Abstract
Plants adapt to abiotic stress by undergoing diverse biochemical and physiological changes that involve hormone-dependent signalling pathways. The effects of regulators of polyamine biosynthesis can be mimicked by exogenous chemical regulators such as herbicide safeners, which not only enhance stress tolerance but also confer hormetic benefits such as increased vigor and yield. The phytohormones, abscisic acid (ABA) and auxin (IAA) play key roles in regulating stress responses in plants. Two years pot trials at Slovak University of agriculture Nitra were carried out with analyses of contents of plant hormones in spring barley grain of variety Kompakt: indolyl-acetic acid (IAA) and abscisic acid (ABA), after exposing of tested plants to herbicide stress, as well as the possible decrease of these stress factors with application of regulators of polyamine synthesis was evaluated. At 1st year in spring barley grain after application of solo triazine herbicide treatment in dose 0,5 L.ha-1 an increase of all analyzed plant hormones was observed and contrary, at 2nd year there was the decrease of their contents. From our work there is an obvious influence of herbicide stress induced by application of certain dose of triazine herbicide at 1st year. Expect of the variant with mixture of triazine herbicide (in amount of 0,5 L.ha-1) and 29,6 g.ha-1 DAB, at this year all by us applied regulators of polyamine synthesis reduced the level of both plant hormones. Higher affect of stress caused by enhanced content of soluble macroelements in soil where the plants of barley were grown was observed next year. Soil with increased contents of macronutrients (mg.kg-1): N30.7 + P108.3 + K261.5 + Mg604.2 had reducing effect on contents of plant hormones in barley grain at variant treated with solo triazine herbicide (in dose at 0,5 L.ha-1) in comparison to control variant. The mixtures of regulators of polyamine synthesis reduced the contents of IAA only in comparison to control variant. Decline in amount of ABA in barley grain was observed only after treatment with GABA, also in comparison to variant treated with water. Other mixtures of morphoregulators in combination with herbicide had not strong influence on contents of tested plant hormones in barley grain of variety Kompakt.
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Claims 7
Claim · model-written summary
In the first year, solo triazine herbicide at 0.5 L/ha increased all analysed plant hormones (IAA and ABA) in spring barley grain.
- Taxon
- spring barley
.jpg?width=60)
Hordeum vulgaree0 - Organ / stage
- graine0
- Treatment
- solo triazine herbicide treatment in dose 0,5 L.ha-1e0
- Outcome
- analyzed plant hormonese0
- Direction
- increasee0
- Qualifier
- At 1st yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“At 1st year in spring barley grain after application of solo triazine herbicide treatment in dose 0,5 L.ha-1 an increase of all analyzed plant hormones was observed and contrary, at 2nd year there was the decrease of their contents”
Claim · model-written summary
In the second year, solo triazine herbicide at 0.5 L/ha decreased the contents of the analysed plant hormones in spring barley grain.
- Taxon
- spring barleyHordeum vulgaree0
- Organ / stage
- graine0
- Treatment
- solo triazine herbicide treatment in dose 0,5 L.ha-1e0
- Outcome
- contentse0
- Direction
- decreasee0
- Qualifier
- at 2nd yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 1st year in spring barley grain after application of solo triazine herbicide treatment in dose 0,5 L.ha-1 an increase of all analyzed plant hormones was observed and contrary, at 2nd year there was the decrease of their contents”
Claim · model-written summary
In the first year, all applied regulators of polyamine synthesis reduced the level of both plant hormones in barley, except the variant mixing triazine herbicide with DAB.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- regulators of polyamine synthesise0
- Outcome
- level of both plant hormonese0
- Direction
- reducede0
- Qualifier
- at this yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at this year all by us applied regulators of polyamine synthesis reduced the level of both plant hormones”
t0“spring barley”
Claim · model-written summary
In the second year, soil with increased macronutrient contents (N30.7 + P108.3 + K261.5 + Mg604.2 mg/kg) reduced plant hormone contents in barley grain of the solo triazine variant compared with the control variant.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- graine0
- Treatment
- Soil with increased contents of macronutrients (mg.kg-1): N30.7 + P108.3 + K261.5 + Mg604.2e0
- Outcome
- contents of plant hormonese0
- Direction
- reducinge0
- Qualifier
- variant treated with solo triazine herbicide (in dose at 0,5 L.ha-1)e0
- Comparator
- control variante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil with increased contents of macronutrients (mg.kg-1): N30.7 + P108.3 + K261.5 + Mg604.2 had reducing effect on contents of plant hormones in barley grain at variant treated with solo triazine herbicide (in dose at 0,5 L.ha-1) in comparison to control variant”
Claim · model-written summary
Mixtures of regulators of polyamine synthesis reduced the IAA content only, compared with the control variant.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- mixtures of regulators of polyamine synthesise0
- Outcome
- contents of IAAe0
- Direction
- reducede0
- Comparator
- control variante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mixtures of regulators of polyamine synthesis reduced the contents of IAA only in comparison to control variant”
t0“spring barley”
Claim · model-written summary
ABA amount in barley grain declined only after GABA treatment, compared with the water-treated variant.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- graine0
- Treatment
- treatment with GABAe0
- Outcome
- amount of ABAe0
- Direction
- Declinee0
- Comparator
- variant treated with watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decline in amount of ABA in barley grain was observed only after treatment with GABA, also in comparison to variant treated with water”
Claim · model-written summary
Other mixtures of morphoregulators combined with the herbicide had no strong influence on hormone contents in barley grain of variety Kompakt.
- Taxon
- barleyHordeum vulgaree0
- Material
- Kompakte0
- Organ / stage
- graine0
- Treatment
- mixtures of morphoregulators in combination with herbicidee0
- Outcome
- contents of tested plant hormonese0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Other mixtures of morphoregulators in combination with herbicide had not strong influence on contents of tested plant hormones in barley grain of variety Kompakt”
The same questions in other papers
herbicide · physiology: hormones · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- no effect
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.