Photosynthetic and Growth Responses of Arundo donax L. Plantlets Under Different Oxygen Deficiency Stresses and Reoxygenation

    Pompeiano A [a], Huarancca Reyes T [b], Moles T M [b], Guglielminetti L [b], Scartazza A [c]
   
   

[a] Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
[b] Department of Agriculture, Food and Environment, University of Pisa, Italy
[c] Institute of Research on Terrestrial Ecosystems, National Research Council, Monterotondo Scalo (RM), Italy

   
   

Promotion of nonfood species production to marginal, degraded lands abandoned by mainstream agriculture is affected by extremes of water availability (droughts and floods), which have increased in frequency and intensity and account for severe yield reduction. Arundo donax L., known as giant reed, has been recognized as a leading candidate crop in the Mediterranean for lignocellulosic feedstock due to its high C3 photosynthetic capacity, positive energy balance and low agroecological management demand. In this study, the photosynthetic performance and growth response of A. donax to waterlogging and submergence stress following a time course as well as their respective re-oxygenation were analyzed under reproducible and controlled environment conditions. Results of growth response showed that biomass production was strongly conditioned by the availability of oxygen. The simultaneous measurements of both gas exchanges and chlorophyll fluorescence highlighted an alteration of both stomatal and non-stomatal photosynthetic behaviors during a short/ medium period of oxygen deprivation and re-oxygenation. Photosynthetic CO2 uptake was strictly related to a combination of stomatal and mesophyll diffusional constrains, depending on the severity of the treatment and exposure time. Conditions of waterlogging and hypoxia revealed a slight growth plasticity of the species in response to prolonged stress conditions, followed by a fast recovery upon reoxygenation. Moreover, the rapid restoration of physiological functions after O2 deprivation testifies to the environmental plasticity of this perennial rhizomatous grass, although prolonged O2 shortage proved detrimental to A. donax by hampering growth and photosynthetic CO2 uptake.

   
     

 

 

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Danuše Nerudová
Rector, Mendel University in Brno

11:15 - 12:15 Opening Lecture

 

 

 

Dirk Inzé

The pivotal role of Plant Biology in a rapidly changing world

12:15 - 13:15 Keynote Lecture 01

 

 

 

Philip Wigge

Plants in a warming world

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Conditional and developmental rearrangements of the plant cytoskeleton
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  Antonio Pompeiano
Photosynthetic and growth responses of Arundo donax L. plantlets under different oxygen deficiency stresses and reoxygenation
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Early response of white cabbage (Brassica oleracea var. capitata) to increased salinity: transcriptomic, hormonal and metabolic status

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Non-invasive in planta Monitoring of Chlorophyll Biosynthesis

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Upstream and downstream events in DELLA-regulated growth and development

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  Helene Robert Boisivon
Thermomorphogenesis during seed development In Arabidopsis and Brassica napus
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The role of gibberellin signaling in plant responses to abiotic stress

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Cytokinins control xylem development via NAC SECONDARY WALL THICKENING PROMOTING FACTORs

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An ancestral mechanism for the coordination of transcriptional programs

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Molecular mechanisms controlling cytokinin homeostasis in the endoplasmic reticulum
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Auxin-cytokinin metabolism, transport and signaling during lateral root development

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Roles of Cytokinin Response Factors in different environmental stress responses

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Sulfur metabolism in C4 and C3 plants, Similarities and differences

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Jutta Ludwig-Müller

Plant hormones in biotic interactions

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Petra Jiroutová
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  Markéta Luklová
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Cytokinin modulates biotic interaction between Acremonium alternatum and Arabidopsis thaliana
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Seeding, the bottleneck of plant science
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  Archna Tiwari 
Carbon control of shade avoidance responses in Arabidopsis
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  Naghani Shekoufeh Ebrahimi 
Study of the involvement of light components pathway (PIF4 and PhyB) in high temperature response in inflorescence of Arabidopsis thaliana

 

  • Plant abiotic stress
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  • Plant signalling
  • Phytohormones
  • Plant growth and development
  • Global change and sustainable agriculture


  

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