Abstract
Summary Two tepary (TB) bean lines (NE#19 and NE#5) were subjected to progressive water depletion and rewatering (RW). Under a condition of mild water depletion (MWD), the leaf relative water content (RWC) was similar in both lines and did not significantly differ from the respective well-watered (WW) seedlings. NE#19 under MWD conditions significantly increased stomata resistance and reduced transpiration rate compared to WW seedlings. Also, it showed tendency towards reduction in the intercellular CO 2 and elevated net photosynthesis. Its stem and root mass, specific leaf mass (SLM) increased while the portion of leaf area to 1 mg dry root mass (LA/RDM) decreased compared to the WW ones. NE#5 did not show such changes in gas exchange and plant growth parameters under MWD conditions compared to the WW. Tocopherols (TPH) increased under MWD conditions but no changes occurred in malondialdehyde (MDA) and chlorophyll (Chl) content. Carotenoid and ascorbic acid (AA) contents in NE#19 and peroxidase (POD) activity in NE#5 increased. The rewatered (RW) seedlings showed a decline in TPH and MDA in both TB lines. AA decreased while carotenoid content remained high in NE#19. POD activity increased in NE#5. The fluorescence parameter F v /F m was higher under both MWD and RW than WW conditions for NE#5 but the change in NE#19 was not significant. When subjected to severe water depletion (SWD), the RWC significantly decreased and both TB lines suffered severe dehydration in spite of 11% higher RWC in NE#19 than in NE#5. Compared to the respective WW, both lines had a significant sharp reduction in plant growth (leaf, stem and root) and SLM. However, NE#19 significantly exceeded the WW in LA/RDM and R/S ratio when subjected to SWD. TPH contents in severely dehydrated leaves were 2- (NE#5) to 3- (NE#19) folds the level in the WW ones. NE#5 showed an increase in POD activity but AA contents decreased. In contrast, POD activity in NE#19 did not elevate while AA significantly declined. Chl and carotenoid contents decreased in both lines. While fluorescence parameter F v /F m decreased in both TB lines, the F 0 showed stability only in NE#5. After rehydration, NE#19 remained showing high level of TPH and MDA, a decrease in F v /F m and an increase in F 0 value. This occurred in spite of the elevated AA content. Distinctively, NE#5 showed a recovery after rehydration and is regarded as a more tolerant to withstand severe water deficit than NE#19.
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Claims 20
Claim · model-written summary
Under mild depletion, relative water content did not differ significantly from well-watered seedlings in either line.
- Taxon
- tepary bean
Phaseolus acutifoliust0 - Treatment
- mild water depletion (MWD)e0
- Outcome
- leaf relative water content (RWC)e0
- Direction
- did not significantly differe0
- Comparator
- well-watered (WW) seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under a condition of mild water depletion (MWD), the leaf relative water content (RWC) was similar in both lines and did not significantly differ from the respective well-watered (WW) seedlings.”
t0“tepary bean”
Claim · model-written summary
NE#19 increased stomatal resistance under mild depletion.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#19e0
- Treatment
- MWD conditionse0
- Outcome
- stomata resistancee0
- Direction
- increasede0
- Comparator
- WW seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NE#19 under MWD conditions significantly increased stomata resistance and reduced transpiration rate compared to WW seedlings.”
t0“tepary bean”
Claim · model-written summary
NE#19 reduced transpiration under mild depletion.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#19e0
- Treatment
- MWD conditionse0
- Outcome
- transpiration ratee0
- Direction
- reducede0
- Comparator
- WW seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NE#19 under MWD conditions significantly increased stomata resistance and reduced transpiration rate compared to WW seedlings.”
t0“tepary bean”
Claim · model-written summary
NE#19 tended toward lower intercellular CO2 under mild depletion.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- tepary beant0
- Outcome
- intercellular CO 2e0
- Direction
- reductione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it showed tendency towards reduction in the intercellular CO 2 and elevated net photosynthesis.”
t0“tepary bean”
Claim · model-written summary
NE#19 tended toward elevated net photosynthesis under mild depletion.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Outcome
- net photosynthesise0
- Direction
- elevatede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it showed tendency towards reduction in the intercellular CO 2 and elevated net photosynthesis.”
t0“tepary bean”
Claim · model-written summary
NE#19 stem and root mass and specific leaf mass rose under mild depletion.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Outcome
- stem and root mass, specific leaf mass (SLM)e0
- Direction
- increasede0
- Comparator
- WW onese0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Its stem and root mass, specific leaf mass (SLM) increased while the portion of leaf area to 1 mg dry root mass (LA/RDM) decreased compared to the WW ones.”
