Pine needle surface. Coloured environmental scanning electron micrograph (ESEM) of the surface of a pine needle (Pinus sp.) showing stomata (red). Stomata are pores that are the site of gaseous exchange in the plant. The opening and closing of the stomata is controlled by semicircular guard cells, which swell and become turgid to close the openings.

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Creative#:

TOP10704991

Source:

達志影像

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RM

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須由TPG 完整授權

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