Abstract
Experiment was conducted to assess drought-tolerance in two common bean genotypes by inducing stress at flower initiation stage on the basis of inherent stress tolerance characters viz.total chlorophyll content, chlorophyll stability index, nitrate reductase activity, total free proline content and drought susceptibility index. Foliar spray of ABA, calcium and potassium was also applied to check whether they enhance drought tolerance by showing their impact on these parameters. Seeds of fifty common bean genotypes were evaluated for drought tolerance in laboratory by simulation with two PEG-6000 osmotic potential levels (-0.3 MPa and-0.5 MPa). Reduction in germination percentage, plumule and radicle length was observed in KR 84 and KR 257 genotypes. Pot trial revealed that drought stress at flower initiation stage significantly reduced total chlorophyll content, chlorophyll stability index, nitrate reductase activity and drought susceptibility index whereas total free proline content was significantly enhanced. Foliar application of ABA, calcium and potassium effectively ameliorated the negative effects of drought stress in both genotypes. Reduction in drought susceptibility index was also observed under these treatments as compared to stressed and non-treated plants. Foliar application of ABA, calcium and potassium effectively elevated various biochemical parameters, however these foliar treatments displayed lower accumulation of total free proline conferring lower drought sensitivity of genotypes after foliar application. Abscisic acid 20 ppm and CaCl2 0.5% were found to be most effective and surpassed other treatments.
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Claims 9
Claim · model-written summary
PEG osmotic stress reduced germination percentage, plumule length and radicle length in KR 84 and KR 257.
- Taxon
- Common Bean
Phaseolus vulgarist0 - Material
- KR 84 and KR 257e0
- Treatment
- PEG-6000 osmotic potential levels (-0.3 MPa and-0.5 MPa)e0
- Outcome
- germination percentage, plumule and radicle lengthe0
- Direction
- Reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of fifty common bean genotypes were evaluated for drought tolerance in laboratory by simulation with two PEG-6000 osmotic potential levels (-0.3 MPa and-0.5 MPa). Reduction in germination percentage, plumule and radicle length was observed in KR 84 and KR 257 genotypes”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Drought at flower initiation significantly reduced chlorophyll content, stability index and nitrate reductase activity.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- drought stress at flower initiation stagee0
- Outcome
- total chlorophyll content, chlorophyll stability index, nitrate reductase activitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress at flower initiation stage significantly reduced total chlorophyll content, chlorophyll stability index, nitrate reductase activity and drought susceptibility index”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Drought significantly reduced drought susceptibility index.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- drought stress at flower initiation stagee0
- Outcome
- drought susceptibility indexe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress at flower initiation stage significantly reduced total chlorophyll content, chlorophyll stability index, nitrate reductase activity and drought susceptibility index”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Drought significantly enhanced total free proline content.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- drought stress at flower initiation stagee1
- Outcome
- total free proline contente0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total free proline content was significantly enhanced”
e1“drought stress at flower initiation stage significantly reduced”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Foliar ABA, calcium and potassium ameliorated drought stress effects in both genotypes.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- Foliar application of ABA, calcium and potassiume0
- Outcome
- negative effects of drought stresse0
- Direction
- amelioratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of ABA, calcium and potassium effectively ameliorated the negative effects of drought stress in both genotypes”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Foliar treatments reduced drought susceptibility index versus stressed untreated plants.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- Foliar application of ABA, calcium and potassiume1
- Outcome
- drought susceptibility indexe0
- Direction
- Reductione0
- Comparator
- stressed and non-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction in drought susceptibility index was also observed under these treatments as compared to stressed and non-treated plants”
e1“Foliar application of ABA, calcium and potassium effectively ameliorated the negative effects of drought stress”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Foliar ABA, calcium and potassium elevated biochemical parameters.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- Foliar application of ABA, calcium and potassiume0
- Outcome
- various biochemical parameterse0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of ABA, calcium and potassium effectively elevated various biochemical parameters”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Foliar treatments lowered total free proline accumulation.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- foliar treatmentse0
- Outcome
- accumulation of total free prolinee0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these foliar treatments displayed lower accumulation of total free proline”
t0“Common Bean (Phaseolus vulgaris L.)”
Claim · model-written summary
Abscisic acid at 20 ppm and CaCl2 at 0.5% were the most effective treatments.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- Abscisic acid 20 ppm and CaCl2 0.5%e0
- Outcome
- most effectivee0
- Direction
- surpassede0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abscisic acid 20 ppm and CaCl2 0.5% were found to be most effective and surpassed other treatments”
t0“Common Bean (Phaseolus vulgaris L.)”
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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.