Abstract
An experiment was planned to visualize the impact of terminal heat stress on yield potentials of late sown mustard cultivars under the changing climatic conditions. A set of fifteen B. juncea genotypes were evaluated at two planting dates during two winter seasons. Late planted genotypes faced heat stress during post anthesis/seed filling stage which negatively influenced the movements of photosynthates to developing sinks thus inhibiting synthetic processes, lowering seed weight and seed yield and may even hamper seed quality. Onset of flowering and siliquing were delayed but the completion of flowering and siliquae formation was earlier in the late planted genotypes. Seed filling was impeded by high temperature in late planting causing ≥50% decline in seed yield. Average accumulated growing degree days (AGDD) for phenological stages were higher in normal sown than the late sown crop. AGDD witnessed an increasing trend for flowering and fruiting behaviour in both the sowing dates. However, 50% flowering in late sown crop took 4 accumulated GDDoC days more. Average heat use efficiency was found to be significantly higher in normal sown genotypes for seed (0.95 kg ha-1 ºC-days-1 ) and biological (0.53 kg ha-1 ºC-days-1 ) yield relative to the late sown genotypes for seed (0.50 kg ha-1 ºC-days-1 ) and biological yield (2.71 kg ha-1 ºC-days-1 ). Seed yield under late sown condition had positive and significant correlation with siliquing duration (r= 0.600*) and reproductive phase (r= 0.558*) whereas, negative with flowering completion (r= -0.573*) and siliqua initiation (r= -0.519*). Based on the results IAN was the best genotype for delayed sowings.
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Claims 17
Claim · model-written summary
Late planting heat stress reduced seed weight.
- Taxon
- brassica juncea
Brassica junceat0 - Treatment
- heat stresse0
- Outcome
- seed weighte0
- Direction
- loweringe0
- Qualifier
- post anthesis/seed filling stagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late planted genotypes faced heat stress during post anthesis/seed filling stage which negatively influenced the movements of photosynthates to developing sinks thus inhibiting synthetic processes, lowering seed weight and seed yield”
t0“brassica juncea”
Claim · model-written summary
Late planting heat stress reduced seed yield.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- heat stresse0
- Outcome
- seed yielde0
- Direction
- loweringe0
- Qualifier
- post anthesis/seed filling stagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late planted genotypes faced heat stress during post anthesis/seed filling stage which negatively influenced the movements of photosynthates to developing sinks thus inhibiting synthetic processes, lowering seed weight and seed yield”
t0“brassica juncea”
Claim · model-written summary
Late planting delayed flowering onset.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- late plantede1
- Outcome
- Onset of floweringe0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onset of flowering and siliquing were delayed”
e1“late planted genotypes”
t0“brassica juncea”
Claim · model-written summary
Late planting delayed siliquing onset.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- late plantede1
- Outcome
- siliquinge0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onset of flowering and siliquing were delayed”
e1“late planted genotypes”
t0“brassica juncea”
Claim · model-written summary
Flowering completion occurred earlier under late planting.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- late plantede0
- Outcome
- completion of floweringe0
- Direction
- earliere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the completion of flowering and siliquae formation was earlier in the late planted genotypes”
t0“brassica juncea”
Claim · model-written summary
Siliqua formation completed earlier under late planting.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- late plantede0
- Outcome
- siliquae formatione0
- Direction
- earliere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the completion of flowering and siliquae formation was earlier in the late planted genotypes”
t0“brassica juncea”
Claim · model-written summary
High temperature with late planting caused a decline of at least 50% in seed yield.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- high temperature in late plantinge0
- Outcome
- seed yielde0
- Direction
- declinee0
- Value
- ≥50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed filling was impeded by high temperature in late planting causing ≥50% decline in seed yield”
t0“brassica juncea”
Claim · model-written summary
Average accumulated growing degree days for phenological stages were higher under normal than late sowing.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- normal sowne0
- Outcome
- Average accumulated growing degree days (AGDD) for phenological stagese0
- Direction
- highere0
- Comparator
- late sown crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average accumulated growing degree days (AGDD) for phenological stages were higher in normal sown than the late sown crop”
t0“brassica juncea”
Claim · model-written summary
AGDD increased across flowering and fruiting under both sowing dates.
