Abstract
Peanut stands often face water deficits in the tropics and subtropics, especially in drought‐prone areas of India. The effect of drought on peanut production has previously been studied. However, there is a lack of information on the post‐stress recovery mechanism. The objective of this study was to investigate the recovery mechanism after relief of water stress. The effect of short‐term drought applied (for 12 days) at the pre‐flowering, peak flowering and pod‐filling stages on chlorophyll (Chl) pigments, water use efficiency (W ue ), quantum yield (Q y ), root/shoot ratio (R:S), relative growth rate (RGR), net assimilation rate (NAR) and flower production during stress and subsequent post‐stress recovery was examined. The leaf water potential (ψ leaf ) and leaf relative water content (RWC) in plants subjected to water deficit were reduced to 1/10 and 2/3, respectively, of the corresponding control values. Moisture deficit significantly reduced Chl a and b concentrations, the Chl a/b ratio, stomatal conductance, photosynthesis, W ue and Q y . However, a strong recovery of these traits was noted after rewatering, which led to onset of fresh growth on post‐stress, with a marked increase in RGR and NAR and a flush of flowering. Drought significantly enhanced R:S, which accelerated post‐stress recovery. Peanut stands exhibited excellent ecophysiological recovery with the post‐stress onset of fresh growth. This strong recovery mechanism found in peanut stands suggests that peanut has high environmental plasticity.
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Claims 10
Claim · model-written summary
Water deficit reduced peanut leaf water potential to one tenth of control.
- Taxon
- Peanut
Arachis hypogaeat0 - Treatment
- water deficite0
- Outcome
- leaf water potentiale0
- Direction
- reducede0
- Value
- 1/10e0
- Comparator
- corresponding control valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf water potential (ψ leaf ) and leaf relative water content (RWC) in plants subjected to water deficit were reduced to 1/10 and 2/3, respectively, of the corresponding control values.”
t0“Peanut”
Claim · model-written summary
Water deficit reduced peanut leaf relative water content to two thirds of control.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- water deficite0
- Outcome
- leaf relative water contente0
- Direction
- reducede0
- Value
- 2/3e0
- Comparator
- corresponding control valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf water potential (ψ leaf ) and leaf relative water content (RWC) in plants subjected to water deficit were reduced to 1/10 and 2/3, respectively, of the corresponding control values.”
t0“Peanut”
Claim · model-written summary
Drought significantly reduced peanut chlorophyll concentrations and chlorophyll ratio.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- Moisture deficite0
- Outcome
- Chl a and b concentrations, the Chl a/b ratioe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moisture deficit significantly reduced Chl a and b concentrations, the Chl a/b ratio, stomatal conductance, photosynthesis, W ue and Q y .”
t0“Peanut”
Claim · model-written summary
Drought significantly reduced peanut stomatal conductance, photosynthesis and water use efficiency.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- Moisture deficite0
- Outcome
- stomatal conductance, photosynthesis, W uee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moisture deficit significantly reduced Chl a and b concentrations, the Chl a/b ratio, stomatal conductance, photosynthesis, W ue and Q y .”
t0“Peanut”
Claim · model-written summary
Drought significantly reduced peanut quantum yield.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- Moisture deficite0
- Outcome
- Q ye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moisture deficit significantly reduced Chl a and b concentrations, the Chl a/b ratio, stomatal conductance, photosynthesis, W ue and Q y .”
t0“Peanut”
Claim · model-written summary
Peanut physiological traits strongly recovered after rewatering.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- rewateringe0
- Outcome
- strong recovery of these traitse0
- Direction
- strong recoverye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, a strong recovery of these traits was noted after rewatering, which led to onset of fresh growth on post‐stress, with a marked increase in RGR and NAR and a flush of flowering.”
t0“Peanut”
Claim · model-written summary
After rewatering peanut relative growth and net assimilation rates increased markedly.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- rewateringe0
- Outcome
- RGR and NARe0
- Direction
- marked increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, a strong recovery of these traits was noted after rewatering, which led to onset of fresh growth on post‐stress, with a marked increase in RGR and NAR and a flush of flowering.”
t0“Peanut”
Claim · model-written summary
Rewatering was followed by a flush of peanut flowering.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- rewateringe0
- Outcome
- flush of floweringe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, a strong recovery of these traits was noted after rewatering, which led to onset of fresh growth on post‐stress, with a marked increase in RGR and NAR and a flush of flowering.”
t0“Peanut”
Claim · model-written summary
Drought significantly increased peanut root to shoot ratio.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- Droughte0
- Outcome
- R:Se0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought significantly enhanced R:S, which accelerated post‐stress recovery.”
t0“Peanut”
Claim · model-written summary
Higher root to shoot ratio accelerated peanut post-stress recovery.
- Taxon
- PeanutArachis hypogaeat0
- Organ / stage
- R:Se0
- Outcome
- post‐stress recoverye0
- Direction
- acceleratede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought significantly enhanced R:S, which accelerated post‐stress recovery.”
t0“Peanut”
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