Bulliform cell: Difference between revisions
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'''Bulliform cells''' are large, bubble-shaped [[Epidermis (botany)|epidermal cells]] that occur in groups on the upper surface of the leaves of many [[grasses]]. Loss of [[turgor pressure]] in these cells causes leaves to "roll up" during water stress. During [[drought]], the loss of moisture through [[vacuoles]] induces bulliform cells to cause the leaves of many grass species to close as the two edges of the grass blade fold up toward each other. Once adequate water is available, these cells enlarge and the leaves open again. Folded leaves offer less exposure to sunlight, so they are heated less thus reducing evaporation and conserving the remaining water in the plant and occur on the leaves of many monocotyledons but are probably best known in grasses. They are thought to play a role in the unfolding of developing leaves and in the rolling and unrolling of mature leaves in response to alternating wet and dry periods.<ref>Moore, R. et al. (1998) ''Botany.'' 2nd Ed. WCB/McGraw Hill. ISBN 0-697-28623</ref> |
'''Bulliform cells''' are large, bubble-shaped [[Epidermis (botany)|epidermal cells]] that occur in groups on the upper surface of the leaves of many [[grasses]]. Loss of [[turgor pressure]] in these cells causes leaves to "roll up" during water stress. During [[drought]], the loss of moisture through [[vacuoles]] induces bulliform cells to cause the leaves of many grass species to close as the two edges of the grass blade fold up toward each other. Once adequate water is available, these cells enlarge and the leaves open again. Folded leaves offer less exposure to sunlight, so they are heated less thus reducing evaporation and conserving the remaining water in the plant and occur on the leaves of many monocotyledons but are probably best known in grasses. They are thought to play a role in the unfolding of developing leaves and in the rolling and unrolling of mature leaves in response to alternating wet and dry periods.<ref>Moore, R. et al. (1998) ''Botany.'' 2nd Ed. WCB/McGraw Hill. ISBN 0-697-28623-1</ref> |
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== References == |
== References == |
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Revision as of 02:18, 13 June 2014
Bulliform cells are large, bubble-shaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. Loss of turgor pressure in these cells causes leaves to "roll up" during water stress. During drought, the loss of moisture through vacuoles induces bulliform cells to cause the leaves of many grass species to close as the two edges of the grass blade fold up toward each other. Once adequate water is available, these cells enlarge and the leaves open again. Folded leaves offer less exposure to sunlight, so they are heated less thus reducing evaporation and conserving the remaining water in the plant and occur on the leaves of many monocotyledons but are probably best known in grasses. They are thought to play a role in the unfolding of developing leaves and in the rolling and unrolling of mature leaves in response to alternating wet and dry periods.[1]
References
- ^ Moore, R. et al. (1998) Botany. 2nd Ed. WCB/McGraw Hill. ISBN 0-697-28623-1
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