Abstract
Despite the role of γ-aminobutyric acid (GABA) in plant tolerance to chilling stress having been widely discussed in the seedling stage, very little information is clear regarding its implication in chilling tolerance during the reproductive stage of the plant. Here, we investigated the influence of GABA (1 and 2mM) as a foliar application on tomato plants ( Solanum lycopersicum L. cv. Super Marmande) subjected to chilling stress (5°C for 6h/day) for 5 successive days during the flowering stage. The results indicated that applied GABA differentially influenced leaf pigment composition by decreasing the chlorophyll a/b ratio and increasing the anthocyanin relative to total chlorophyll. However, carotenoids were not affected in both GABA-treated and non-treated stressed plants. Root tissues significantly exhibited an increase in thermo-tolerance in GABA-treated plants. Furthermore, applied GABA substantially alleviated the chilling-induced oxidative damage by protecting cell membrane integrity and reducing malondialdehyde (MDA) and H 2 O 2 . This positive effect of GABA was associated with enhancing the activity of phenylalanine ammonia-lyase (PAL), catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX). Conversely, a downregulation of peroxidase (POX) and polyphenol oxidase (PPO) was observed under chilling stress which indicates its relevance in phenol metabolism. Interesting correlations were obtained between GABA-induced upregulation of sugar metabolism coinciding with altering secondary metabolism, activities of antioxidant enzymes, and maintaining the integrity of plastids’ ultrastructure Eventually, applied GABA especially at 2mM improved the fruit yield and could be recommended to mitigate the damage of chilling stress in tomato plants.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
GABA reduced the leaf chlorophyll a/b ratio.
- Taxon
- tomato plants
Solanum lycopersicume1 - Organ / stage
- leafe0
- Treatment
- GABAe0
- Outcome
- chlorophyll a/b ratioe0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applied GABA differentially influenced leaf pigment composition by decreasing the chlorophyll a/b ratio”
e1“on tomato plants ( Solanum lycopersicum L. cv. Super Marmande) subjected to chilling stress”
Claim · model-written summary
GABA increased anthocyanin relative to total chlorophyll.
- Taxon
- tomato plantsSolanum lycopersicume2
- Treatment
- GABAe1
- Outcome
- anthocyanin relative to total chlorophylle0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the anthocyanin relative to total chlorophyll”
e1“applied GABA differentially influenced leaf pigment composition”
e2“on tomato plants ( Solanum lycopersicum L. cv. Super Marmande) subjected to chilling stress”
Claim · model-written summary
Carotenoids were unaffected in treated and untreated stressed plants.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Treatment
- GABA-treatede0
- Outcome
- carotenoidse0
- Direction
- not affectede0
- Comparator
- non-treated stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carotenoids were not affected in both GABA-treated and non-treated stressed plants”
t0“in Tomato Plants Through”
Claim · model-written summary
GABA significantly increased root thermotolerance.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Organ / stage
- Root tissuese0
- Treatment
- GABA-treatede0
- Outcome
- thermo-tolerancee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root tissues significantly exhibited an increase in thermo-tolerance in GABA-treated plants”
t0“in Tomato Plants Through”
Claim · model-written summary
GABA protected cell membrane integrity under chilling.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Treatment
- applied GABAe0
- Outcome
- cell membrane integritye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applied GABA substantially alleviated the chilling-induced oxidative damage by protecting cell membrane integrity”
t0“in Tomato Plants Through”
Claim · model-written summary
GABA reduced MDA and H2O2 under chilling.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Treatment
- applied GABAe1
- Outcome
- malondialdehyde (MDA) and H 2 O 2e0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing malondialdehyde (MDA) and H 2 O 2”
e1“applied GABA substantially alleviated the chilling-induced oxidative damage”
t0“in Tomato Plants Through”
Claim · model-written summary
GABA enhanced PAL, CAT, SOD and APX activity.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Treatment
- GABAe1
- Outcome
- activity of phenylalanine ammonia-lyase (PAL), catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX)e0
- Direction
- enhancinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhancing the activity of phenylalanine ammonia-lyase (PAL), catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX)”
e1“This positive effect of GABA”
t0“in Tomato Plants Through”
Claim · model-written summary
POX and PPO were downregulated under chilling.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Treatment
- chilling stresse0
- Outcome
- peroxidase (POX) and polyphenol oxidase (PPO)e0
- Direction
- downregulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a downregulation of peroxidase (POX) and polyphenol oxidase (PPO) was observed under chilling stress”
t0“in Tomato Plants Through”
Claim · model-written summary
GABA-linked sugar metabolism changes correlated with secondary metabolism, antioxidant activity and plastid integrity.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Treatment
- GABA-inducede0
- Outcome
- sugar metabolisme0
- Direction
- upregulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interesting correlations were obtained between GABA-induced upregulation of sugar metabolism coinciding with altering secondary metabolism, activities of antioxidant enzymes, and maintaining the integrity of plastids’ ultrastructure”
t0“in Tomato Plants Through”
Claim · model-written summary
GABA, particularly 2mM, improved fruit yield under chilling.
- Taxon
- Tomato PlantsSolanum lycopersicumt0
- Treatment
- applied GABA especially at 2mMe0
- Outcome
- fruit yielde0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applied GABA especially at 2mM improved the fruit yield”
t0“in Tomato Plants Through”
Claim · model-written summary
Authors recommend GABA to mitigate chilling damage in tomato.
- Taxon
- tomato plantsSolanum lycopersicume0
- Treatment
- applied GABA especially at 2mMe0
- Outcome
- mitigate the damage of chilling stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applied GABA especially at 2mM improved the fruit yield and could be recommended to mitigate the damage of chilling stress in tomato plants”
The same questions in other papers
gamma-aminobutyric acid · physiology: pigments · Solanum lycopersicum (tomato)Positive and negative results
2 in the opposite direction
- positive
- positive
gamma-aminobutyric acid · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →gamma-aminobutyric acid · physiology: oxidative · Solanum lycopersicum (tomato)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →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.