Abstract
The escalating prevalence of drought stress presents a significant obstacle to global rice cultivation, particularly in arid regions affected by climate change-induced water scarcity. Despite extensive research on the efficacy of exogenously applied chitosan in enhancing drought tolerance across various crops, there remains a gap in understanding the differential responses of chitosan-treated rice seedlings among different cultivars and different chitosan concentrations during pre-drought and drought stress conditions. This study aims to address this gap by investigating the effects of chitosan application on the stress responses of four distinct rice cultivars, namely Khao Dowk Mali 105 (KDML105), Suphanburi 1 (SB1), Riceberry (RB), and RD49 during before and drought stress conditions. The study observed significant variations in phenotypic traits, particularly shoot and root weights, among the cultivars, following chitosan treatment (10, 20, and 40 ppm) during simulated drought stress. The results indicate that the application of 10 ppm of chitosan considerably improves the growth of shoots in the KDML105 under conditions of drought stress. This improvement is associated with an increase in the levels of fructose and glucose in the leaves. Chitosan treatment in SB1 showed higher concentrations of amino acids, including proline, that facilitate the development of roots in drought conditions. Conversely, RB and RD49 demonstrated adverse effects on growth parameters, with elevated H2O2 levels indicating oxidative stress. This study highlights the diverse reactions of several rice cultivars to chitosan pretreatment when subjected to drought stress.
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Claims 9
Claim · model-written summary
Chitosan treatment produced significant variation in seedling shoot and root weights among rice cultivars during simulated drought.
- Taxon
- Rice
Oryza sativat0 - Material
- cultivarse0
- Treatment
- chitosane0
- Outcome
- shoot and root weightse0
- Direction
- significant variationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“The study observed significant variations in phenotypic traits, particularly shoot and root weights, among the cultivars, following chitosan treatment (10, 20, and 40 ppm) during simulated drought stress.”
Claim · model-written summary
At 10 ppm, chitosan improved shoot growth of KDML105 under drought.
- Taxon
- RiceOryza sativat0
- Material
- KDML105e0
- Treatment
- 10 ppm of chitosane0
- Outcome
- growth of shootse0
- Direction
- improvese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“The results indicate that the application of 10 ppm of chitosan considerably improves the growth of shoots in the KDML105 under conditions of drought stress.”
Claim · model-written summary
The KDML105 shoot improvement was associated with increased leaf fructose and glucose.
- Taxon
- RiceOryza sativat0
- Organ / stage
- leavese0
- Outcome
- levels of fructose and glucosee0
- Direction
- increasee0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“This improvement is associated with an increase in the levels of fructose and glucose in the leaves.”
Claim · model-written summary
Chitosan treatment in SB1 raised amino acid concentrations, including proline.
- Taxon
- RiceOryza sativat0
- Material
- SB1e0
- Outcome
- concentrations of amino acids, including prolinee0
- Direction
- highere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“Chitosan treatment in SB1 showed higher concentrations of amino acids, including proline, that facilitate the development of roots in drought conditions.”
Claim · model-written summary
Chitosan treated SB1 showed facilitated root development under drought.
- Taxon
- RiceOryza sativat0
- Material
- SB1e0
- Outcome
- development of rootse0
- Direction
- facilitatee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“Chitosan treatment in SB1 showed higher concentrations of amino acids, including proline, that facilitate the development of roots in drought conditions.”
Claim · model-written summary
RB had adverse growth responses under chitosan pretreatment and drought.
- Taxon
- RiceOryza sativat0
- Material
- RBe0
- Outcome
- growth parameterse0
- Direction
- adverse effectse0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“Conversely, RB and RD49 demonstrated adverse effects on growth parameters, with elevated H2O2 levels indicating oxidative stress.”
Claim · model-written summary
RD49 had adverse growth responses under chitosan pretreatment and drought.
- Taxon
- RiceOryza sativat0
- Material
- RD49e0
- Outcome
- growth parameterse0
- Direction
- adverse effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“Conversely, RB and RD49 demonstrated adverse effects on growth parameters, with elevated H2O2 levels indicating oxidative stress.”
Claim · model-written summary
RB showed elevated H2O2 levels indicating oxidative stress.
- Taxon
- RiceOryza sativat0
- Material
- RBe0
- Outcome
- H2O2 levelse0
- Direction
- elevatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“Conversely, RB and RD49 demonstrated adverse effects on growth parameters, with elevated H2O2 levels indicating oxidative stress.”
Claim · model-written summary
RD49 showed elevated H2O2 levels indicating oxidative stress.
- Taxon
- RiceOryza sativat0
- Material
- RD49e0
- Outcome
- H2O2 levelse0
- Direction
- elevatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e0“Conversely, RB and RD49 demonstrated adverse effects on growth parameters, with elevated H2O2 levels indicating oxidative stress.”
The same questions in other papers
chitosan · growth · Oryza sativa (rice)Results differ
16 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 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.