EVALUATION OF DROUGTH TOLERANCE OF STRAWBERRY CULTIVARS ... · EVALUATION OF DROUGTH TOLERANCE OF...
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EVALUATION OF DROUGTH TOLERANCE OF STRAWBERRY CULTIVARS UNDER PROTECTED
CONDITIONS
Krzysztof Klamkowski, Waldemar Treder, Iwona Sowik, Anna Tryngiel-Gać, Agnieszka Masny
Research Institute of Horticulture, Skierniewice
The main objective of this study was to examine theresponse of strawberry cultivars to water deficiency byevaluating productivity and selected morphological andphysiological parameters.
Treatment:
• Optimal irrigation – water potential in the growing medium
maintained at a level of (-) 10 kPa,
• Reduced irrigation (stress treatment) – below (-) 30 kPa.
Physiological evaluation:
• Leaf gas exchange (net photosynthesis).
• Photosynthetic activity (chlorophyll fluorescsence).
• Leaf greenness (relative chlorophyll content).
Plant growth assessment:
• Fresh weight of plant organs.
• Laf surface area.
• Root system development.
Evaluation of plant yield
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'Elsanta' 'Grandarosa' 'Pink Rosa' 'Honeoye'
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l. u
nits]
Actual photochemical efficiency of PSII
optimal irrigation water deficiency
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dd
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ccd
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b
Net photosynthesis
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'Elsanta' 'Grandarosa' 'Pink Rosa' 'Honeoye'
[µm
ol C
O2
m-2
s-1
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optimal irrigation water deficiency
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a a
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15%
47%
32%
47%
optimal irrigation water deficiency
Total leaf surface area
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'Elsanta' 'Grandarosa' 'Pink Rosa' 'Honeoye'
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2p
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t-1]
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Fresh weight of root system
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'Elsanta' 'Grandarosa' 'Pink Rosa' 'Honeoye'
[g p
lan
t-1]
optimal irrigation water deficiency
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Fruit yield of stressed plants(% compared to control)
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'Elsanta' 'Grandarosa' 'Pink Rosa' 'Honeoye'
[%]
Water uptake by strawberry plants
Conclusions
1. Genotypic differences in drought tolerance among
strawberry cultivars were observed.
2. Photosynthetic activity of strawberry plants grown under
water deficiency conditions was decreased. Higher
reduction in net photosynthesis was observed in
‘Honeoye’ and ‘Grandarosa’ compared to the other
cultivars.
3. Growth inhibition in response to reduced water
availability was recorded in all cultivars tested.
Conclusions3. The highest yield was obtained from ‘Elsanta’ and ‘Pink
Rosa’ plants. The highest reduction in yield was observed
in ‘Honeoye’ and ‘Grandarosa’.
4. Cultivars ‘Elsanta’ and ‘Pink Rosa’ were evaluated as more
adaptable to water shortage. ‘Honeoye’ and ‘Grandarosa’
showed lower tolerance to water stress.
5. The level of water uptake depended on the amount of
solar radiation reaching the plants and was similar for the
cultivars examined.
”The sustainable improvement of European berryproduction, quality and nutrition value in a changingenvironment: Strawberries, Currants, Blackberries andRaspberries”.
Work package: Improved cultivation techniques.Task 2.3. Reducing environmental impact.Subtask 2.3.3 Improved substrate, nutrient and water useefficiency.