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Chlorophyll Fluorescence Kinetics May Be Useful to Identify Early Drought and Irrigation Effects on Photosynthetic Apparatus in Field-Grown Wheat

Lenka Botyanszka; Marek Zivcak; Erik Chovancek; Oksana Sytar; Viliam Barek; Pavol Hauptvogel; Andrej Halabuk; Marian Brestic

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      <creatorName>Lenka Botyanszka</creatorName>
      <affiliation>Department of Plant Physiology, Slovak University of Agriculture</affiliation>
      <creatorName>Marek Zivcak</creatorName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="">0000-0001-8165-3369</nameIdentifier>
      <affiliation>Department of Plant Physiology, Slovak University of Agriculture, Nitra</affiliation>
      <creatorName>Erik Chovancek</creatorName>
      <affiliation>Department of Plant Physiology, Slovak University of Agriculture, Nitra</affiliation>
      <creatorName>Oksana Sytar</creatorName>
      <affiliation>Department of Plant Physiology, Slovak University of Agriculture, Nitra</affiliation>
      <creatorName>Viliam Barek</creatorName>
      <affiliation>Department of Water Resources and Environmental Engineering, Slovak University of Agriculture</affiliation>
      <creatorName>Pavol Hauptvogel</creatorName>
      <affiliation>National Agricultural and Food Centre, Research Institute of Plant Production</affiliation>
      <creatorName>Andrej Halabuk</creatorName>
      <affiliation>Institute of Landscape Ecology, Slovak Academy of Sciences</affiliation>
      <creatorName>Marian Brestic</creatorName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="">0000-0003-3470-6100</nameIdentifier>
      <affiliation>Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences</affiliation>
    <title>Chlorophyll Fluorescence Kinetics May Be Useful to Identify Early Drought and Irrigation Effects on Photosynthetic Apparatus in Field-Grown Wheat</title>
    <subject>chlorophyll fluorescence</subject>
    <subject>performance index</subject>
    <subject>phenotyping; wheat</subject>
    <subject>spectral reflectance</subject>
    <date dateType="Issued">2020-08-28</date>
  <resourceType resourceTypeGeneral="JournalArticle"/>
    <alternateIdentifier alternateIdentifierType="url"></alternateIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.3390/agronomy10091275</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf"></relatedIdentifier>
    <rights rightsURI="">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
    <description descriptionType="Abstract">&lt;p&gt;To assess the reliability and sensitivity of non-invasive optical methods to detect the early effects of water deficit in the field, we analyzed the time-series of non-invasive measurements obtained in a dry season in a representative collection of wheat genotypes grown in small-plot field trials, in non-irrigated and irrigated variants. Despite a progressive water deficit and significant yield loss, the measurements indicated very minor changes in chlorophyll content or canopy cover. This corresponded well to the insignificant differences in spectral reflectance normalized difference vegetation index (NDVI) values. On the other hand, we identified the significant and rapid response of fast fluorescence kinetics data following the onset of irrigation. Analysis of parameters showed the main effects of drought were associated with changes in the amplitude of the I&amp;ndash;P phase of the OJIP transient, indicating changes at the level of photosystem I and beyond. Statistical analyses identified the integrative parameter performance index PI&lt;sub&gt;tot&lt;/sub&gt;&amp;nbsp;as the most sensitive parameter, which well-reflects the differences in responses of the genotypes to water deficit. Our results suggest that focusing on photosynthetic functions detected by the rapid chlorophyll fluorescence records can provide more accurate information on the drought stress level, compared to the structural data obtained by absorbance or reflectance measurements.&lt;/p&gt;</description>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/771367/">771367</awardNumber>
      <awardTitle>Increasing the efficiency and competitiveness of organic crop breeding</awardTitle>
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