To elucidate the role of electrical signalling in the phloem of maize the tips of attached leaves were stimulated by chilling and wounding. Two different signals were detected in the phloem at the middle of the leaf using the aphid stylet technique: (i) action potentials (AP) arose in the phloem after chilling; and (ii) variation potentials (VP) were evoked after wounding the leaf tip... https://proozya.shop/product-category/kitchen/