A rapid decrease in temperature induces latewood formation in artificially reactivated cambium of conifer stems

Regulation of cambial activity in relation to environmental conditions: understanding the role of temperature in wood formation of trees

“…Moreover, 2 months of localized heating resulted in xylem differentiation in heated poplar stems (Begum et al 2007). By contrast, 2 weeks of localized heating of stems of the deciduous conifer Larix leptolepis failed to activate the division of cambial cells (Oribe and Kubo 1997), while localized heating of stems of C. japonica induced cambial reactivation 6 days after the start of heating, with xylem differentiation starting after heating for 14 or 21 days (Begum et al 2010a(Begum et al , 2012b. Longer localized heating of the stems of deciduous trees, as compared to those of evergreen conifers, might be required for conversion of cambium from a quiescent to an active state.…”

Modelling wood formation and structure: power and limits of a morphogenetic gradient in controlling xylem cell proliferation and growth

“…However, autonomy has its limits. The onset of cambial activity is likely to be triggered by environmental factors such as temperature (Begum et al 2012), but also by tree-scale events like possibly the reestablishments of the sapflow (Turcotte et al 2009). Similarly, we could simulate how the growth speed reaches a steady value, but not the gradual decline of growth until final stop at the end of the growing season.…”

Relationships between climate, radial growth and wood properties of mature loblolly pine in Hawaii and a northern and southern site in the southeastern United States

“…Correlations between radial growth and February temperature have been reported for southern pines at their northern latitudinal range margin (Kirwin et al, 2007;Bhuta et al, 2009). Environmental conditions, in particular temperature (Begum et al, 2012), that increase photosynthesis before the resumption of growth are correlated with earlywood formation in temperate zones (Lebourgeois, 2000). The negative correlation between radial growth and June precipitation in NC trees may be related to increases in cloud cover and reduced photosynthesis and subsequently less latewood production when the transition between latewood and earlywood typically occurs (Cregg and Dougherty, 1988).…”