Phenotypic plasticity of European beech (Fagus sylvatica L.) stomatal features under water deficit assessed in provenance trial
2015
Autori:
Stojnic, SrdanOrlovic, Sasa
Trudic, Branislav
Živković, Uroš
von Wuehlisch, Georg
Miljković, Danijela
Tip dokumenta:
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt:
The results of research into leaf stomatal variability of five European
beech provenances originating from Austria, Bosnia and Hercegovina,
Germany, Romania and Serbia are presented in this paper. Aim of the
study was to investigate how stomatal traits of provenances originating
from different environments change in response to drought stress and to
assess the phenotypic plasticity of the stomatal features investigated.
The study was conducted during two different years, characterized by
contrasting weather conditions (2010 and 2011). Two-way ANOVA revealed
that provenances differ significantly in terms of stomatal density (SD),
width of stomatal aperture (W-b), potential conductance index (PCI) and
relative stomatal pore surface (RSPS), during both seasons. In a dry
year (2011) all provenances significantly increased stomatal density by
between 16.1\% (Hasbruch - DE) and 21.9\% (Cer - SRB). Guard cell length
(LA) was not statistically different among provenances in either year
(2010 and 2011), even though LA decreased in the dry year (2011) in all
provenances. Reaction norms were steep in most of the parameters
suggesting the possibility of a plastic response of provenances toward
changes in soil water regime, influenced by the prevailing weather each
year. Phenotypic plasticity indices were the highest in regards of SD,
PCI and RSPS, indicating that these traits would be good candidates for
improvement in breeding programs aimed at selection of drought
resistant.