Stomata_Final - GLY6075 Global Climate Change Stomatal...

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Stomatal Index Melissa, Aldo, Tania, Michael GLY6075 Global Climate Change An atmospheric paleo-CO2 proxy
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Basic Premise Stomata are pores on leaf surfaces through which plants exchanges CO2, O2, water vapor, and other constituents with the atmosphere. It is generally advantageous for plants to conserve water loss while maximizing CO 2 uptake . - As CO 2 rises for a given water budget, for example, a plant can ‘afford’ to reduce its stomatal conductance without suffering a reduction in carbon assimilation rates. Two main pathways driving this response are smaller stomatal pores and a reduction in stomatal numbers.
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Stomata close to prevent excessive water loss in different Photosynthesis pathways (C3-C4 and CAM). . C3 pathway is more efficient in Cool and Moist condition. C4 plants became abundant in the late neogene and require a complex leaf morphology. Is more efficient in dry an warmer conditions. CAM plants: CO2 is stored in a form of acid .
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FACT: There is an inverse relationship between leaf stomatal indexes (stomatal density) and the partial pressure of CO2. - Plants grown in an artificial atmosphere with a high level of CO 2 have fewer stomata than normal. - Herbarium specimens reveal that the number of stomata in a
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Stomata_Final - GLY6075 Global Climate Change Stomatal...

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