Fiziol. rast. genet. 2018, vol. 50, no. 5, 419-426, doi:

The investigation Deutzia Thunb. genus stomata in relation whith their drought resistance in conditions of the northen part of the forest-steppe of Ukraine

Krugliak Yu.M.

  • M.M. Gryshko National Botanical Garden, National Academy of Sciences of Ukraine 1 Tymiryazevska St., Kyiv, 01014, Ukraine

The results of the study of the size and density of stomata of plants of such species of the Deutzia Thunb. genus from the collection of arboretum M. M. Gryshko National Botanical Garden of the NAS of Ukraine: D. w elegantissima (Lemoine) Rehd., D. gracilis Sieib. et Zucc., D. w magnifica (Lemoine) Rehd., D. w rosea (Lemoine) Rehd., D. scabra Thunb., D. scabra ‘Candidissima’, D. scabra ‘Plena’, D. schneideriana Rehd., D. longifolia ‘Sessiliflora’ are presented. Plants of the Deutziа genus are not native for Ukraine. An important index of the adaptation of alien plants to new environmental conditions is their ability to withstand arid periods of the year. One of the methods that helps to determine the potential drought tolerance of plants is studying of the size of stomata and their number per area unit of the leaf surface. Xerophitic plants have more stomata per unit area of the leaf blade and their size is smaller. The aim of the work was to determine the indices of stomata of plants of the Deutziа genus and to estimate drought tolerance of plants depending on the size of the stomata and their density. The state of stomatal apparatus was determined by making of epidermal imprints. The stomata was seen under a Primo Star light microscope with zoom of w40. To capture the actual material a Canon PowerShot A640 digital camera equipped with a microscope was used. Measurements of length and width of stomata were did on a computer using the license program Axio Vision Release 4.7. According to morphometric characteristics of the stomata the most resistant to drought are D. schneideriana and D. scabra ‘Candidissima’ because they have smaller sizes of stomata (16,78±0,29 w w 6,76±0,18 and 17,99±0,51 w 7,37±0,25 mm accordingly) and more quantity of stomata in mm2 (155,92±6,78 and 175,38±7,55 accordingly). Potentially the least resistance at arid period of the year have plants of D. w elegantissima і D. scabra. The sizes of their stomata are one of the largest and the density – one of the smallest.

Keywords: Deutzia Thunb., stomata, introduction, alien plants, drought resistance

Fiziol. rast. genet.
2018, vol. 50, no. 5, 419-426

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