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. 2022 Jan 26;12:785699. doi: 10.3389/fpls.2021.785699

FIGURE 2.

FIGURE 2

Foliar application of Cucurbitaceae COld Peeling Extracts (CCOPEs) enhances the resistance of rice and tomato against the root-knot nematodes Meloidogyne graminicola (Mg) and Meloidogyne incognita (Mi), respectively. (A) Normalized infection and growth parameters, as assessed for rice plants 14 days post inoculation with 250 Mg second-stage juveniles (J2s). (B) Normalized infection and growth parameters, as assessed for tomato plants 28 days post inoculation with 250 Mi J2s. (A,B) One day before inoculation, shoots of 14-days-old plants were treated with the buffer used for CCOPE preparation (Control) or CCOPE derived from pumpkin (Cucurbita moschata cv. Musquee de Provence; pCOPE), zucchini (C. pepo var. cylindrica; zCOPE) or melon (Cucumis melo var. cantalupensis; mCOPE). Error bars represent the standard error of the mean. Asterisks indicate statistically significant differences upon comparison of CCOPE- and mock-treated cells. Statistical differences were determined via a two-sided heteroscedastic t-test (p < 0.05).