nikolaos
  • Aranda García, Ismael
Item Type: Article
Título de Revista/Publicación: Trees-Structure And Function
Date: October 2011
Volume: 25
Subjects:
Faculty: E.T.S.I. Montes (UPM)
Department: Silvopascicultura [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

he size of seeds and the microsite of seed dispersal may affect the early establishment of seedlings through different physiological processes. Here, we examined the effects of seed size and light availability on seedling growth and survival, and whether such effects were mediated by water use efficiency. Acorns of Quercus petraea and the more drought-tolerant Quercus pyrenaica were sowed within and around a tree canopy gap in a sub-Mediterranean forest stand. We monitored seedling emergence and measured predawn leaf water potential (Ψpd), leaf nitrogen per unit area (Na), leaf mass per area, leaf carbon isotope composition (δ13C) and plant growth at the end of the first summer. Survival was measured on the next year. Path analysis revealed a consistent pattern in both species of higher δ13C as Ψpd decreased and higher δ13C as seedlings emerged later in the season, indicating an increase in 13C as the growing season is shorter and drier. There was a direct positive effect of seed size on δ13C in Q. petraea that was absent in Q. pyrenaica. Leaf δ13C had no effect on growth but the probability of surviving until the second year was higher for those seedlings of Q. pyrenaica that had lower δ13C on the first year. In conclusion, leaf δ13C is affected by seed size, seedling emergence time and the availability of light and water, however, leaf δ13C is irrelevant for first year growth, which is directly dependent on the amount of seed reserves.

More information

Item ID: 11623
DC Identifier: http://oa.upm.es/11623/
OAI Identifier: oai:oa.upm.es:11623
DOI: 10.1007/s00468-011-0562-x
Official URL: http://www.springerlink.com/content/g01247181832uw62/
Deposited by: Memoria Investigacion
Deposited on: 12 Jul 2012 11:24
Last Modified: 20 Apr 2016 19:38
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