Abstract
Gametogenesis in rice (Oryza sativa L.), and particularly male gametogenesis, is a critical developmental stage affected by different abiotic stresses. Research on this stage is limited, as flowering stage has been the major focus for research to date. Our main objective was to identify a phenotypic marker for male gametogenesis and the duration of exposure needed to quantify the impact of heat stress at this stage. Spikelet size coinciding with microsporogenesis was identified using parafilm sectioning, and the panicle (spikelet) growth rate was established. The environmental stability of the marker was ascertained with different nitrogen (75 and 125kg ha-1) and night temperature (22°C and 28°C) combinations under field conditions. A distance of -8 to -9cm between the collar of the last fully opened leaf and the flag leaf collar, which was yet to emerge was identified as the environmentally stable phenotypic marker. Heat stress (38°C) imposed using the identified marker induced 8-63% spikelet sterility across seven genetically diverse rice genotypes. Identifying the right stage based on the marker information and imposing 6 consecutive days of heat stress ensures that >95% of the spikelets in a panicle are stressed spanning across the entire microsporogenesis stage.
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Claims 3
Claim · model-written summary
A -8 to -9cm collar distance was identified as a stable marker for microsporogenesis.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- flag leaf collare0
- Outcome
- environmentally stable phenotypic markere0
- Value
- -8 to -9cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A distance of -8 to -9cm between the collar of the last fully opened leaf and the flag leaf collar, which was yet to emerge was identified as the environmentally stable phenotypic marker.”
t0“rice”
Claim · model-written summary
Heat stress at 38°C induced 8-63% spikelet sterility across seven rice genotypes.
- Taxon
- riceOryza sativae0
- Material
- seven genetically diverse rice genotypese0
- Treatment
- Heat stress (38°C)e0
- Outcome
- spikelet sterilitye0
- Direction
- inducede0
- Value
- 8-63%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat stress (38°C) imposed using the identified marker induced 8-63% spikelet sterility across seven genetically diverse rice genotypes.”
Claim · model-written summary
Six consecutive heat-stress days based on the marker stressed over 95% of spikelets through microsporogenesis.
- Taxon
- riceOryza sativat0
- Organ / stage
- microsporogenesis stagee0
- Treatment
- 6 consecutive days of heat stresse0
- Outcome
- spikelets in a panicle are stressede0
- Value
- >95%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Identifying the right stage based on the marker information and imposing 6 consecutive days of heat stress ensures that >95% of the spikelets in a panicle are stressed spanning across the entire microsporogenesis stage.”
t0“rice”
The same questions in other papers
heat · yield · Oryza sativa (rice)Positive and negative results
158 papers in the same direction as this paper · 36 in the opposite direction
- negative
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See all 195 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.