- Taxon
- brassica junceaBrassica junceat0
- Outcome
- AGDDe0
- Direction
- increasinge0
- Qualifier
- both the sowing datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AGDD witnessed an increasing trend for flowering and fruiting behaviour in both the sowing dates”
t0“brassica juncea”
Claim · model-written summary
Half flowering under late sowing required four more accumulated degree days.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- late sown crope0
- Outcome
- 50% floweringe0
- Direction
- moree0
- Value
- 4 accumulated GDDoC dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“50% flowering in late sown crop took 4 accumulated GDDoC days more”
t0“brassica juncea”
Claim · model-written summary
Seed-yield heat-use efficiency was significantly higher in normal sowing, 0.95 versus 0.50 kg ha-1 ºC-days-1.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- normal sowne0
- Outcome
- heat use efficiencye0
- Direction
- highere0
- Value
- 0.95 kg ha-1 ºC-days-1e0
- Qualifier
- 0.50 kg ha-1 ºC-days-1e0
- Comparator
- late sown genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average heat use efficiency was found to be significantly higher in normal sown genotypes for seed (0.95 kg ha-1 ºC-days-1 ) and biological (0.53 kg ha-1 ºC-days-1 ) yield relative to the late sown genotypes for seed (0.50 kg ha-1 ºC-days-1 ) and biological yield (2.71 kg ha-1 ºC-days-1 )”
t0“brassica juncea”
Claim · model-written summary
The abstract says biological-yield heat-use efficiency was higher in normal sowing but reports 0.53 versus 2.71 kg ha-1 ºC-days-1.
- Taxon
- brassica junceaBrassica junceat0
- Treatment
- normal sowne0
- Outcome
- heat use efficiencye0
- Direction
- highere0
- Value
- 0.53 kg ha-1 ºC-days-1e0
- Qualifier
- 2.71 kg ha-1 ºC-days-1e0
- Comparator
- late sown genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average heat use efficiency was found to be significantly higher in normal sown genotypes for seed (0.95 kg ha-1 ºC-days-1 ) and biological (0.53 kg ha-1 ºC-days-1 ) yield relative to the late sown genotypes for seed (0.50 kg ha-1 ºC-days-1 ) and biological yield (2.71 kg ha-1 ºC-days-1 )”
t0“brassica juncea”
Claim · model-written summary
Late-sown seed yield correlated positively with siliquing duration.
- Taxon
- brassica junceaBrassica junceat0
- Organ / stage
- siliquing duratione0
- Outcome
- Seed yielde0
- Direction
- positivee0
- Value
- r= 0.600*e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield under late sown condition had positive and significant correlation with siliquing duration (r= 0.600*)”
t0“brassica juncea”
Claim · model-written summary
Late-sown seed yield correlated positively with reproductive phase.
- Taxon
- brassica junceaBrassica junceat0
- Organ / stage
- reproductive phasee0
- Outcome
- Seed yielde0
- Direction
- positivee0
- Value
- r= 0.558*e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield under late sown condition had positive and significant correlation with siliquing duration (r= 0.600*) and reproductive phase (r= 0.558*)”
t0“brassica juncea”
Claim · model-written summary
Late-sown seed yield correlated negatively with flowering completion.
- Taxon
- brassica junceaBrassica junceat0
- Organ / stage
- flowering completione0
- Outcome
- Seed yielde1
- Direction
- negativee0
- Value
- r= -0.573*e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative with flowering completion (r= -0.573*)”
e1“Seed yield under late sown condition”
t0“brassica juncea”
Claim · model-written summary
Late-sown seed yield correlated negatively with siliqua initiation.
- Taxon
- brassica junceaBrassica junceat0
- Organ / stage
- siliqua initiatione0
- Outcome
- Seed yielde1
- Direction
- negativee0
- Value
- r= -0.519*e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative with flowering completion (r= -0.573*) and siliqua initiation (r= -0.519*)”
e1“Seed yield under late sown condition”
t0“brassica juncea”
Claim · model-written summary
IAN was judged the best genotype for delayed sowing.
- Taxon
- brassica junceaBrassica junceat0
- Material
- IANe0
- Outcome
- best genotypee0
- Qualifier
- delayed sowingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAN was the best genotype for delayed sowings”
t0“brassica juncea”
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See all 26 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.