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Reaction norms of life history traits in response to zinc in Thlaspi caerulescens from metalliferous and nonmetalliferous sites
Author(s) -
Dechamps Caroline,
Lefèbvre Claude,
Noret Nausicaa,
Meerts Pierre
Publication year - 2007
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2006.01884.x
Subject(s) - hyperaccumulator , fecundity , biology , zinc , longevity , phenotypic plasticity , botany , soil water , plant physiology , life history theory , ecology , population , phytoremediation , life history , chemistry , genetics , demography , organic chemistry , sociology
Summary• We examined phenotypic plasticity of fitness components in response to zinc (Zn) in the Zn hyperaccumulator, Thlaspi caerulescens . • Two populations from Zn‐enriched soils (M) and two populations from normal soils (NM) were grown in pots at three Zn concentrations (0, 1000 and 8000 mg kg −1 Zn), for an entire life cycle. Growth, Zn accumulation and fitness components were assessed. • Based on vegetative growth, M and NM populations had similar Zn tolerance at 1000 mg kg −1 Zn. However, reproductive output was markedly decreased in NM at 1000 and 8000 mg kg −1 Zn. In M populations, Zn did not affect fitness. However, low Zn status enhanced reproductive output in year 1 compared with year 2 and decreased survival after the first flowering season. • M populations are able to achieve equal fitness across a broad range of Zn concentrations in soil by different combinations of fecundity and longevity. No cost of higher tolerance was demonstrated in M populations. Reproductive traits appeared to be a more sensitive indicator of tolerance than vegetative growth.