Abstract
Three popular traditional rice landraces, namely Kalajeera, Machakanta and Haladichudi, from Koraput, India were used to analyse the leaf traits and antioxidant defence for drought tolerance. When rice plants were exposed to different levels of drought stress by varying concentrations of polyethylene glycol (PEG) 6000, seed germination and growth parameters were significantly declined in all the rice landraces compared to the control. Drought stress also altered the leaf phenotypic traits based on chlorophyll fluorescence parameters and chlorophyll index, with more significant differences in susceptible variety IR64 than in traditional landraces. Furthermore, activities of antioxidative enzymes and proline and protein contents overtly increased under drought stress. The traditional rice landraces showed higher relative ratios for different parameters compared to the susceptible variety IR64. Taken together, the traditional landraces had superior leaf physiological efficiency compared to the susceptible and tolerant check varieties under drought stress.
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Claims 6
Claim · model-written summary
PEG drought stress significantly reduced seed germination and growth parameters in all rice landraces relative to control.
- Taxon
- rice
Oryza sativae0 - Treatment
- different levels of drought stress by varying concentrations of polyethylene glycol (PEG) 6000e0
- Outcome
- seed germination and growth parameterse0
- Direction
- declinede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When rice plants were exposed to different levels of drought stress by varying concentrations of polyethylene glycol (PEG) 6000, seed germination and growth parameters were significantly declined in all the rice landraces compared to the control.”
Claim · model-written summary
Drought altered leaf fluorescence and chlorophyll index more in IR64 than traditional landraces.
- Taxon
- riceOryza sativat0
- Material
- IR64e0
- Treatment
- Drought stresse0
- Outcome
- chlorophyll fluorescence parameters and chlorophyll indexe0
- Comparator
- traditional landracese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress also altered the leaf phenotypic traits based on chlorophyll fluorescence parameters and chlorophyll index, with more significant differences in susceptible variety IR64 than in traditional landraces.”
t0“Rice”
Claim · model-written summary
Drought increased antioxidative enzyme activities.
- Taxon
- riceOryza sativat0
- Treatment
- drought stresse0
- Outcome
- activities of antioxidative enzymese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of antioxidative enzymes and proline and protein contents overtly increased under drought stress.”
t0“rice”
Claim · model-written summary
Drought increased proline and protein contents.
- Taxon
- riceOryza sativat0
- Treatment
- drought stresse0
- Outcome
- proline and protein contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of antioxidative enzymes and proline and protein contents overtly increased under drought stress.”
t0“rice”
Claim · model-written summary
Traditional landraces had higher relative ratios across parameters than IR64.
- Taxon
- riceOryza sativae0
- Outcome
- relative ratios for different parameterse0
- Direction
- highere0
- Comparator
- susceptible variety IR64e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The traditional rice landraces showed higher relative ratios for different parameters compared to the susceptible variety IR64.”
Claim · model-written summary
Traditional landraces showed superior leaf physiological efficiency under drought relative to check varieties.
- Taxon
- riceOryza sativat0
- Treatment
- drought stresse0
- Outcome
- leaf physiological efficiencye0
- Direction
- superiore0
- Comparator
- susceptible and tolerant check varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the traditional landraces had superior leaf physiological efficiency compared to the susceptible and tolerant check varieties under drought stress.”
t0“rice”
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