Abstract
Rice yield is highly sensitive to increased temperature. Given the trend of increasing global temperatures, this sensitivity to higher temperatures poses a challenge for achieving global food security. Early seed development in rice is highly sensitive to unfavorable environmental conditions. Heat stress (HS) during this stage decreases seed size and fertility, thus reducing yield. Here, we explore the transgenerational phenotypic consequences of HS during early seed development on seed viability, germination, and establishment. To elucidate the impact of HS on the developmental events in post-zygotic rice seeds, we imposed moderate (35°C) and severe (39°C) HS treatments initiated 1 day after fertilization and maintained for 24, 48, or 72 h. The transient HS treatments altered the initiation of endosperm (ED) cellularization, seed size and/or the duration of spikelet ripening. Notably, seeds exposed to 24 and 48 h moderate HS exhibited higher germination rate compared to seeds derived from plants grown under control or severe HS. A short-term HS resulted in altered expression of Gibberellin (GA) and ABA biosynthesis genes during early seed development, and GA and ABA levels and starch content at maturity. The increased germination rate after 24 of moderate HS could be due to altered ABA sensitivity and/or increased starch level. Our findings on the impact of transient HS on hormone homeostasis provide an experimental framework to elucidate the underlying molecular and metabolic pathways.
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Claims 5
Claim · model-written summary
Transient heat stress altered rice endosperm cellularization initiation.
- Taxon
- rice
Oryza sativat0 - Treatment
- transient HS treatmentse0
- Outcome
- initiation of endosperm (ED) cellularizatione0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transient HS treatments altered the initiation of endosperm (ED) cellularization, seed size and/or the duration of spikelet ripening.”
t0“Rice”
Claim · model-written summary
Transient heat stress altered rice seed size and/or spikelet ripening duration.
- Taxon
- riceOryza sativat0
- Treatment
- transient HS treatmentse0
- Outcome
- seed size and/or the duration of spikelet ripeninge0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transient HS treatments altered the initiation of endosperm (ED) cellularization, seed size and/or the duration of spikelet ripening.”
t0“Rice”
Claim · model-written summary
Seeds exposed to 24 or 48 hours of moderate heat stress germinated more than controls or severe heat stress seeds.
- Taxon
- riceOryza sativat0
- Treatment
- 24 and 48 h moderate HSe0
- Outcome
- germination ratee0
- Direction
- highere0
- Comparator
- control or severe HSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seeds exposed to 24 and 48 h moderate HS exhibited higher germination rate compared to seeds derived from plants grown under control or severe HS.”
t0“Rice”
Claim · model-written summary
Short term heat stress altered GA and ABA biosynthesis gene expression during early seed development.
- Taxon
- riceOryza sativat0
- Treatment
- short-term HSe0
- Outcome
- expression of Gibberellin (GA) and ABA biosynthesis genese0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A short-term HS resulted in altered expression of Gibberellin (GA) and ABA biosynthesis genes during early seed development, and GA and ABA levels and starch content at maturity.”
t0“Rice”
Claim · model-written summary
Short term heat stress altered GA and ABA levels and mature seed starch content.
- Taxon
- riceOryza sativat0
- Treatment
- short-term HSe0
- Outcome
- GA and ABA levels and starch content at maturitye0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A short-term HS resulted in altered expression of Gibberellin (GA) and ABA biosynthesis genes during early seed development, and GA and ABA levels and starch content at maturity.”
t0“Rice”
The same questions in other papers
heat · growth · Oryza sativa (rice)Positive and negative results
45 papers in the same direction as this paper · 60 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- positive
103 papers more in this group
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