Global Warming and Stomatal Complex Types
by Abdulrahaman A. A., Oladele F. A. (2008)
in Ethnobotanical Leaflets 12: 553-556. 2008.
In relation with this, plants that possessed stomata with many subsidiary cells (e.g. tetracytic and anomocytic types) will play an important role in reducing greenhouse gases especially carbondioxide. To proof this fact, Obiremi and Oladele (2001) and Oyeleke et al (2004) studied the relationship between the stomatal complex types and transpiration rate in some selected Citrus species and some afforestation tree species respectively.
In both studies, stomatal complex types with many subsidiary cells transpired higher than those with less number. This translates to mean that the latter opens faster to allow carbon dioxide to enter the leaves and water vapour to escape to the atmosphere via the stomatal openings than the former. More over the other aspect of stomatal opening that favour water loss to the atmosphere (i.e. encouraging high rate of transpiration) is also advantageous by humidifying the atmospheric air.
However, to achieve reasonable atmospheric purification, plants with hypostomatic nature of the leaves (i.e. stomata being found or located on the abaxial surface only), lower frequency of stomata with many subsidiary cells (e.g. anisocytic, tetracytic and anomocytic), higher frequency of stomata with frequency of stomata with little subsidiary cells (e.g. cyclic, paracytic and diacytic), less heterogeneous composition of stomatal complex types, less stomatal density and index (i.e. less distribution of stomata on the surface of leaves), and lastly, probably occurrence of trichome (Figures 9 – 11) may be more suitable for afforestation in dry locations. Plants with opposite conditions of the above stomatal features may be more suitable for afforestation in wet environments. These conditions had earlier identified by Oyeleke et al. (2004) and AbdulRahaman and Oladele (2003; 2004).
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