Abstract
Medikus), particularly during reproductive growth and seed filling. The present study aimed to (i) investigate the individual and combined effects of heat and drought stress during seed filling, (ii) determine the response of lentil genotypes with contrasting heat and drought sensitivity, and (iii) assess any cross tolerance in contrasting genotypes. For this purpose, eight lentil genotypes (two drought-tolerant, two drought-sensitive, two heat-tolerant, two heat-sensitive) were either sown at the normal time (second week of November 2014), when the temperatures at the time of seed filling were below 30/20°C (day/night), or sown late (second week of February 2015) to impose heat stress (temperatures > 30/20°C (day/night) during reproducive growth and seed filling. Half of the pots in each sowing environment were fully watered throughout (100% field capacity) while the others had water withheld (50% of field capacity) from the start of seed filling to maturity. Both heat and drought, individually or in combination, damaged cell membranes, photosynthetic traits and water relations; the effects were more severe with the combined stress. RuBisCo and stomatal conductance increased with heat stress but decreased with drought and the combined stress. Leaf and seed sucrose decreased with each stress in conjunction with its biosynthetic enzyme, while its (sucrose) hydrolysis increased under heat and drought stress, but was inhibited due to combination of stresses. Starch increased under heat stress in leaves but decreased in seeds, but drastically declined in seeds under drought alone or in combination with heat stress. At the same time, starch hydrolysis in leaves and seeds increased resulting in an accumulation of reducing sugars. Heat stress inhibited yield traits (seed number and seed weight per plant) more than drought stress, while drought stress reduced individual seed weights more than heat stress. The combined stress severely inhibited yield traits with less effect on the drought- and heat-tolerant genotypes. Drought stress inhibited the biochemical processes of seed filling more than heat stress, and the combined stress had a highly detrimental effect. A partial cross tolerance was noticed in drought and heat-tolerant lentil genotypes against the two stresses.
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Claims 17
Claim · model-written summary
Heat damaged membranes, photosynthetic traits and water relations.
- Taxon
- Lentil
Lens culinarist0 - Treatment
- heate0
- Outcome
- cell membranes, photosynthetic traits and water relationse0
- Direction
- damagede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both heat and drought, individually or in combination, damaged cell membranes, photosynthetic traits and water relations; the effects were more severe with the combined stress.”
t0“Lentil”
Claim · model-written summary
Drought damaged membranes, photosynthetic traits and water relations.
- Taxon
- LentilLens culinarist0
- Treatment
- droughte0
- Outcome
- cell membranes, photosynthetic traits and water relationse0
- Direction
- damagede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both heat and drought, individually or in combination, damaged cell membranes, photosynthetic traits and water relations; the effects were more severe with the combined stress.”
t0“Lentil”
Claim · model-written summary
Combined heat and drought caused more severe damage.
- Taxon
- LentilLens culinarist0
- Treatment
- combined stresse0
- Outcome
- effectse0
- Direction
- more severee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects were more severe with the combined stress.”
t0“Lentil”
Claim · model-written summary
Heat increased RuBisCo and stomatal conductance.
- Taxon
- LentilLens culinarist0
- Treatment
- heat stresse0
- Outcome
- RuBisCo and stomatal conductancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RuBisCo and stomatal conductance increased with heat stress but decreased with drought and the combined stress.”
t0“Lentil”
Claim · model-written summary
Drought decreased RuBisCo and stomatal conductance.
- Taxon
- LentilLens culinarist0
- Treatment
- droughte0
- Outcome
- RuBisCo and stomatal conductancee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RuBisCo and stomatal conductance increased with heat stress but decreased with drought and the combined stress.”
t0“Lentil”
Claim · model-written summary
Combined heat and drought decreased RuBisCo and stomatal conductance.
- Taxon
- LentilLens culinarist0
- Treatment
- combined stresse0
- Outcome
- RuBisCo and stomatal conductancee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RuBisCo and stomatal conductance increased with heat stress but decreased with drought and the combined stress.”
t0“Lentil”
Claim · model-written summary
Each stress decreased leaf and seed sucrose and its biosynthetic enzyme.
