Abstract
(L.) Millsp.), a potential legume as an economic source of protein, is commonly cultivated in tropical and subtropical regions of the world. It possesses medicinal properties and acts as a cash crop, benefiting low-income farmers economically. The identification of pigeon peas exhibiting drought tolerance has become crucial in addressing water scarcity issues in the agriculture sector. In addition, exploring the genetic diversity among genotypes is important for conservation, management of genetic resources, and breeding programs. The aim of this study was to evaluate the morpho-physiological and biochemical responses of selected pigeon pea genotypes under pot-induced water stress conditions through different field capacities as well as the genetic diversity using start codon targeted (SCoT) markers. A significant variation was observed for the physiological traits studied. The accumulation of fresh weight (FW) and dry weight (DW) was significantly reduced in moderate and severe drought stress conditions. The lowest % DW decrease was found in LM (35.39%), KAT (39.43%), and SM (46.98%) than other genotypes at severe drought stress. Analyses of physiological responses including the photosynthetic efficiency (Phi2), the chlorophyll content (SPAD), and the relative water content (RWC) revealed positive and negative correlations with various parameters, reflecting the impact of drought stress on the chlorophyll content. The results revealed that biochemical traits including the total phenolic content, soluble sugars, proline, total protein, total amino acids, and free amino acids were variably and significantly increased under water stress. Antioxidant enzyme activity levels, specifically ascorbate peroxidase (APX) and catalase, varied among the genotypes and in response to severe water stress, offering further insights into adaptive responses. The eight genotypes analysed by use of 20 SCoT markers revealed 206 alleles and an average of 10.3 alleles per locus. Genetic similarity ranged from 0.336 to 0.676, clustering the pigeon pea genotypes into two major groups by the unweighted pair group method of arithmetic averages (UPGMA) cluster analysis. Principal coordinate analysis (PCoA) explained 43.11% of genetic variation and based on analysis of molecular variance, a high genetic variation (80%) within populations was observed, emphasizing the potential for genetic improvement. Among the eight genotypes studied, LM and KAT were drought tolerant and genetically diverse and therefore could be used as parents for developing drought tolerance in pigeon pea.
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Claims 17
Claim · model-written summary
Fresh weight fell significantly under moderate and severe drought.
- Taxon
- Pigeon Pea
Cajanus cajant0 - Treatment
- moderate and severe drought stress conditionse0
- Outcome
- fresh weight (FW)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“The accumulation of fresh weight (FW) and dry weight (DW) was significantly reduced in moderate and severe drought stress conditions”
Claim · model-written summary
Dry weight fell significantly under moderate and severe drought.
- Taxon
- Pigeon PeaCajanus cajant0
- Treatment
- moderate and severe drought stress conditionse0
- Outcome
- dry weight (DW)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“The accumulation of fresh weight (FW) and dry weight (DW) was significantly reduced in moderate and severe drought stress conditions”
Claim · model-written summary
LM had the lowest dry weight decrease of 35.39% under severe drought.
- Taxon
- Pigeon PeaCajanus cajant0
- Material
- LMe0
- Treatment
- severe drought stresse0
- Outcome
- % DW decreasee0
- Direction
- decreasee0
- Value
- 35.39%e0
- Comparator
- other genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“The lowest % DW decrease was found in LM (35.39%), KAT (39.43%), and SM (46.98%) than other genotypes at severe drought stress”
Claim · model-written summary
KAT had a 39.43% dry weight decrease under severe drought.
- Taxon
- Pigeon PeaCajanus cajant0
- Material
- KATe0
- Treatment
- severe drought stresse0
- Outcome
- % DW decreasee0
- Direction
- decreasee0
- Value
- 39.43%e0
- Comparator
- other genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“The lowest % DW decrease was found in LM (35.39%), KAT (39.43%), and SM (46.98%) than other genotypes at severe drought stress”
Claim · model-written summary
SM had a 46.98% dry weight decrease under severe drought.
- Taxon
- Pigeon PeaCajanus cajant0
- Material
- SMe0
- Treatment
- severe drought stresse0
- Outcome
- % DW decreasee0
- Direction
- decreasee0
- Value
- 46.98%e0
- Comparator
- other genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“The lowest % DW decrease was found in LM (35.39%), KAT (39.43%), and SM (46.98%) than other genotypes at severe drought stress”
Claim · model-written summary
Photosynthetic efficiency, chlorophyll content and relative water content showed positive and negative correlations with other parameters.
