Abstract
A comparative study was carried out for two groundnut cultivars (cv K-134 and cv JL-24, drought tolerant and drought sensitive, respectively) during water stress at different soil moisture levels [100 (control), 75, 50 and 25%]. The free proline content, activities of pyrroline-5-carboxylate reductase (P5-CR), proline oxidase, proline dehydrogenase (PDH) along with levels of quaternary ammonium compounds, leaf relative water content and chlorophyll stability were investigated. Water stress resulted in a significant accumulation of free proline content in leaves of both groundnut cultivars. However cv K-134 accumulated relatively higher amounts of proline than cv JL-24. Water stress resulted 2.5 fold higher accumulation of proline in cv K-134 and 2.0 fold in cv JL-24 on day-5 at 25% SMLs. Furthermore, the tolerant cv K-134 shows a greater activity of pyrroline-5-carboxylate reductase and lesser inhibition of proline oxidase and proline dehydrogenase than susceptible cv JL-24. The greater proline levels were due to both the higher rates of proline synthesis and lower rate of proline oxidation in cv K-134 compared to cv JL-24. Results of this study indicated that water stress altered the proline metabolism and this alternation was significantly varied between the cultivars. Further, drought tolerance of cv K-134 can be justified by the higher accumulation of quaternary ammonium compounds (glycine betaine) which helps in the maintenance of leaf relative water content and higher chlorophyll stability during water stress as compared to cv JL-24. Abbreviations: SMLs: soil moisture levels; P-5-CR: pyrroline-5-carboxylate reductase; PDH: proline dehydrogenase; QACs: quaternary ammonium compounds; CSI: chlorophyll stability index; RWC: relative water content; DCPIP: dichloro phenol indophenol; EDTA: ethylene diamine tetra acetic acid.
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Claims 10
Claim · model-written summary
Water stress significantly increased leaf free proline in both cultivars.
- Taxon
- groundnut
Arachis hypogaeae0 - Organ / stage
- leavese0
- Treatment
- Water stresse0
- Outcome
- free proline contente0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress resulted in a significant accumulation of free proline content in leaves of both groundnut cultivars”
Claim · model-written summary
K-134 accumulated more proline than JL-24.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv K-134e0
- Outcome
- prolinee0
- Direction
- highere0
- Comparator
- cv JL-24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cv K-134 accumulated relatively higher amounts of proline than cv JL-24”
t0“GROUNDNUT”
Claim · model-written summary
At 25% SML on day 5, K-134 proline accumulation was 2.5 fold.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv K-134e0
- Treatment
- 25% SMLse0
- Outcome
- accumulation of prolinee0
- Direction
- highere0
- Value
- 2.5 folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress resulted 2.5 fold higher accumulation of proline in cv K-134 and 2.0 fold in cv JL-24 on day-5 at 25% SMLs”
t0“GROUNDNUT”
Claim · model-written summary
At 25% SML on day 5, JL-24 proline accumulation was 2.0 fold.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv JL-24e0
- Treatment
- 25% SMLse0
- Outcome
- accumulation of prolinee0
- Direction
- highere0
- Value
- 2.0 folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress resulted 2.5 fold higher accumulation of proline in cv K-134 and 2.0 fold in cv JL-24 on day-5 at 25% SMLs”
t0“GROUNDNUT”
Claim · model-written summary
K-134 had greater pyrroline-5-carboxylate reductase activity than JL-24.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv K-134e0
- Gene
- pyrroline-5-carboxylate reductasee0
- Outcome
- activity of pyrroline-5-carboxylate reductasee0
- Direction
- greatere0
- Comparator
- cv JL-24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tolerant cv K-134 shows a greater activity of pyrroline-5-carboxylate reductase and lesser inhibition of proline oxidase and proline dehydrogenase than susceptible cv JL-24”
t0“GROUNDNUT”
Claim · model-written summary
K-134 showed less inhibition of proline oxidase and dehydrogenase than JL-24.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv K-134e0
- Outcome
- inhibition of proline oxidase and proline dehydrogenasee0
- Direction
- lessere0
- Comparator
- cv JL-24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tolerant cv K-134 shows a greater activity of pyrroline-5-carboxylate reductase and lesser inhibition of proline oxidase and proline dehydrogenase than susceptible cv JL-24”
t0“GROUNDNUT”
Claim · model-written summary
Higher synthesis and lower oxidation explained greater proline in K-134 than JL-24.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv K-134e0
- Outcome
- greater proline levelse0
- Qualifier
- higher rates of proline synthesis and lower rate of proline oxidatione0
- Comparator
- cv JL-24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greater proline levels were due to both the higher rates of proline synthesis and lower rate of proline oxidation in cv K-134 compared to cv JL-24”
t0“GROUNDNUT”
Claim · model-written summary
Water stress altered proline metabolism differently between cultivars.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- water stresse0
- Outcome
- proline metabolisme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress altered the proline metabolism and this alternation was significantly varied between the cultivars”
t0“GROUNDNUT”
Claim · model-written summary
K-134 accumulated more quaternary ammonium compounds than JL-24 during water stress.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv K-134e0
- Outcome
- accumulation of quaternary ammonium compounds (glycine betaine)e0
- Direction
- highere0
- Comparator
- cv JL-24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought tolerance of cv K-134 can be justified by the higher accumulation of quaternary ammonium compounds (glycine betaine) which helps in the maintenance of leaf relative water content and higher chlorophyll stability during water stress as compared to cv JL-24”
t0“GROUNDNUT”
Claim · model-written summary
K-134 maintained higher leaf relative water content and chlorophyll stability during stress than JL-24.
- Taxon
- groundnutArachis hypogaeat0
- Material
- cv K-134e0
- Compound
- glycine betainee0
- Outcome
- leaf relative water content and higher chlorophyll stabilitye0
- Comparator
- cv JL-24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought tolerance of cv K-134 can be justified by the higher accumulation of quaternary ammonium compounds (glycine betaine) which helps in the maintenance of leaf relative water content and higher chlorophyll stability during water stress as compared to cv JL-24”
t0“GROUNDNUT”
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See all 10 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.