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Saturday, May 11, 2019

Lahijani et al. (2018) -- Huge potato growth increases from doubling CO2 levels

"Variations in assimilation rate, 
photoassimilate translocation, 
and cellular fine structure 
of potato cultivars 
(Solanum Tuberosum L.) 
exposed to elevated CO2."

Lahijani, M.J.A., Kafi, M., 
Nezami, A., Nabati, J., 
Mehrjerdi, M.Z., 
Shahkoomahally, S.
and Erwin, J. 


Plant Physiology 
and Biochemistry 
130: 303-313.

Positive effects have been observed 
in thousands of experiments 
from atmospheric CO2 enrichment
on the growth and biomass of plants.

But which plants will provide 
the largest yield increases 
per unit of CO2 rise in the 
years and decades ahead?

Elevated CO2 stimulated plant 
photosynthesis and biomass
of potatoes. 

Leaf, stem and tuber dry matter were, 
respectively, 28.1%, 27.8% and 
a whopping 165.6% higher in the 
Agria cultivar at 800 ppm CO2 
compared to ambient CO2 levels. 

Similar findings were observed 
for the Fontane cultivar, which 
experienced CO2-induced leaf, 
stem and tuber dry matter increases 
of 31.1%, 56.8% and 95.0%, 

Which plant is the better one 
to grow in the future?

Fontane has a slight edge
in tuber dry matter 
(i.e., the edible portion of the plant), 
it produced around 
0.25 g more per plant 
under elevated 
CO2 conditions 
than Agria, 
although this difference 
was not 
statistically significant.

The future 95% and 165% 
CO2-induced tuber dry matter 
increases anticipated for Fontane 
and Agria potato cultivars 
will certainly help to improve 
the food security of many nations 
that heavily rely on such 
below-ground crops 
to feed their citizens.

Focusing on two potato 
(Solanum Tuberosum) 
(Agria and Fontane), 
Lahijani et al. (2018) 
conducted an analysis. 

Their investigation included 
growing virus-free plantlets 
of both cultivars in controlled 
environment chambers 
under ambient (400 ppm) 
or elevated (800 ppm) 
CO2 conditions for 
a period of 90 days. 

All plants received 
adequate water, 
fertilization and light 
during the study.