title: Intraspecific variation in the magnitude and pattern of flooding-induced shoot elongation in Rumex palustris.
abstract: OBJECTIVE
  Intraspecific variation in flooding tolerance is the basic pre-condition for adaptive flooding tolerance to evolve, and flooding-induced shoot elongation is an important trait that enables plants to survive shallow, prolonged flooding. Here an investigation was conducted to determine to what extent variation in flooding-induced leaf elongation exists among and within populations of the wetland species Rumex palustris, and whether the magnitude of elongation can be linked to habitat characteristics.
  
  
  METHODS
  Offspring of eight genotypes collected in each of 12 populations from different sites (ranging from river mudflats with dynamic flooding regimes to areas with stagnant water) were submerged, and petioles, laminas and roots were harvested separately to measure traits related to elongation and plant growth.
  
  
  RESULTS
  We found strong elongation of petioles upon submergence, and both among- and within-population variation in this trait, not only in final length, but also in the timing of the elongation response. However, the variation in elongation responses could not be linked to habitat type.
  
  
  CONCLUSIONS
  Spatio-temporal variation in the duration and depth of flooding in combination with a presumably weak selection against flooding-induced elongation may have contributed to the maintenance of large genetic variation in flooding-related traits among and within populations.
authors.affiliation: Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands. Xin.Chen@science.ru.nl
authors.forename: Xin
authors.initials: X
authors.lastname: Chen
authors.forename: Heidrun
authors.initials: H
authors.lastname: Huber
authors.forename: Hans
authors.initials: H
authors.lastname: de Kroon
authors.forename: Anton J M
authors.initials: AJ
authors.lastname: Peeters
authors.forename: Hendrik
authors.initials: H
authors.lastname: Poorter
authors.forename: Laurentius A C J
authors.initials: LA
authors.lastname: Voesenek
authors.forename: Eric J W
authors.initials: EJ
authors.lastname: Visser
mesh_terms: D000704:Analysis of Variance; D018533:Biomass; D055868:Floods; D014644:Genetic Variation; D005838:Genotype; D005843:Geography; D018515:Plant Leaves / Q000033:anatomy & histology; D018520:Plant Shoots / Q000235:genetics / Q000254:growth & development*; D031804:Rumex / Q000033:anatomy & histology / Q000235:genetics* / Q000254:growth & development*; D013045:Species Specificity
references.citation: Evolution. 2008 Mar;62(3):654-67
references.pmid: 18081714
references.citation: Plant Physiol Biochem. 2005 Aug;43(8):777-85
references.pmid: 16198589
references.citation: Heredity (Edinb). 2008 Apr;100(4):424-30
references.pmid: 18270534
references.citation: Integr Comp Biol. 2003 Jul;43(3):459-69
references.pmid: 21680454
references.citation: J Exp Bot. 2006;57(2):283-90
references.pmid: 16291797
references.citation: Q Rev Biol. 2006 Dec;81(4):349-76
references.pmid: 17240728
references.citation: Plant Physiol. 2003 May;132(1):282-91
references.pmid: 12746533
references.citation: New Phytol. 2006;172(4):655-66
references.pmid: 17096792
references.citation: Evolution. 1998 Jun;52(3):678-691
references.pmid: 28565238
references.citation: Ann Bot. 2009 Jan;103(2):377-86
references.pmid: 18713824
references.citation: Plant Physiol. 1998 Dec;118(4):1105-10
references.pmid: 9847084
references.citation: Annu Rev Plant Biol. 2008;59:313-39
references.pmid: 18444902
references.citation: Naturwissenschaften. 2000 Jul;87(7):289-303
references.pmid: 11013876
references.citation: Ann Bot. 2003 Jan;91 Spec No:227-41
references.pmid: 12509343
references.citation: Ann Bot. 2007 Mar;99(3):375-407
references.pmid: 17218346
references.citation: J Exp Bot. 2002 Mar;53(368):391-8
references.pmid: 11847236
references.citation: Trends Ecol Evol. 1995 Dec;10(12):474-5
references.pmid: 21237109
references.citation: New Phytol. 2007;176(4):749-763
references.pmid: 17997761
references.citation: Evolution. 2000 Dec;54(6):1956-68
references.pmid: 11209773
references.citation: Nat Genet. 2001 Dec;29(4):441-6
references.pmid: 11726931
references.citation: Ann Bot. 2009 Jan;103(2):353-7
references.pmid: 18697756
references.citation: Trends Plant Sci. 2000 Dec;5(12):537-42
references.pmid: 11120476
references.citation: Evolution. 2004 Jan;58(1):59-70
references.pmid: 15058719
references.citation: Am J Bot. 2008 Jan;95(1):59-65
references.pmid: 21632315
references.citation: Plant Physiol. 1993 Nov;103(3):783-791
references.pmid: 12231979
references.citation: New Phytol. 2005 Apr;166(1):49-60
references.pmid: 15760350
references.citation: Trends Ecol Evol. 2005 Dec;20(12):685-92
references.pmid: 16701458
references.citation: Plant Physiol. 2005 Sep;139(1):497-508
references.pmid: 16126859