Tolerance of spring wheat to soil drought at a heading phase
Małgorzata Grutkowska
m.grutkowska@ihar.edu.plZakład Biochemii i Fizjologii Roślin IHAR w Radzikowie (Poland)
Barbara Zagdańska
Katedra Biochemii SGGW (Poland)
Zbigniew Rybka
Zakład Biochemii i Fizjologii Roślin IHAR w Radzikowie (Poland)
Abstract
Plants of ten cultivars of spring wheat (Triticum aestivum L.) were subjected to soil drought at the heading phase until 50% of water deficit in flag leaves was attained. It has been shown that investigated cultivars differ in their ability to escape dehydration as well as to tolerate dehydration. The highest ability to escape dehydration was developed by cv. Torka, whereas the lowest one was found in cv. Broma. Soil drought enhanced flowering phase in most of the cultivars. The decreased grain weight (by about 34%) and number of grains per spike (by about 44%) resulted in reduction of grain yield (by about 71%). The strongest reduction of grain number has been observed in the florets of 4th order, whereas the lowest one was found in the flowers of the first and second orders. The experiments allowed dividing investigated cultivars into groups of resistant, medium resistant and cultivars susceptible to drought.
Keywords:
Triticum aestivum L., water deficit, grain yield, water stress, spring wheat, soil droughtReferences
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Authors
Małgorzata Grutkowskam.grutkowska@ihar.edu.pl
Zakład Biochemii i Fizjologii Roślin IHAR w Radzikowie Poland
Authors
Barbara ZagdańskaKatedra Biochemii SGGW Poland
Authors
Zbigniew RybkaZakład Biochemii i Fizjologii Roślin IHAR w Radzikowie Poland
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