Acta Agronomica Hungarica
Volume/Issue:
Volume 58: Issue 4
Combined effect of the drought duration and elevated atmospheric CO2 level on physiological and yield parameters of winter wheat
Authors:
B. Varga Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár Hungary

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,
K. Balla Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár Hungary

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,
S. Bencze Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár Hungary

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, and
O. Veisz Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár Hungary

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Pages:
323–331
Online Publication Date:
22 Jan 2011
Publication Date:
01 Dec 2010
Article Category:
Research Article
DOI:
https://doi.org/10.1556/AAgr.58.2010.4.1
Keywords:
drought stress; elevated CO2; cereals; yield parameters; protein content; photosynthetic activity
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The unfavourable effects of climate change were studied in terms of changes in the stress tolerance of cereals. The yield and physiological parameters of two winter wheat genotypes (Mv Mambó, Mv Regiment) were analysed in the phytotron after water was completely withheld for 7 or 14 days in three phenophases. The plants were raised in climate chambers, one adjusted to ambient CO2 concentration and the other to a higher level (750 μmol mol−1). The aim of the present work was to determine the correlations between the duration of water withholding and the phenological, physiological and yield parameters of winter wheat. It was hoped to identify how elevated CO2 levels affected the stress sensitivity of plants and whether they contributed to counteracting the damaging effects of drought. In both varieties, the grain mass decreased to the greatest extent when water was withheld at first node appearance (5.9–71.3%). A longer period of drought at first node appearance and grain filling only reduced the grain number and mass in the case of enhanced CO2. The yield and physiological parameters of Mv Regiment, however, deteriorated substantially as a result of water deficiency, though this variety was better able to utilise surplus CO2, giving outstanding results at elevated CO2 level.

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Cover Acta Agronomica Hungarica
Acta Agronomica Hungarica
Print ISSN:
0238-0161
Online ISSN:
1588-2527

Acta Agronomica Hungarica
Language English
Russian
German
French
Size  
Year of
Foundation		 1950
Publication
Programme		 ceased
Volumes
per Year		  
Issues
per Year		  
Founder Magyar Tudományos Akadémia   
Founder's
Address		 H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher Akadémiai Kiadó
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0238-0161 (Print)
ISSN 1588-2527 (Online)

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