Abstract
Wheat breeding has improved yield potential increasing floret survival through higher dry matter partitioning to the spikes during the stem elongation phase (from terminal spikelet initiation to anthesis). We studied survival of floret primodia in different spikelet positions along the spike in relation to dynamics of spike growth, when dynamics of dry matter partitioning to the spike was altered by photoperiod and shading treatments applied during the stem elongation phase. The cultivar Buck Manantial was exposed to (1) NP+0 un-shaded (natural photoperiod and incoming radiation of the growing season), (2) NP+0 shaded (natural photoperiod but only 33% of the incoming radiation), and (3) NP+6 un-shaded (natural photoperiod extended 6 h and natural incoming radiation). Floret survival increased, depending on spikelet position, 1.1–2.5 fold under un-shaded v. shaded treatments (both under NP+0), and 1.3–1.8 fold under NP+0 v. NP+6 treatments (both un-shaded), without any impact of treatments on the total number of initiated floret primordia. The fate of the floret primordia and its final stage at anthesis were associated with duration of floret development within the stem elongation phase (R2 = 82%, P<0.0001). Florets may be classified into three groups: (i) those that were fertile at anthesis under all treatments (mostly the two florets F1 and F2, proximal to the rachis within the spikelet), (ii) those that reached different stages at anthesis, depending on treatment, and that contributed differentially to the number of fertile florets at anthesis (mostly the florets F3, F4 and F5, positioned in the middle of the spikelet), and (iii) those that did not contribute to the number of fertile florets under any treatment (mostly the florets = F6). Degeneration of florets in group (ii) was associated with spike growth at maximum rate, explaining the strong relationship observed between spike dry weight at anthesis and number of fertile florets. However, degeneration of florets in group (iii) seemed to occur before spike growth at maximum rate. Survival of florets positioned in the middle of the spikelets could be improved by increasing spike growth through manipulation of photoperiod sensitivity during stem elongation.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Unshaded wheat had 1.1–2.5-fold greater floret survival than shaded wheat.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- un-shadede0
- Outcome
- Floret survivale0
- Direction
- increasede0
- Value
- 1.1–2.5 folde0
- Comparator
- shadede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Floret survival increased, depending on spikelet position, 1.1–2.5 fold under un-shaded v. shaded treatments (both under NP+0)”
t0“wheat plants”
Claim · model-written summary
Natural photoperiod gave 1.3–1.8-fold greater floret survival than extended photoperiod.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- NP+0e0
- Outcome
- Floret survivale1
- Direction
- increasede1
- Value
- 1.3–1.8 folde0
- Comparator
- NP+6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1.3–1.8 fold under NP+0 v. NP+6 treatments (both un-shaded)”
e1“Floret survival increased”
t0“wheat plants”
Claim · model-written summary
Treatments did not affect the number of initiated floret primordia.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- treatmentse0
- Outcome
- total number of initiated floret primordiae0
- Direction
- without any impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without any impact of treatments on the total number of initiated floret primordia”
t0“wheat plants”
Claim · model-written summary
Final floret fate and stage at anthesis were associated with development duration during stem elongation.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- stem elongation phasee0
- Outcome
- fate of the floret primordia and its final stage at anthesise0
- Value
- 82%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fate of the floret primordia and its final stage at anthesis were associated with duration of floret development within the stem elongation phase (R2 = 82%, P<0.0001)”
t0“wheat plants”
Claim · model-written summary
F1 and F2 florets were fertile at anthesis under all treatments.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- florets F1 and F2e0
- Outcome
- fertile at anthesis under all treatmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those that were fertile at anthesis under all treatments (mostly the two florets F1 and F2, proximal to the rachis within the spikelet)”
t0“wheat plants”
Claim · model-written summary
Middle-position F3–F5 florets reached different anthesis stages by treatment and contributed differentially to fertile-floret number.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- florets F3, F4 and F5e0
- Outcome
- different stages at anthesise0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those that reached different stages at anthesis, depending on treatment, and that contributed differentially to the number of fertile florets at anthesis (mostly the florets F3, F4 and F5, positioned in the middle of the spikelet)”
t0“wheat plants”
Claim · model-written summary
F6 florets did not contribute fertile florets under any treatment.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- florets = F6e0
- Outcome
- did not contribute to the number of fertile florets under any treatmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those that did not contribute to the number of fertile florets under any treatment (mostly the florets = F6)”
t0“wheat plants”
Claim · model-written summary
F3–F5 degeneration coincided with maximum spike growth.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- florets in group (ii)e0
- Outcome
- Degeneratione0
- Qualifier
- spike growth at maximum ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Degeneration of florets in group (ii) was associated with spike growth at maximum rate”
t0“wheat plants”
Claim · model-written summary
Spike dry weight at anthesis was strongly related to fertile-floret number.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- spikee0
- Outcome
- number of fertile floretse0
- Qualifier
- spike dry weight at anthesise0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strong relationship observed between spike dry weight at anthesis and number of fertile florets”
t0“wheat plants”
Claim · model-written summary
F6 degeneration appeared to precede maximum spike growth.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- degeneration of florets in group (iii)e0
- Qualifier
- before spike growth at maximum ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“degeneration of florets in group (iii) seemed to occur before spike growth at maximum rate”
t0“wheat plants”
Claim · model-written summary
The authors propose increasing spike growth through photoperiod sensitivity to improve middle-floret survival.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- increasing spike growth through manipulation of photoperiod sensitivity during stem elongatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Survival of florets positioned in the middle of the spikelets could be improved by increasing spike growth through manipulation of photoperiod sensitivity during stem elongation”
t0“wheat plants”
The same questions in other papers
nanoparticle · survival · Triticum aestivum (wheat)Results agree
1 paper in the same direction as this paper
- positive
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.