In this section
@article{Li:2017:10.1038/srep43087,
author = {Li, G and Gerhart, LM and Harrison, SP and Ward, JK and Harris, JM and Prentice, IC},
doi = {10.1038/srep43087},
journal = {SCIENTIFIC REPORTS},
title = {Changes in biomass allocation buffer low CO2 effects on tree growth during the last glaciation},
url = {http://dx.doi.org/10.1038/srep43087},
volume = {7},
year = {2017}
}
TY - JOUR
AB - Isotopic measurements on junipers growing in southern California during the last glacial, when the ambient atmospheric [CO2] (ca) was ~180 ppm, show the leaf-internal [CO2] (ci) was approaching the modern CO2 compensation point for C3 plants. Despite this, stem growth rates were similar to today. Using a coupled light-use efficiency and tree growth model, we show that it is possible to maintain a stable ci/ca ratio because both vapour pressure deficit and temperature were decreased under glacial conditions at La Brea, and these have compensating effects on the ci/ca ratio. Reduced photorespiration at lower temperatures would partly mitigate the effect of low ci on gross primary production, but maintenance of present-day radial growth also requires a ~27% reduction in the ratio of fine root mass to leaf area. Such a shift was possible due to reduced drought stress under glacial conditions at La Brea. The necessity for changes in allocation in response to changes in [CO2] is consistent with increased below-ground allocation, and the apparent homoeostasis of radial growth, as ca increases today.
AU - Li,G
AU - Gerhart,LM
AU - Harrison,SP
AU - Ward,JK
AU - Harris,JM
AU - Prentice,IC
DO - 10.1038/srep43087
PY - 2017///
SN - 2045-2322
TI - Changes in biomass allocation buffer low CO2 effects on tree growth during the last glaciation
T2 - SCIENTIFIC REPORTS
UR - http://dx.doi.org/10.1038/srep43087
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000394646900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
VL - 7
ER -
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