All Scientists are Sceptics ~Professor Bob Carter

Whenever someone asserts that a scientific question is “settled,” they tell me immediately that they don’t understand the first thing about science. Science is never settled. Dr David Deming

Perhaps the most frustrating aspect of the science of climate change is the lack of any real substance in attempts to justify the hypothesis ~Professor Stewart Franks

A lie told often enough becomes the truth.
-- Vladimir Ilyich Lenin - See more at: http://thepeoplescube.com/lenin/lenin-s-own-20-monster-quotes-t185.html#sthash.aTrSI3tG.dpuf
A lie told often enough becomes the truth.
-- Vladimir Ilyich Lenin - See more at: http://thepeoplescube.com/lenin/lenin-s-own-20-monster-quotes-t185.html#sthash.aTrSI3tG.dpuf
A lie told often enough becomes the truth.
-- Vladimir Ilyich Lenin - See more at: http://thepeoplescube.com/lenin/lenin-s-own-20-monster-quotes-t185.html#sthash.aTrSI3tG.dpuf

Wednesday, 20 November 2013

Elevated CO2 Reduces disease but increases growth in Two Eucalyptus Clones

Hybrids of Eucalyptus urophylla
The researchers dos Santos et al evaluated the effect of elevated CO2 on  two
Eucalyptus clones (a hybrid of Eucalyptus urophylla and a cross betweenE. urophylla x E. camaldulensis) The clones were cultivated under CO2 concentrations of ~394ppmv and 553 and 878ppmv. In the treatments with 553 and 878, the plants of both clones had greater growth (215 % and 219 % increases in leaf area and 22 % and 24 % in stem diameter, respectively), a longer incubation period (65 % for both CO2 concentrations) and less disease severity (48 % and 78 % reduction, respectively) on average compared with the plants cultivated at 394.

The results show that an increased CO2 concentration can reduce the severity of Ceratocystis wilt and stimulate the growth of Eucalyptus clonal plantlets. 

From CO2 Science
What it means
In the concluding sentence of their paper's abstract, dos Santos et al. say their results show that "an increased CO2 concentration can reduce the severity of Ceratocystis wilt and stimulate the growth ofEucalyptus clonal plantlets." And it does it all ... at one and the same time.

Reference
Dos Santos, M. de S., Ghini, R., Fernandes, B.V. and Silva, C.A. 2013. Increased carbon dioxide concentration in the air reduces the severity of Ceratocystis wilt in Eucalyptus clonal plantlets. Australasian Plant Pathology42: 595-599. (Link)

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