Table 1.

Increase in stomatal size, S, in response to growth at elevated atmospheric CO₂ (short-term experiments)

Species	S at low CO2, μm2	S at high CO2, μm2	S increase, %	Ref.
Zea mays	918	1,072	16.78	18
Oryza sativa cv. Pusa Basmati-1	209	231	10.53	31
O. sativa cv. P-677	155	281	81.29	31
O. sativa cv. P-834	185	251	35.68	31
O. sativa cv. P-2503-6-693	160	222	38.75	31
Betula pubescens	618	705	14.08	32

Low CO₂ treatment: 350 ppm; high CO₂ treatment: 700 ppm.