Chlorophyll a fluorescence induction parameters of flag leaves characterize genotypes and not the drought tolerance of wheat during grain filling under water deficit

Adrienn Guóth, I. Tari, Ágnes Gallé, J. Csiszár, F. Horváth, Attila Pécsváradi, László Cseuz, L. Erdei

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13 Citations (Scopus)

Abstract

Chlorophyll a fluorescence induction parameters of two drought tolerant (MV Emese and Plainsman V) and two sensitive (GK Élet and Cappelle Desprez) wheat cultivars were compared on the day 16 post anthesis (DPA) under control and water stressed conditions. It was found that under drought stress the chlorophyll a (Chl ) content declined earlier in the sensitive genotypes, but the rate of Chl loss was much higher in the tolerant cultivars and also in the controls of cv. Plainsman after 12 DPA. The trans-zeatin content, a transport form of cytokinins also significantly declined to 16 DPA in the sensitive GK Élet. Because cytokinins prevent Chl loss, it may be a cause of the decreased Chl level in this cv. under drought. Neither net CO2 assimilation rate (PN) nor other Chl a fluorescence induction parameters such as Fv/Fm or ΦPSII, qP and NPQ as a function of increasing photon flux densities (PFD) exhibited a special change which could characterize only tolerant or sensitive cultivars. Instead, these changes characterized the genotypes. In cvs MV Emese and Plainsman the flag leaf senescence could result in faster and better remobilization of the pre-stored carbon from vegetative tissues, and ultimately better yield than in GK Élet and Cappelle Desprez under drought.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalActa Biologica Szegediensis
Volume53
Issue number1
Publication statusPublished - 2009

Fingerprint

Drought
Droughts
filling period
drought tolerance
Triticum
Fluorescence
Genotype
fluorescence
chlorophyll
wheat
Water
genotype
leaves
Cytokinins
water
drought
flowering
cytokinins
cultivars
Zeatin

Keywords

  • Chlorophyll a fluorescence
  • Drought tolerance
  • Grain filling
  • Wheat genotypes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

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title = "Chlorophyll a fluorescence induction parameters of flag leaves characterize genotypes and not the drought tolerance of wheat during grain filling under water deficit",
abstract = "Chlorophyll a fluorescence induction parameters of two drought tolerant (MV Emese and Plainsman V) and two sensitive (GK {\'E}let and Cappelle Desprez) wheat cultivars were compared on the day 16 post anthesis (DPA) under control and water stressed conditions. It was found that under drought stress the chlorophyll a (Chl ) content declined earlier in the sensitive genotypes, but the rate of Chl loss was much higher in the tolerant cultivars and also in the controls of cv. Plainsman after 12 DPA. The trans-zeatin content, a transport form of cytokinins also significantly declined to 16 DPA in the sensitive GK {\'E}let. Because cytokinins prevent Chl loss, it may be a cause of the decreased Chl level in this cv. under drought. Neither net CO2 assimilation rate (PN) nor other Chl a fluorescence induction parameters such as Fv/Fm or ΦPSII, qP and NPQ as a function of increasing photon flux densities (PFD) exhibited a special change which could characterize only tolerant or sensitive cultivars. Instead, these changes characterized the genotypes. In cvs MV Emese and Plainsman the flag leaf senescence could result in faster and better remobilization of the pre-stored carbon from vegetative tissues, and ultimately better yield than in GK {\'E}let and Cappelle Desprez under drought.",
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T1 - Chlorophyll a fluorescence induction parameters of flag leaves characterize genotypes and not the drought tolerance of wheat during grain filling under water deficit

AU - Guóth, Adrienn

AU - Tari, I.

AU - Gallé, Ágnes

AU - Csiszár, J.

AU - Horváth, F.

AU - Pécsváradi, Attila

AU - Cseuz, László

AU - Erdei, L.

PY - 2009

Y1 - 2009

N2 - Chlorophyll a fluorescence induction parameters of two drought tolerant (MV Emese and Plainsman V) and two sensitive (GK Élet and Cappelle Desprez) wheat cultivars were compared on the day 16 post anthesis (DPA) under control and water stressed conditions. It was found that under drought stress the chlorophyll a (Chl ) content declined earlier in the sensitive genotypes, but the rate of Chl loss was much higher in the tolerant cultivars and also in the controls of cv. Plainsman after 12 DPA. The trans-zeatin content, a transport form of cytokinins also significantly declined to 16 DPA in the sensitive GK Élet. Because cytokinins prevent Chl loss, it may be a cause of the decreased Chl level in this cv. under drought. Neither net CO2 assimilation rate (PN) nor other Chl a fluorescence induction parameters such as Fv/Fm or ΦPSII, qP and NPQ as a function of increasing photon flux densities (PFD) exhibited a special change which could characterize only tolerant or sensitive cultivars. Instead, these changes characterized the genotypes. In cvs MV Emese and Plainsman the flag leaf senescence could result in faster and better remobilization of the pre-stored carbon from vegetative tissues, and ultimately better yield than in GK Élet and Cappelle Desprez under drought.

AB - Chlorophyll a fluorescence induction parameters of two drought tolerant (MV Emese and Plainsman V) and two sensitive (GK Élet and Cappelle Desprez) wheat cultivars were compared on the day 16 post anthesis (DPA) under control and water stressed conditions. It was found that under drought stress the chlorophyll a (Chl ) content declined earlier in the sensitive genotypes, but the rate of Chl loss was much higher in the tolerant cultivars and also in the controls of cv. Plainsman after 12 DPA. The trans-zeatin content, a transport form of cytokinins also significantly declined to 16 DPA in the sensitive GK Élet. Because cytokinins prevent Chl loss, it may be a cause of the decreased Chl level in this cv. under drought. Neither net CO2 assimilation rate (PN) nor other Chl a fluorescence induction parameters such as Fv/Fm or ΦPSII, qP and NPQ as a function of increasing photon flux densities (PFD) exhibited a special change which could characterize only tolerant or sensitive cultivars. Instead, these changes characterized the genotypes. In cvs MV Emese and Plainsman the flag leaf senescence could result in faster and better remobilization of the pre-stored carbon from vegetative tissues, and ultimately better yield than in GK Élet and Cappelle Desprez under drought.

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