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Transovarial Transmission of a Plant Virus Is Mediated by Vitellogenin of Its Insect Vector

Figure 8

Model of RSV transovarial transmission.

RSV binds to Vg outside the ovary and is transported into the germ cells through VgR-mediated endocytosis. RSV first accumulates in yolk granules with Vg and is released into the cytoplasm. RSV finally enters the oocytes through the trophic core, then the nutritive cord. Gr: germarium, NC: nurse cell, Nc: nutritive cord, nc: nucleolus, TC: trophic core, O: oocyte, Y: yolk granule.

Figure 8