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Cited by 108Photosynthetic Processes and MechanismsSunflower and Safflower CultivationPlant Stress Responses and Tolerance

The DOI matches its Crossref record.

Acclimation to long-term water deficit in the leaves of two sunflower hybrids: photosynthesis, electron transport and carbon metabolism.

Pankovic, D·1999·Journal of Experimental Botany

Abstract

The influence of long-term water deficit on photosynthesis, electron transport and carbon metabolism of sunflower leaves has been examined. Water deficit was imposed from flower bud formation up to the stage of full flowering in the field on two sunflower hybrids with different drought tolerance. CO2 assimilation and stomatal conductance of the intact leaves, determined at atmospheric CO2 and full sunlight (1500-2000 mu mol quanta m(-2) s(-1)), decreased with water deficit, Maximum quantum efficiency of PSII (F-v/F-m) and relative quantum yield of PSII (Phi(II)) determined under similar experimental conditions, did not change significantly in severely stressed leaves. The strong inhibition of the plateau region of the light response curve, determined at high CO2 (5%) in water-deficient sunflower leaves, indicates that photosynthesis is also limited by non-stomatal factors. The decreased slope and the plateau of the CO2 response curves show that the capacity of carboxylation and RuBP regeneration decreased in severely stressed intact leaves. Rubisco specific activity decreased in severely stressed leaves, but Rubisco content increased under prolonged drought. The increase of Rubisco content was significantly higher in leaves of the drought-tolerant sunflower hybrid indicating that a higher Rubisco content could be one factor in conferring better acclimation and higher drought tolerance.

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Crossref · 10.1093/jexbot/50.330.127

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Metadata

Authors
Pankovic, D.
Corresponding author
Pankovic, D
Venue
Journal of Experimental Botany
Published
1999-01-01
Volume
50
Issue
330
Pages
127-138
ISSN
  • 0022-0957 (ISSN-L)
  • 1460-2431
OpenAlex
W4245753677
Cited by
105
References
0
Citations by year
2024: 4 · 2023: 1 · 2022: 2 · 2021: 4 · 2020: 6 · 2019: 3 · 2018: 1 · 2017: 5 · 2016: 1 · 2015: 1 · 2014: 3 · 2013: 5 · 2012: 1
FWCI
0.68
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Experimental Botany (publishedVersion)
  • REDUN - Repository of the EDUCONS University (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Sunflower and Safflower Cultivation
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Stress Responses and Tolerance
Keywords
sunflower, drought tolerance, drought stress, photosynthesis, electron transport, carbon metabolism, stomatal conductance, carbon assimilation, Rubisco, non-stomatal limitation, light response curve, drought acclimation, sunflower hybrids

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