Guard cells on adaxial and abaxial epidermes of <Emphasis Type="Italic">Erythrina corallodendron</Emphasis> sepals |
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Authors: | B Huang Y Wang S Huang S Ma |
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Institution: | 1.College of Life Science and Technology,Jinan University,Guangzhou,P.R. China;2.College of Medicine,Jinan University,Guangzhou,P.R. China |
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Abstract: | This study investigated guard cells on the adaxial and the abaxial epidermes during Erythrina corallodendron sepal development. On the adaxial epidermis, the morphology of guard cells was highly variable and changes in aperture induced
by abscisic acid (ABA) were observed in 9.1 % stomata, while on the abaxial epidermis 86.7 % stomata responded to ABA. On
the adaxial epidermis, stomata did not close even when guard cell pressure potential was reduced to zero by plasmolysis, even
if fluorescein diacetate revealed that guard cells were alive. It was concluded that guard cells on the adaxial and the abaxial
epidermes of sepals sensed environmental conditions differently, maybe due to different guard cell wall elasticity. |
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