Figure 9.
Aphid stylet sampling of Arabidopsis sieve tube sap. A, English green aphids feeding on an Arabidopsis stem. B, HPLC analysis of an approximately 5-nL droplet of stylet exudate (inset). A distinct AsA peak can be seen by electrochemical (EC) detection in the phloem sap (red trace). Other peaks can be detected by UV210, which does not pick up AsA.