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@ARTICLE{Badri:56273,
author = {Badri, M. A. and Minchin, P. E. H. and Lapointe, L.},
title = {{E}ffects of temperature on the growth of spring
ephemerals: {C}rocus vernus},
journal = {Physiologia plantarum},
volume = {130},
issn = {0031-9317},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-56273},
pages = {67 - 76},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {Spring ephemerals of deciduous forests appear shortly after
snow melt and senesce shortly after the overstorey canopy
has closed. During this short period, they take advantage of
the high light conditions, but also of the low-temperature
regime that favours growth in these species. This better
growth at cooler temperatures has been attributed to longer
leaf life duration. The objective of this study was to test
if temperature effect on growth in spring ephemerals can be
explained solely by the leaf life duration, or if there is
also a direct temperature effect on the underground organ
growth. Crocus vernus (L.) Hill was exposed to two
temperature regimes, 12/8 and 18/14°C (day/night), for
sequential harvests and to four differential air to soil
temperature regimes: 12/12, 12/18, 18/12 and 18/18°C
(air/soil temperature). Dry mass, leaf nitrogen, starch
concentration and cell size of the new corm were determined.
Final dry mass and cell size were higher at the lower
temperature regime while leaf lasted longer than at the
higher temperature regime. Although both air and soil
temperatures had an impact on the different growth
parameters measured, the impact of soil temperatures was
greater and it also influenced leaf life duration. At higher
temperature, corm growth stopped before the first visual
sign of leaf senescence, suggesting that corm growth
controls leaf life duration in C. vernus rather than the
opposite and that crocus growth becomes rapidly sink limited
at higher temperatures.},
cin = {ICG-3},
ddc = {580},
cid = {I:(DE-Juel1)ICG-3-20090406},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000245645000007},
doi = {10.1111/j.1399-3054.2007.00882.x},
url = {https://juser.fz-juelich.de/record/56273},
}