Biology for IGCSE & O level - Transport In Plants (Section 6 - No. 16)
Aphids are used in experiments to study translocation. How do aphids contribute to the understanding of phloem transport?
They block the phloem, stopping translocation.
Their stylets can be used to extract phloem sap and analyze its content.
They create wounds in the phloem, allowing for measurements of flow rate.
They consume all the sugars in the phloem, making it easy to isolate them.
Explanation
Aphids feed on phloem sap. Their stylets can be used to pierce the phloem and extract sap for analysis, providing information about the substances being transported.
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