Adaptiveness of promising lavender and lavandin cultivars under in vitro culture and ex situ

Lavandula angustifolia Mill. and lavandin ( Lavandula x intermedia Emeric ex Loisel) are promising fragrant plants with medicinal, aromatic and ornamental properties. To obtain high quality healthy planting material, in vitro cultures of valuable cultivars Belyanka, Record (lavender) and Rabat, Snezhnyi Bars (lavandin) were derived. Obtained regenerants were cultured for 4-5 months on Murashige and Skoog medium with 0.3 mg/l kinetin, 0.025 mg/l NAA и 0.25 mg/l GA3 in growth chamber at 25±1 °C under 16-h photoperiod and light intensity of 37.5 μM·m-2·s-1. Intact plants were studied during the growing season. In order to reveal plant morphogenetic capacity, biochemical stress indicators, indexes of photosynthetic activity, maximum fluorescence (Fm), stationary level of fluorescence (Fst) and water regime were determined. The proline content of lavender and lavandin plants grown ex situ was rather high (6...