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Evidence Active Flow Companion Cells Process Mass Aphids

Evidence for translocation includes observable cellular adaptations under microscopy, cessation of translocation when companion cell mitochondria are poisoned (indicating an active process), flow rates far exceeding diffusion, and continuous sap exudation from aphids, suggesting pressure-driven mass flow.

La evidencia de la translocación incluye adaptaciones celulares observables al microscopio, la detención de la translocación al envenenar las mitocondrias de las células acompañantes (indicando un proceso activo), la velocidad de flujo mucho mayor que la difusión y la extrusión continua de savia por áfidos, lo que sugiere flujo masivo impulsado por presión.

Front Describe and explain 4 sources of evidence for processes involved in translocation.
Back Evidence for translocation:
  • Microscopy - adaptations of companion cells for active transport
  • Poison - if mitochondria of companion cells are poisoned, translocation stops - active process
  • Flow 10k times faster than it would be by diffusion - active process driving mass flow
  • Aphids - sap continues to exude from proboscis of aphid - evidence for pressure driven mass flow bc aphids dont have to suck

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