THE SYNERGISM IN THE MIXTURES OF DIFFERENT FUNGICIDES WITH CYMOXANIL ON TWO KINDS OF DOWNY MILDEW Comparative Study of the Photooxidative Response in Leaf Discs from Plants with Different Photosynthetic Pathways Comparison and Analysis of Four Methods Used in Measuring the Plant Water Potential THE STUDY ON AGROBACTERIUM TUMIFACIENS-MEDIATED TRANSFORMATION FOR WHITE BIRCH(BETULA PLATYPHYLLA) FLASK CONTAINING GUS Effects of osmoticstress on chlorophyll fluorescence in leaf discs of mungbean (Phaseolus aureus)