- Taxon
- LentilLens culinarist0
- Treatment
- each stresse0
- Outcome
- Leaf and seed sucrosee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf and seed sucrose decreased with each stress in conjunction with its biosynthetic enzyme”
t0“Lentil”
Claim · model-written summary
Heat and drought increased sucrose hydrolysis.
- Taxon
- LentilLens culinarist0
- Treatment
- heat and drought stresse0
- Outcome
- hydrolysise0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its (sucrose) hydrolysis increased under heat and drought stress”
t0“Lentil”
Claim · model-written summary
Combined stresses inhibited sucrose hydrolysis.
- Taxon
- LentilLens culinarist0
- Treatment
- combination of stressese0
- Outcome
- hydrolysise0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its (sucrose) hydrolysis increased under heat and drought stress, but was inhibited due to combination of stresses.”
t0“Lentil”
Claim · model-written summary
Heat increased leaf starch.
- Taxon
- LentilLens culinarist0
- Treatment
- heat stresse0
- Outcome
- Starche0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch increased under heat stress in leaves”
t0“Lentil”
Claim · model-written summary
Heat decreased seed starch.
- Taxon
- LentilLens culinarist0
- Treatment
- heat stresse0
- Outcome
- Starche0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch increased under heat stress in leaves but decreased in seeds”
t0“Lentil”
Claim · model-written summary
Drought or combined stress drastically reduced seed starch.
- Taxon
- LentilLens culinarist0
- Treatment
- drought alone or in combination with heat stresse0
- Outcome
- Starche0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch increased under heat stress in leaves but decreased in seeds, but drastically declined in seeds under drought alone or in combination with heat stress.”
t0“Lentil”
Claim · model-written summary
Starch hydrolysis increased in leaves and seeds with reducing-sugar accumulation.
- Taxon
- LentilLens culinarist0
- Outcome
- starch hydrolysise0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starch hydrolysis in leaves and seeds increased resulting in an accumulation of reducing sugars.”
t0“Lentil”
Claim · model-written summary
Heat suppressed seed number and seed weight per plant more than drought.
- Taxon
- LentilLens culinarist0
- Treatment
- Heat stresse0
- Outcome
- seed number and seed weight per plante0
- Direction
- inhibitede0
- Comparator
- drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat stress inhibited yield traits (seed number and seed weight per plant) more than drought stress”
t0“Lentil”
Claim · model-written summary
Drought reduced individual seed weight more than heat.
- Taxon
- LentilLens culinarist0
- Treatment
- drought stresse0
- Outcome
- individual seed weightse0
- Direction
- reducede0
- Comparator
- heat stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress reduced individual seed weights more than heat stress.”
t0“Lentil”
Claim · model-written summary
Combined stress severely inhibited yield traits, with less impact on tolerant genotypes.
- Taxon
- LentilLens culinarist0
- Treatment
- combined stresse0
- Outcome
- yield traitse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined stress severely inhibited yield traits with less effect on the drought- and heat-tolerant genotypes.”
t0“Lentil”
Claim · model-written summary
Drought and heat tolerant lentil genotypes showed partial cross tolerance.
- Taxon
- LentilLens culinarist0
- Outcome
- partial cross tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A partial cross tolerance was noticed in drought and heat-tolerant lentil genotypes against the two stresses.”
t0“Lentil”
The same questions in other papers
drought · physiology: photosynthesis · Lens culinaris (lentil)Positive and negative results
1 in the opposite direction
- negative
heat · physiology: photosynthesis · Lens culinaris (lentil)Positive and negative results
1 in the opposite direction
- negative
heat · quality: sugar starch · Lens culinaris (lentil)Positive and negative results
2 in the opposite direction
- negative
- negative
heat · yield · Lens culinaris (lentil)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
6 papers more in this group
See all 10 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.