Abstract
Plants biostimulants (PBs) have been shown to play multiple roles in plant growth and to improve crop tolerance to abiotic stresses such as salinity. The present investigation was undertaken for the first time to study the effect of PBs - a plant-derived protein hydrolysate (PH), a root activator (RA) and a root stimulator (RS) - on Portulaca oleracea L. tolerance to salt stress. For this purpose, a Tunisian P. oleracea cultivar was cultivated in pots under a greenhouse. Plants were treated with a factorial combination of three nutrient solutions (non-salt control, 50 and 100 mM NaCl) and three PBs were applied to roots. Growth and physiological parameters were then determined. Main results showed that salt stress decreased shoot and root dry biomass, chlorophyll and carotenoid contents while it increased the content in total soluble sugars, proline and relative water contents. However, root application of the three PBs induced some significant differences in the agronomical and physiological responses between PB treated and untreated plants when subjected to sodium chloride salinity from 50 and 100 mM NaCl. Overall, the present study proves that the root application of these PBs increases the performance of P. oleracea plants under salinity conditions. Therefore, PBs can be used to improve the salt-stress tolerance of vegetable crops by increasing their physiological responses to abiotic stress Portulaca oleracea L.; plant; salinity; biostimulant; growth; physiology
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 6
Claim · model-written summary
Salt stress reduced shoot and root dry biomass.
- Taxon
- Portulaca oleracea L.
Portulaca oleraceae1 - Treatment
- salt stresse0
- Outcome
- shoot and root dry biomasse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress decreased shoot and root dry biomass, chlorophyll and carotenoid contents while it increased the content in total soluble sugars, proline and relative water contents.”
e1“on Portulaca oleracea L. tolerance to salt stress”
Claim · model-written summary
Salt stress reduced chlorophyll and carotenoid contents.
- Taxon
- Portulaca oleracea L.Portulaca oleraceae1
- Treatment
- salt stresse0
- Outcome
- chlorophyll and carotenoid contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress decreased shoot and root dry biomass, chlorophyll and carotenoid contents while it increased the content in total soluble sugars, proline and relative water contents.”
e1“on Portulaca oleracea L. tolerance to salt stress”
Claim · model-written summary
Salt stress increased total soluble sugars, proline and relative water contents.
- Taxon
- Portulaca oleracea L.Portulaca oleraceae1
- Treatment
- salt stresse0
- Outcome
- total soluble sugars, proline and relative water contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress decreased shoot and root dry biomass, chlorophyll and carotenoid contents while it increased the content in total soluble sugars, proline and relative water contents.”
e1“on Portulaca oleracea L. tolerance to salt stress”
Claim · model-written summary
Root applied biostimulants significantly altered agronomic and physiological responses under salinity relative to untreated plants.
- Taxon
- Portulaca oleracea L.Portulaca oleraceae1
- Treatment
- root application of the three PBse0
- Outcome
- agronomical and physiological responsese0
- Qualifier
- sodium chloride salinity from 50 and 100 mM NaCle0
- Comparator
- untreated plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root application of the three PBs induced some significant differences in the agronomical and physiological responses between PB treated and untreated plants when subjected to sodium chloride salinity from 50 and 100 mM NaCl.”
e1“on Portulaca oleracea L. tolerance to salt stress”
Claim · model-written summary
Root application of the biostimulants increased P. oleracea performance under salinity.
- Taxon
- P. oleraceaPortulaca oleraceae0
- Treatment
- root application of these PBse0
- Outcome
- performancee0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root application of these PBs increases the performance of P. oleracea plants under salinity conditions.”
Claim · model-written summary
The authors proposed using biostimulants to improve vegetable crop salt tolerance.
Verbatim
e0“PBs can be used to improve the salt-stress tolerance of vegetable crops by increasing their physiological responses to abiotic stress”
The same questions in other papers
salinity · physiology: pigments · Portulaca oleraceaResults differ
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
salinity · growth · Portulaca oleraceaResults agree
2 papers in the same direction as this paper
- negative
- negative
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.