Year 2017, Volume 63, Issue 1

Year : 2017
Volume : 63
Issue : 1
   
Authors : Anatoly SMYKOV, Yuriy IVASHCHENKO, Iuliia IVASHCHENKO, Olga FEDOROVA
Title : PHOTOSYNTHETIC ACTIVITY OF PEACH LEAF IN CONNECTION WITH DROUGHT TOLERANCE
Abstract : The aim of our research was to study the leaf chlorophyll fluorescence parameters of peach and selection of cultivars with increased resistance to drought. Studies were conducted in the laboratory on intact leaf plates of 8 cultivars of foreign selection (Veteran, Zempush, Gavazuri, Tszyu-Yus-Tszyuy, Hidistavsky Belyiy, Baby Gold-7, Pintu, Favorita Morettini) in two periods - August and September. The control cultivar was Kryimsky Shedevr of Nikitska Botanical Garden selection. Photosynthetic activity was characterized by chlorophyll fluorescence parameters (Kautsky effect). It was established that, as a result of 24-hour water deficit parameter, Fm operates more stable in cultivars Hidistavsky Belyiy, Tszyu-Yus-Tszyuy and Baby Gold-7. More prone to dehydration were peach cultivars Zempush and Pintu. Suppression index have reached 21-22%. High stability parameter Fm combined with a high water-holding capacity was found in grade Tszyu-Yus-Tszyuy. The leaves of this cultivar have lost least amount of moisture by dehydration (45%). On an indicator of (Fm-F0)/Fm the highest value was recorded in cultivar Pintu. Cultivars Pintu, Gavazuri and Tszyu-Yus-Tszyuy are the best according to the indicators (Fm -Fst)/Fm and (Fm/Fst). Their photoactivity is 10-12% higher in comparison with other cultivars and control cultivar Kryimsky Shedevr. They are characterized by a high water-holding capacity and a significant degree of recovery turgidity of tissues (82-100%). Cultivars Hidistavsky Belyiy, Veteran are promising for further study. Some cultivars have a high photoactivity at various stages of photosynthesis (Zempush, Baby Gold-7), indicating a wide range of applications in order to diagnose the state of the photosynthetic apparatus in fluorimetry method of dehydration of the leaves.
For citation : Smykov A., Ivashchenko Y., Ivashchenko I., Fedorova O., (2017) Photosynthetic activity of peach leaf in connection with drought tolerance, Agriculture and Forestry, 63 (1): 77-86. DOI: 10.17707/AgricultForest.63.1.09
Keywords : Peach, cultivars, drought resistant, parameters fluorescence
   
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ISSN 0554-5579 (Printed)
ISSN 1800-9492 (Online)
DOI : 10.17707/AgricultForest

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