Light micrograph of the surface of a leaf of the elder tree, Sambucus nigra. The small oval structures scattered over the surface are stomata (pores), which provide the plant with a means of gaseous exchange between the atmosphere & the internal tissues. The pores are held open during the day & are closed at night to conserve water. Surrounding each stoma are two curved lip-like guard cells which control the opening & closing of the pore. Magnification: x200 at 35mm size.
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Details
Creative#:
TOP10174112
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
N/A
Right to Privacy:
No
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