Abstract
Abstract The comparative sensitivity of nitrogen fixation process in three crop legumes, vis., mung bean, cluster bean and moth bean was evaluated under varying intensities of water stress in a pot culture experiment. Even a mild level of stress, i.e., a drop in plant water potential (ψplant) of — 0.4 MPa significantly reduced the nitro‐genase activity in all the three species, while the nodule number and fresh weight showed a gradual decline with increasing stress. The threshold limits for nitrogenase activity (the ψplant beyond which no activity could be detected) were found to be —2.4, —2.2 and — 1.8 MPa in cluster bean, mung bean, and moth bean, respectively. For a comparative stress level the activity in cluster bean was found to be the least sensitive followed by mung bean and moth bean. With increasing stress intensity there was an accumulation of ureides in both the nodules and shoots of mung bean and moth bean while no effect was found in cluster bean. Water stress also caused a reduction in transpiration and shoot dry weight in all the three species.
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Claims 9
Claim · model-written summary
A mild water stress (plant water potential drop of 0.4 MPa) significantly reduced nitrogenase activity in all three legumes.
- Taxon
- mung bean, cluster bean and moth bean
Cyamopsis tetragonoloba
Vigna aconitifolia.jpg?width=60)
Vigna radiatae0 - Treatment
- drop in plant water potential (ψplant) of — 0.4 MPae1
- Outcome
- nitro‐genase activitye1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“mung bean, cluster bean and moth bean”
e1“a drop in plant water potential (ψplant) of — 0.4 MPa significantly reduced the nitro‐genase activity in all the three species”
Claim · model-written summary
Nodule number and nodule fresh weight declined gradually with increasing water stress.
- Taxon
- mung bean, cluster bean and moth beanCyamopsis tetragonolobaVigna aconitifoliaVigna radiatae0
- Treatment
- increasing stresse1
- Outcome
- nodule number and fresh weighte1
- Direction
- declinee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mung bean, cluster bean and moth bean”
e1“the nodule number and fresh weight showed a gradual decline with increasing stress”
Claim · model-written summary
The water potential threshold for nitrogenase activity in cluster bean was -2.4 MPa.
- Taxon
- cluster beanCyamopsis tetragonolobae2
- Outcome
- threshold limits for nitrogenase activitye1
- Value
- —2.4e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The threshold limits for nitrogenase activity”
e2“—2.4, —2.2 and — 1.8 MPa in cluster bean, mung bean, and moth bean, respectively”
Claim · model-written summary
The water potential threshold for nitrogenase activity in mung bean was -2.2 MPa.
- Taxon
- mung beanVigna radiatae2
- Outcome
- threshold limits for nitrogenase activitye1
- Value
- —2.2e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The threshold limits for nitrogenase activity”
e2“—2.4, —2.2 and — 1.8 MPa in cluster bean, mung bean, and moth bean, respectively”
Claim · model-written summary
The water potential threshold for nitrogenase activity in moth bean was -1.8 MPa.
- Taxon
- moth beanVigna aconitifoliae2
- Outcome
- threshold limits for nitrogenase activitye1
- Value
- — 1.8 MPae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The threshold limits for nitrogenase activity”
e2“—2.4, —2.2 and — 1.8 MPa in cluster bean, mung bean, and moth bean, respectively”
Claim · model-written summary
At a comparable stress level, nitrogenase activity was least sensitive in cluster bean, followed by mung bean and moth bean.
- Taxon
- cluster beanCyamopsis tetragonolobae0
- Outcome
- least sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity in cluster bean was found to be the least sensitive followed by mung bean and moth bean”
Claim · model-written summary
Increasing water stress led to ureide accumulation in the nodules and shoots of mung bean and moth bean.
- Taxon
- mung bean and moth beanVigna aconitifoliaVigna radiatae0
- Organ / stage
- nodules and shootse0
- Treatment
- increasing stress intensitye0
- Outcome
- ureidese0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing stress intensity there was an accumulation of ureides in both the nodules and shoots of mung bean and moth bean”
Claim · model-written summary
Increasing water stress had no effect on ureides in cluster bean.
- Taxon
- cluster beanCyamopsis tetragonolobae0
- Treatment
- increasing stress intensitye0
- Outcome
- ureidese0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing stress intensity there was an accumulation of ureides in both the nodules and shoots of mung bean and moth bean while no effect was found in cluster bean”
Claim · model-written summary
Water stress reduced transpiration and shoot dry weight in all three species.
- Taxon
- mung bean, cluster bean and moth beanCyamopsis tetragonolobaVigna aconitifoliaVigna radiatae0
- Treatment
- Water stresse1
- Outcome
- transpiration and shoot dry weighte1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mung bean, cluster bean and moth bean”
e1“Water stress also caused a reduction in transpiration and shoot dry weight in all the three species”
The same questions in other papers
drought · physiology: gas exchange · Vigna radiata (mung bean)Results 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.