Abstract
The stress-protective effects of plant neurotransmitters, including gamma-aminobutyric acid (GABA) have been intensively examined in recent years. However, studies on the GABA influence on stress protective systems in bread wheat cultivars with different drought adaptation strategies are still lacking. The aim of this work was to estimate the GABA effect on the state of antioxidant and osmoprotective systems in etiolated seedlings of two wheat cultivars differing significantly in drought tolerance, namely Doskonala (non-drought-resistant) and Tobak (drought-resistant) under model drought induced by PEG 6000. Two-day-old seedlings were transferred to 15% PEG 6000 and incubated for two days in the absence or presence of GABA. Treatment with 0.1 and 0.5 mM GABA significantly reduced the growth-inhibitory effect of PEG 6000 on the roots and shoots of both cultivars, but to a greater extent on those of non-resistant Doskonala. It was shown that GABA treatment reduced drought-induced accumulation of H2O2 and MDA, stabilized SOD and GPX activity, the level of sugars, anthocyanins and flavonoids in seedlings of both cultivars. Meanwhile GABA treatment enhanced the stress-induced increase in proline content in the Doskonala cultivar, but decreased it in the Tobak, completely prevented stress induced decrease in anthocyanins and flavonoids level in the Tobak and only partially in Doskonala cultivar. Thus, the stabilization of the stress-protective systems functioning in the wheat cultivars and variety-dependent differences in response to GABA were revealed. Keywords: anthocyanins, antioxidant system, drought resistance, gamma-aminobutyric acid, oxidative stress, proline, Triticum aestivum
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Claims 9
Claim · model-written summary
GABA reduced PEG-induced root growth inhibition in both cultivars, more in Doskonala.
- Taxon
- Triticum aestivum
Triticum aestivumt0 - Material
- Doskonalae0
- Treatment
- 0.1 and 0.5 mM GABAe0
- Outcome
- growth-inhibitory effect of PEG 6000 on the rootse0
- Direction
- reducede0
- Comparator
- PEG 6000e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with 0.1 and 0.5 mM GABA significantly reduced the growth-inhibitory effect of PEG 6000 on the roots and shoots of both cultivars, but to a greater extent on those of non-resistant Doskonala.”
t0“Triticum aestivum”
Claim · model-written summary
GABA reduced PEG-induced shoot growth inhibition in both cultivars.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- 0.1 and 0.5 mM GABAe0
- Outcome
- growth-inhibitory effect of PEG 6000 on the roots and shootse0
- Direction
- reducede0
- Comparator
- PEG 6000e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with 0.1 and 0.5 mM GABA significantly reduced the growth-inhibitory effect of PEG 6000 on the roots and shoots of both cultivars, but to a greater extent on those of non-resistant Doskonala.”
t0“Triticum aestivum”
Claim · model-written summary
GABA reduced drought-induced H2O2 and MDA accumulation in both cultivars.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- GABA treatmente0
- Outcome
- drought-induced accumulation of H2O2 and MDAe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GABA treatment reduced drought-induced accumulation of H2O2 and MDA”
t0“Triticum aestivum”
Claim · model-written summary
GABA stabilized SOD and GPX activity in both cultivars.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- GABA treatmente0
- Outcome
- SOD and GPX activitye0
- Direction
- stabilizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GABA treatment reduced drought-induced accumulation of H2O2 and MDA, stabilized SOD and GPX activity”
t0“Triticum aestivum”
Claim · model-written summary
GABA stabilized sugar, anthocyanin and flavonoid levels in both cultivars.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- GABA treatmente0
- Outcome
- level of sugars, anthocyanins and flavonoidse0
- Direction
- stabilizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GABA treatment reduced drought-induced accumulation of H2O2 and MDA, stabilized SOD and GPX activity, the level of sugars, anthocyanins and flavonoids in seedlings of both cultivars.”
t0“Triticum aestivum”
Claim · model-written summary
GABA increased stress-induced proline content in Doskonala.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Material
- Doskonalae0
- Treatment
- GABA treatmente0
- Outcome
- proline contente0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GABA treatment enhanced the stress-induced increase in proline content in the Doskonala cultivar”
t0“Triticum aestivum”
Claim · model-written summary
GABA decreased stress-induced proline content in Tobak.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Material
- Tobake0
- Treatment
- GABA treatmente0
- Outcome
- proline contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Meanwhile GABA treatment enhanced the stress-induced increase in proline content in the Doskonala cultivar, but decreased it in the Tobak”
t0“Triticum aestivum”
Claim · model-written summary
GABA completely prevented stress-induced anthocyanin and flavonoid decline in Tobak.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Material
- Tobake0
- Treatment
- GABA treatmente0
- Outcome
- anthocyanins and flavonoids levele0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Meanwhile GABA treatment enhanced the stress-induced increase in proline content in the Doskonala cultivar, but decreased it in the Tobak, completely prevented stress induced decrease in anthocyanins and flavonoids level in the Tobak”
t0“Triticum aestivum”
Claim · model-written summary
GABA only partly prevented anthocyanin and flavonoid decline in Doskonala.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Material
- Doskonalae0
- Treatment
- GABA treatmente0
- Outcome
- anthocyanins and flavonoids levele0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Meanwhile GABA treatment enhanced the stress-induced increase in proline content in the Doskonala cultivar, but decreased it in the Tobak, completely prevented stress induced decrease in anthocyanins and flavonoids level in the Tobak and only partially in Doskonala cultivar”
t0“Triticum aestivum”
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