- Taxon
- Pigeon PeaCajanus cajant0
- Outcome
- photosynthetic efficiency (Phi2), the chlorophyll content (SPAD), and the relative water content (RWC)e0
- Qualifier
- positive and negative correlations with various parameterse0
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“the photosynthetic efficiency (Phi2), the chlorophyll content (SPAD), and the relative water content (RWC) revealed positive and negative correlations with various parameters”
Claim · model-written summary
Total phenolic content, soluble sugars and proline increased significantly under water stress.
- Taxon
- Pigeon PeaCajanus cajant0
- Treatment
- water stresse0
- Outcome
- total phenolic content, soluble sugars, prolinee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“total phenolic content, soluble sugars, proline, total protein, total amino acids, and free amino acids were variably and significantly increased under water stress”
Claim · model-written summary
Total protein, total amino acids and free amino acids increased significantly under water stress.
- Taxon
- Pigeon PeaCajanus cajant0
- Treatment
- water stresse0
- Outcome
- total protein, total amino acids, and free amino acidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“total phenolic content, soluble sugars, proline, total protein, total amino acids, and free amino acids were variably and significantly increased under water stress”
Claim · model-written summary
APX and catalase activity varied among genotypes and under severe water stress.
- Taxon
- Pigeon PeaCajanus cajant0
- Treatment
- severe water stresse0
- Gene
- ascorbate peroxidase (APX) and catalasee0
- Outcome
- Antioxidant enzyme activity levelse0
- Direction
- variede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“Antioxidant enzyme activity levels, specifically ascorbate peroxidase (APX) and catalase, varied among the genotypes and in response to severe water stress”
Claim · model-written summary
SCoT screening found 206 alleles among eight genotypes.
- Taxon
- Pigeon PeaCajanus cajant0
- Outcome
- allelese0
- Value
- 206 allelese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“The eight genotypes analysed by use of 20 SCoT markers revealed 206 alleles and an average of 10.3 alleles per locus”
Claim · model-written summary
SCoT screening found an average 10.3 alleles per locus.
- Taxon
- Pigeon PeaCajanus cajant0
- Outcome
- alleles per locuse0
- Value
- 10.3 alleles per locuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“an average of 10.3 alleles per locus”
Claim · model-written summary
Genetic similarity ranged from 0.336 to 0.676.
- Taxon
- Pigeon PeaCajanus cajant0
- Outcome
- Genetic similaritye0
- Value
- 0.336 to 0.676e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“Genetic similarity ranged from 0.336 to 0.676”
Claim · model-written summary
Pigeon pea genotypes clustered into two major groups.
- Taxon
- pigeon peaCajanus cajane0
- Outcome
- two major groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“clustering the pigeon pea genotypes into two major groups”
Claim · model-written summary
PCoA explained 43.11% of genetic variation.
- Taxon
- Pigeon PeaCajanus cajant0
- Outcome
- genetic variatione0
- Value
- 43.11%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“Principal coordinate analysis (PCoA) explained 43.11% of genetic variation”
Claim · model-written summary
Within-population genetic variation was 80%.
- Taxon
- Pigeon PeaCajanus cajant0
- Outcome
- genetic variatione0
- Value
- 80%e0
- Qualifier
- within populationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“a high genetic variation (80%) within populations was observed”
Claim · model-written summary
LM and KAT were drought tolerant and genetically diverse.
- Taxon
- Pigeon PeaCajanus cajant0
- Material
- LM and KATe0
- Outcome
- drought tolerant and genetically diversee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“LM and KAT were drought tolerant and genetically diverse”
Claim · model-written summary
The authors proposed LM and KAT as parents for breeding drought tolerance.
- Taxon
- pigeon peaCajanus cajane0
- Material
- LM and KATe0
- Outcome
- could be used as parents for developing drought tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pigeon Pea (Cajanus cajan L.)”
e0“LM and KAT were drought tolerant and genetically diverse and therefore could be used as parents for developing drought tolerance in pigeon pea”
The same questions in other papers
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drought · physiology: osmolytes · Cajanus cajan (pigeon pea)Positive and negative results
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drought · growth · Cajanus cajan (pigeon pea)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
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5 papers more in this group
See all 9 papers →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.