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Figure 1 | BMC Plant Biology

Figure 1

From: Harpin-induced expression and transgenic overexpression of the phloem protein gene AtPP2-A1 in Arabidopsis repress phloem feeding of the green peach aphid Myzus persicae

Figure 1

PG patterns and waveforms of the green peach aphid Myzus persicae on wild-type (WT) Arabidopsis. (a) Four-hour EPG record. Plants were treated with the bacterial harpin protein HrpNEa and specific control protein preparation EVP, respectively. Five days later, uniform ten-day-old apterous aphid females were placed on upper sides of the top first expanded leaves. Feeding activities were detected immediately with a four-channel Giga-4 direct current amplifier, which enabled simultaneous recording from four individual aphids. The EPG record represents 20 aphids feeding on 20 plants treated differently and monitored in five repetitions of experiments. Reiteratively appeared EPG waveforms are indicated once at proper spaces. PP, phloem phase; Path, pathway phase; np, no probing. (b) Two important waveforms in the phloem phase dissected every five second using the EPG analysis software STYLET 2.5.

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