Identification of forms resistant to mulberry phytoplasma disease by the coefficient of resistance.
2017
A direct correlation between the quantity of phloem cells in a leaf stake and the number of the reaction in cell has been established; on its basis the resistant forms were identified by means of the coefficient of resistance - K, which is calculated by the interaction of quantity of abundant phloem in the mesopetiol of a leaf stake to the indicator of reaction of cell environment. The mulberry form is considered resistant if the coefficient of resistance K is more than 1.0. If K is less than 1.0, then the form is considered susceptible. Tab. 1, Fig. 1, Ref. 5.
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