Abstract
• Early N acquisition strategy led to unchanged seed N status in droughted plants • papain-like cysteine proteases play a major role in drought-accelerated senescence • cysteine proteinase mucunain-like was the main active PLCP enhanced by drought Climate change models predict increased drought frequency and severity, a threat to rain-fed crops like common bean ( Phaseolus vulgaris L.). Drought adversely affects plant growth, reducing crop yield and quality by limiting carbon (C) and nitrogen (N) supply. While carbon partitioning and sink-source relationships under drought have been extensively studied, the role of nitrogen remobilisation in drought tolerance remains underexplored. This study compares C metabolism and N remobilisation in two common bean genotypes, S156 and R123, submitted to a terminal drought. In response to water limitation, S156 plants exhibited earlier leaf proteolysis notably via a stimulation of papain-like cysteine proteases activity and enhanced nitrogen remobilisation. Both processes were likely responsible for the absence of impact of the terminal drought on the N status of S156 seeds and were sustained by early N acquisition. In comparison, N acquisition and accumulation in R123 relied more on N uptake balanced between vegetative and reproductive stages. We speculated that late N acquisition in R123 was hindered by the terminal drought treatment, and that was not compensated for by drought-induced N remobilisation. These findings highlighted distinct carbon and nitrogen strategies and underscored the importance of N remobilisation for drought tolerance in common bean.
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Claims 6
Claim · model-written summary
S156 showed earlier leaf proteolysis under water limitation.
- Taxon
- common bean
Phaseolus vulgarist0 - Material
- S156e0
- Treatment
- water limitatione0
- Outcome
- leaf proteolysise0
- Direction
- earliere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In response to water limitation, S156 plants exhibited earlier leaf proteolysis”
t0“common bean”
Claim · model-written summary
S156 showed stimulated papain-like cysteine protease activity.
- Taxon
- common beanPhaseolus vulgarist0
- Gene
- papain-like cysteine proteasese0
- Outcome
- papain-like cysteine proteases activitye0
- Direction
- stimulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a stimulation of papain-like cysteine proteases activity”
t0“common bean”
Claim · model-written summary
S156 showed enhanced nitrogen remobilisation.
- Taxon
- common beanPhaseolus vulgarist0
- Outcome
- nitrogen remobilisatione0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced nitrogen remobilisation”
t0“common bean”
Claim · model-written summary
Terminal drought did not affect S156 seed nitrogen status.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- S156e0
- Treatment
- terminal droughte0
- Outcome
- N status of S156 seedse0
- Direction
- absence of impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“absence of impact of the terminal drought on the N status of S156 seeds”
t0“common bean”
Claim · model-written summary
R123 nitrogen acquisition relied more on uptake spanning vegetative and reproductive stages.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- R123e0
- Organ / stage
- vegetative and reproductive stagese0
- Outcome
- N acquisition and accumulatione0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N acquisition and accumulation in R123 relied more on N uptake balanced between vegetative and reproductive stages”
t0“common bean”
Claim · model-written summary
The authors speculate drought hindered late nitrogen acquisition in R123.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- R123e0
- Treatment
- terminal drought treatmente0
- Outcome
- late N acquisitione0
- Direction
- hinderede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“late N acquisition in R123 was hindered by the terminal drought treatment”
t0“common bean”
The same questions in other papers
drought · nutrient: content · Phaseolus vulgaris (common bean)Positive and negative results
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