Ovary of violet. Light micrograph of a transverse section through the ovary of a violet flower, Viola sp. Developing ovules (female gametes) are visible within the hollow chamber of the ovary; they are oval in shape, each inside a protective and nutritive embryo sac. The ovules are attached in groups to placental tissue on the outer wall of the ovary; this attachment is known as parietal placentation. After fertilisation the ovules form the seeds of the violet flower. Magnification: x25 at 35mm size.
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Creative#:
TOP03201734
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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