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Stomatal Characteristics among Cassava Cultivars and their Relation to Gas Exchange

Published online by Cambridge University Press:  03 October 2008

Mabrouk A. El-Sharkawy ,
James H. Cock  and
Giovanna de Cadena
Mabrouk A. El-Sharkawy
Affiliation:
Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia, S. America
James H. Cock
Affiliation:
Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia, S. America
Giovanna de Cadena
Affiliation:
Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia, S. America
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Summary

Cassava (Manihot esculenta Crantz) has generally been reported to possess hypostomatal leaves. Several cultivars have now been found to possess clusters of functional stomata around the veins on the upper leaf surface and two cultivars (M Col 88 and M Col 90) have significant numbers of stomata (83–140 mm−2) dispersed over the entire upper leaf surface. Stomatal density on the lower leaf surface ranged from 322–553 mm−2 among cultivars, with a relative stomatal area of 3.4–6.1%. The CO2 uptake by the upper leaf surface (27% of total) and the transpiration loss (32% of total) corresponded closely to the ratio of relative stomatal areas on the upper and lower leaf surface of cv. M Col 88.

Type
Research Article
Information
Experimental Agriculture , Volume 20 , Issue 1 , January 1984 , pp. 67 - 76
Copyright
Copyright © Cambridge University Press 1984

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References

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