Acta Physiologiae Plantarum

, Volume 28, Issue 5, pp 433–443

Differences in the physiological state between triticale and maize plants during drought stress and followed rehydration expressed by the leaf gas exchange and spectrofluorimetric methods

  • Tomasz Hura
  • Stanisław Grzesiak
  • Katarzyna Hura
  • Maciej Grzesiak
  • Andrzej Rzepka
Article

DOI: 10.1007/BF02706626

Cite this article as:
Hura, T., Grzesiak, S., Hura, K. et al. Acta Physiol Plant (2006) 28: 433. doi:10.1007/BF02706626

Abstract

The studies were carried out in order to estimate differences in the physiological state between triticale and maize plants subjected to drought stress followed by rehydration. The physiological state of the plants was evaluated by measurements of leaf water potential, net photosynthesis, transpiration and stomatal conductance. Spectrofluorimetric methods for the study of blue, green and red fluorescence were applied.

We observed that the soil drought induced a greater water loss in triticale leaves than in maize and consequently caused greater injuries to the photosynthetic apparatus. Moreover, triticale plant recovery was slower than in maize plants during the rehydration phase. The effect was probably connected with the higher functional and structural disorganisation of the photosynthetic apparatus observed during drought stress in triticale. Water stress is responsible for damages to photosystem PS II. The worst light utilisation in photosynthetic light conversion was recorded as an increase in the intensity of red fluorescence. Drought stress induced a strong increase in the intensity of blue and green fluorescence in the studied species and it was still high in maize plants during the first day of rehydration. Increase in the intensity of blue and green fluorescence in maize seems to be the effect of the photoprotection mechanism which prevents damage to PS II through utilisation of excess energy.

Key words

blue and green fluorescence drought maize photosynthesis red fluorescence triticale water potential 

List of abbreviations

E

transpiration rate

gs

stomatal conductance

LHC

light harvesting complex

PN

net photosynthesis

PPFD

photosynthetic photon flux density

PS II

photosystem II

PS I

photosystem I

ΩW

leaf water potential

Copyright information

© Department of Plant Physiology 2006

Authors and Affiliations

  • Tomasz Hura
    • 1
  • Stanisław Grzesiak
    • 1
  • Katarzyna Hura
    • 2
  • Maciej Grzesiak
    • 1
  • Andrzej Rzepka
    • 3
  1. 1.The Franciszek Górski Institute of Plant PhysiologyPolish Academy of SciencesKrakówPoland
  2. 2.Department of Plant Physiology, Faculty of Agriculture and EconomicsAgricultural University of CracowKrakówPoland
  3. 3.Department of Plant PhysiologyPedagogical AcademyKrakówPoland

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