CHLOROPHYLL FLUORESCENCE INTENSITY IN СHАENOMELES LEAVES IN CONNECTION WITH DROUGHT TOLERANCE
https://doi.org/10.31676/2073-4948-2019-59-77-85
Abstract
Parameters of chlorophyll photoactivity were studied using the fluorimeter “Florоtest” to identify сhаenomeles genotypes with high drought tolerance. The studied genotypes were characterized by a rapid loss of water during withering (28.4-63.9 % within 4 hours) and a significant restoration of leaves turgor (58.3-93.8 %) under favorable conditions. The development of water stress was accompanied by varying degrees of decrease in the photoactivity of genotypes leaves. On average, the Stats-dama variety and the breeding form of PX 3/12 were characterized by the highest drought tolerance. As a reaction to stress, they had an increase in Fm and Fv /Fo values at the beginning of wilting by 20 and 33 %, the highest Fm values. Under the conditions of a lower initial water deficit, the Stats-dama variety maintained the highest stability of the Fv /Fo index, the highest values of photoactivity (0.7 rel. units) and a viability index (3.39 rel. units) when the leaves wilt.
About the Authors
L. D. Komar-Tyomnaya
Nikitsky Botanical Garden — National Scientific Center of Russian Academy of Sciences
Russian Federation
Russian Federation
N. V. Mesyats
Nikitsky Botanical Garden — National Scientific Center of Russian Academy of Sciences
Russian Federation
Russian Federation
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Review
For citations:
Komar-Tyomnaya L.D., Mesyats N.V. CHLOROPHYLL FLUORESCENCE INTENSITY IN СHАENOMELES LEAVES IN CONNECTION WITH DROUGHT TOLERANCE. Pomiculture and small fruits culture in Russia. 2019;59:77-85. (In Russ.) https://doi.org/10.31676/2073-4948-2019-59-77-85
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