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2013 | 35 | 02 |

Tytuł artykułu

Reactions of Egyptian landraces of Hordeum vulgare and Sorghum bicolor to drought stress, evaluated by the OJIP fluorescence transient analysis

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Landraces of barley and of Sorghum bicolor from Egypt were evaluated for their tolerance to drought stress (DS) using the OJIP test of the chl fluorescence fast induction curve. Water was withheld from 4-week-old, potgrown plants for 8–10 days, until the volumetric soil water content decreased from 30 to below 5 vol% and the leaves reached relative water contents of\60 %. The plants were rewatered and recovery measurements were taken 24 h later. Comparative studies of the most sensitive and the most tolerant lines of both cereals, as evaluated by their Performance Indices (PIabs), revealed a similar behavior in the sensitive lines, i.e., inhibiting effects of DS on PS II connectivity (occurrence of an L band), oxygen evolving complex (occurrence of a K band) and on the J step of the induction curves, associated with an inhibition of electron transport from QA to QB. These effects persisted or were even enhanced in the rewatered plants, which resulted in similar deviations of spider plots of the OJIP parameters in the sensitive lines of both species. In the most tolerant barley accession, drought effects on ‘‘early’’ events (i.e., L, K bands) were much smaller or negligible, and there was no pronounced effect on the J step. However, distinct increases of the I step occurred, pointing to inhibited electron flow to the intersystem electron carriers and beyond PS I. The most tolerant Sorghum line, in contrast, revealed nearly no effects of the DS and recovery treatment on the fluorescence induction curves and OJIP parameters.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

35

Numer

02

Opis fizyczny

p.345-354,fig.,ref.

Twórcy

  • Department of Ecology, Evolution and Diversity, University of Frankfurt, Max von Laue Str. 13, 60348 Frankfurt, Germany
  • Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325 Frankfurt, Germany
autor
  • Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325 Frankfurt, Germany
  • Agricultural Genetic Engineering Research Institute (AGERI), ARC, Giza, Egypt
  • Department of Ecology, Evolution and Diversity, University of Frankfurt, Max von Laue Str. 13, 60348 Frankfurt, Germany
  • Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325 Frankfurt, Germany

Bibliografia

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  • Beyel V, Bru¨ggemann W (2005) Differential inhibition of photosynthesis during pre-flowering drought stress in Sorghum bicolor (L.) Moench. genotypes with different senescence traits. Physiol Plant 124:249–259
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  • Lal A, Ku MSB, Edwards GE (1996) Analysis of inhibition of photosynthesis due to water stress in the C3 species Hordeum vulgare and Vicia faba: electron transport, CO2 fixation and carboxylation capacity. Photosynth Res 49:57–69
  • Ouakarroum A, Schansker G, Strasser RJ (2009) Drought stress effects on photosystem I content and photosystem II thermotolerance achlorophyll a fluorescence OLKJIP under drought stress andre-watering. Environ Exp Bot 60:438–446
  • Sarris AH (1985) Food security and agricultural production strategies under risk in Egypt. J Dev Econom 19:85–111
  • Schansker G, To´th S, Strasser RJ (2005) Methylviologen and dibromothymoquinone treatments of pea leaves reveal the role of photosystem I in the Chl a fluorescence rise OJIP. Biochim Biophys Acta 1706:250–261
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  • Strasser RJ, Srivastava M, Tsimilli-Michael M (2000) The fluorescence transient as a tool to characterize and screen photosynthetic samples. In: Yunus M, Pathre U, Mohanty P (eds) Probing photosynthesis: mechanisms, regulation and adaption. Taylor & Francis, London, pp 445–483
  • Strasser RJ, Tsimilli-Michael M, Srivastava A (2004) Analysis of the fluorescence transient. In: Papageorgiou GC, Govindjee (eds) Chlorophyll fluorescence: a signature of photosynthesis. Springer, Dordrecht, pp 321–362
  • Strasser RJ, Tsimili-Michael M, Qiang S, Goltsev V (2010) Simultaneous in vivo recording of prompt and delayed fluorescence
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Bibliografia

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