The occurrence of Barley yellow dwarf virus-MAV (BYDV-MAV), Barley yellow dwarf virus- PAV (BYDV-PAV) and Cereal yellow dwarf virus-RPV (CYDV-RPV) in maize plants was investigated using ELISA test. The viruses were detected in plants originated from Wielkopolska, Podlasie, Lubelszczyzna and Podkarpacie regions. BYDV-PAV was demonstrated as the main causal agent of barley yellow dwarf symptoms in maize in Poland.
The effect of Maize dwarf mosaic virus (MDMV) infection and Sugarcane mosaic virus (SCMV) infection on maize plants was studied in two-year field experiment with three maize varieties. The experiment was carried out in field conditions with the protection of the plants from aphid infestation with the special net. The plants were mechanically inoculated with the viruses. The effects of MDMV and SCMV on 3 maize cultivars were evaluated using disease symptoms (plant height), total yield, yield of kernels and the weight of 1 000 kernels. The results were statistically analyzed. The most important effect of the viruses was the reduction of the yield of kernels, ranging from: 46.0 to 69.8% for MDMV-P2 and from 48.8 to 69.8%, for SCMV-P1.
The hop (Humulus lupulus L.) is one of the most infected plants by viruses. Preparation of apical meristems in combination with heat therapy was successfuly used for obtaining of virus-free hop plants in various countries in the world. In our experiments we prepared the meristems both before and after the heat therapy. Hop plants regenerated from such meristems were free not only from the thermolabile ILAR-viruses, but in the great number also from the thermostable CARLA - viruses. The method of virus elimination and micropropagation of virus-free plants in vitro, described in this paper, enables to obtain a large number of virus-free plantlets in a short time.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.