Abstract
Drought stress affects yield of indeterminate species, but the effects on yield components, seed number, and individual seed weight at harvest are, in some cases, contradictory. The diversity of effects can result from the complex sequential development of these plants with respect to timing of drought. Two experiments were carried out in a glasshouse to study the effect of short‐term drought (about 6 d) during different periods of reproductive development on the phenology of pea ( Pisum sativum L.) cv Solara, and on seed abortion and seed growth rate at each nodal location on the stem. An additional experiment was carried out in the field. Short‐term stresses did not change development except for the progression of flowering along the stem which was stopped prematurely. The duration of the lag‐phase between flowering and initiation of seed filling, and the duration of seed filling, were not affected at any nodal position. Analysis of the distribution of seeds along the stem suggested that the final stage at which seed abortion occurred corresponded approximately to the initiation of linear seed filling. Seeds that reached this stage before the stress was imposed never aborted and their growth was maintained. Seed abortion in lag‐phase was dependent on the intensity of drought. If the stress was imposed when all the seeds were filling, no abortion occurred and seed growth rates were maintained by mobilization of plant reserves. The results suggest that the plant responded to drought by reducing seed number when possible or mobilizing its reserves to maintain a constant seed growth rate.
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Claims 8
Claim · model-written summary
Short term drought prematurely stopped flowering progression along the pea stem.
- Taxon
- pea
Lathyrus oleraceuse1 - Treatment
- Short‐term stressese0
- Outcome
- progression of flowering along the steme0
- Direction
- stopped prematurelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short‐term stresses did not change development except for the progression of flowering along the stem which was stopped prematurely”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Drought did not alter lag phase or seed filling duration at any node.
- Taxon
- peaLathyrus oleraceuse2
- Treatment
- short‐term droughte1
- Outcome
- duration of the lag‐phase between flowering and initiation of seed filling, and the duration of seed fillinge0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The duration of the lag‐phase between flowering and initiation of seed filling, and the duration of seed filling, were not affected at any nodal position”
e1“short‐term drought (about 6 d)”
e2“pea ( Pisum sativum L.)”
Claim · model-written summary
The last seed abortion stage approximately coincided with initiation of linear filling.
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- final stage at which seed abortion occurrede0
- Qualifier
- approximately to the initiation of linear seed fillinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the final stage at which seed abortion occurred corresponded approximately to the initiation of linear seed filling”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Seeds entering linear filling before drought did not abort.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- stresse0
- Outcome
- Seeds that reached this stage before the stress was imposed never abortede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds that reached this stage before the stress was imposed never aborted”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Growth of seeds entering linear filling before drought was maintained.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- stresse0
- Outcome
- their growthe0
- Direction
- maintainede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds that reached this stage before the stress was imposed never aborted and their growth was maintained”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Seed abortion during lag phase depended on drought intensity.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- intensity of droughte0
- Outcome
- Seed abortion in lag‐phasee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed abortion in lag‐phase was dependent on the intensity of drought”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
When drought began after all seeds entered filling, abortion did not occur.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- stresse0
- Outcome
- no abortion occurrede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If the stress was imposed when all the seeds were filling, no abortion occurred”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Seed growth rates were maintained by mobilized reserves during late drought.
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- seed growth ratese0
- Direction
- maintainede0
- Qualifier
- mobilization of plant reservese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed growth rates were maintained by mobilization of plant reserves”
e1“pea ( Pisum sativum L.)”
The same questions in other papers
drought · yield · Lathyrus oleraceus (pea)Results differ
16 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- positive
20 papers more in this group
See all 24 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.