t0“tepary bean”
Claim · model-written summary
NE#19 leaf area per root dry mass declined under mild depletion.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Outcome
- portion of leaf area to 1 mg dry root mass (LA/RDM)e0
- Direction
- decreasede0
- Comparator
- WW onese0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the portion of leaf area to 1 mg dry root mass (LA/RDM) decreased compared to the WW ones.”
t0“tepary bean”
Claim · model-written summary
NE#5 showed no analogous gas exchange or growth changes under mild depletion.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#5e0
- Treatment
- MWD conditionse0
- Outcome
- gas exchange and plant growth parameterse0
- Direction
- did not show such changese0
- Comparator
- WWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NE#5 did not show such changes in gas exchange and plant growth parameters under MWD conditions compared to the WW.”
t0“tepary bean”
Claim · model-written summary
Tocopherols increased under mild depletion without malondialdehyde or chlorophyll changes.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Treatment
- MWD conditionse0
- Outcome
- Tocopherols (TPH)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tocopherols (TPH) increased under MWD conditions but no changes occurred in malondialdehyde (MDA) and chlorophyll (Chl) content.”
t0“tepary bean”
Claim · model-written summary
Under mild depletion, NE#19 carotenoid and ascorbic acid contents increased.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#19e0
- Outcome
- Carotenoid and ascorbic acid (AA) contentse0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carotenoid and ascorbic acid (AA) contents in NE#19 and peroxidase (POD) activity in NE#5 increased.”
t0“tepary bean”
Claim · model-written summary
Under mild depletion, NE#5 peroxidase activity increased.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#5e0
- Outcome
- peroxidase (POD) activitye0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peroxidase (POD) activity in NE#5 increased.”
t0“tepary bean”
Claim · model-written summary
Rewatering lowered tocopherols and malondialdehyde in both lines.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Treatment
- rewatered (RW)e0
- Outcome
- TPH and MDAe0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rewatered (RW) seedlings showed a decline in TPH and MDA in both TB lines.”
t0“tepary bean”
Claim · model-written summary
Rewatering reduced ascorbic acid while carotenoids stayed high in NE#19.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#19e0
- Outcome
- AAe0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AA decreased while carotenoid content remained high in NE#19.”
t0“tepary bean”
Claim · model-written summary
NE#5 peroxidase activity increased after rewatering.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#5e0
- Outcome
- POD activitye0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POD activity increased in NE#5.”
t0“tepary bean”
Claim · model-written summary
NE#5 Fv/Fm was higher under both mild depletion and rewatering than well-watered conditions, unlike NE#19.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#5e0
- Treatment
- both MWD and RWe0
- Outcome
- F v /F me0
- Direction
- highere0
- Comparator
- WW conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fluorescence parameter F v /F m was higher under both MWD and RW than WW conditions for NE#5 but the change in NE#19 was not significant.”
t0“tepary bean”
Claim · model-written summary
Severe depletion reduced relative water content, though NE#19 retained 11% more than NE#5.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#19e0
- Outcome
- RWCe0
- Direction
- highere0
- Value
- 11%e0
- Comparator
- NE#5e0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the RWC significantly decreased and both TB lines suffered severe dehydration in spite of 11% higher RWC in NE#19 than in NE#5.”
t0“tepary bean”
Claim · model-written summary
Severe depletion sharply reduced leaf, stem and root growth and specific leaf mass in both lines.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Outcome
- plant growth (leaf, stem and root) and SLMe0
- Direction
- reductione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both lines had a significant sharp reduction in plant growth (leaf, stem and root) and SLM.”
t0“tepary bean”
Claim · model-written summary
Under severe depletion NE#19 exceeded well-watered plants in LA/RDM and R/S ratio.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#19e0
- Treatment
- SWDe0
- Outcome
- LA/RDM and R/S ratioe0
- Direction
- exceedede0
- Comparator
- WWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NE#19 significantly exceeded the WW in LA/RDM and R/S ratio when subjected to SWD.”
t0“tepary bean”
Claim · model-written summary
Severely dehydrated leaves had tocopherol levels twofold in NE#5 and threefold in NE#19 relative to well-watered plants.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Treatment
- severely dehydratede0
- Outcome
- TPH contentse0
- Value
- 2- (NE#5) to 3- (NE#19) foldse0
- Comparator
- WW onese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TPH contents in severely dehydrated leaves were 2- (NE#5) to 3- (NE#19) folds the level in the WW ones.”
t0“tepary bean”
Claim · model-written summary
After rehydration NE#5 recovered better and was judged more tolerant of severe water deficit than NE#19.
- Taxon
- tepary beanPhaseolus acutifoliust0
- Material
- NE#5e0
- Outcome
- recovery after rehydratione0
- Comparator
- NE#19e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NE#5 showed a recovery after rehydration and is regarded as a more tolerant to withstand severe water deficit than NE#19.”
t0“tepary bean”