Abstract
Decrease in the grain yield resulted from a low percentage of opened spikelets under high temperature (HT) during anthesis is a serious problem in the seed production of photo-thermo-sensitive genic male sterile (PTGMS) rice (Oryza sativa L.) lines, and the mechanism is little understood. Elucidating the physiological mechanism underlying the effect of HT during anthesis on spikelet-opening of PTGMS lines would have great significance in exploring the effective way to mitigate the adverse effect of HT. In this study, two PTGMS lines and one restorer line of rice were used and were subjected to normal temperature (NT) and HT treatments. The results showed that, compared with NT, HT significantly decreased the percentage of opened spikelets, fertilization percentage and seed-setting by significantly increasing the percentage of wrapped spikelets and reducing the spikelet-opening angle, length of spikelet-opening time. The HT significantly decreased the contents of soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA) in the lodicules before and at glume-opening, which were significantly correlated with and accounts for the low percentage of opened spikelets under HT for rice, especially for the PTGMS lines.
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Claims 6
Claim · model-written summary
Compared with normal temperature, high temperature significantly decreased the percentage of opened spikelets, fertilization percentage and seed-setting.
- Taxon
- rice
Oryza sativae0 - Material
- PTGMS linese0
- Treatment
- HTe1
- Outcome
- percentage of opened spikelets, fertilization percentage and seed-settinge1
- Direction
- decreasede1
- Comparator
- NTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two PTGMS lines and one restorer line of rice”
e1“compared with NT, HT significantly decreased the percentage of opened spikelets, fertilization percentage and seed-setting”
Claim · model-written summary
High temperature significantly increased the percentage of wrapped spikelets compared with normal temperature.
- Taxon
- riceOryza sativae0
- Material
- PTGMS linese0
- Treatment
- HTe1
- Outcome
- percentage of wrapped spikeletse1
- Direction
- increasinge1
- Comparator
- NTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two PTGMS lines and one restorer line of rice”
e1“compared with NT, HT significantly decreased the percentage of opened spikelets, fertilization percentage and seed-setting by significantly increasing the percentage of wrapped spikelets and reducing the spikelet-opening angle, length of spikelet-opening time”
Claim · model-written summary
High temperature reduced the spikelet-opening angle and the length of spikelet-opening time compared with normal temperature.
- Taxon
- riceOryza sativae0
- Material
- PTGMS linese0
- Treatment
- HTe1
- Outcome
- spikelet-opening angle, length of spikelet-opening timee1
- Direction
- reducinge1
- Comparator
- NTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two PTGMS lines and one restorer line of rice”
e1“compared with NT, HT significantly decreased the percentage of opened spikelets, fertilization percentage and seed-setting by significantly increasing the percentage of wrapped spikelets and reducing the spikelet-opening angle, length of spikelet-opening time”
Claim · model-written summary
High temperature significantly decreased the contents of soluble sugars, jasmonic acid and methyl jasmonate in the lodicules before and at glume-opening.
- Taxon
- riceOryza sativae0
- Organ / stage
- lodiculese1
- Treatment
- HTe1
- Outcome
- contents of soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA)e1
- Direction
- decreasede1
- Qualifier
- before and at glume-openinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two PTGMS lines and one restorer line of rice”
e1“The HT significantly decreased the contents of soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA) in the lodicules before and at glume-opening”
Claim · model-written summary
Lodicule soluble sugar, JA and MeJA contents were significantly correlated with the low percentage of opened spikelets under high temperature.
- Taxon
- riceOryza sativae0
- Organ / stage
- lodiculese1
- Compound
- soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA)e1
- Outcome
- low percentage of opened spikeletse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two PTGMS lines and one restorer line of rice”
e1“The HT significantly decreased the contents of soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA) in the lodicules before and at glume-opening, which were significantly correlated with and accounts for the low percentage of opened spikelets under HT for rice, especially for the PTGMS lines”
Claim · model-written summary
The reduced lodicule soluble sugar, JA and MeJA contents account for the low percentage of opened spikelets under high temperature, especially in PTGMS lines.
- Taxon
- riceOryza sativae0
- Material
- PTGMS linese1
- Organ / stage
- lodiculese1
- Treatment
- HTe1
- Compound
- soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA)e1
- Outcome
- low percentage of opened spikeletse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two PTGMS lines and one restorer line of rice”
e1“The HT significantly decreased the contents of soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA) in the lodicules before and at glume-opening, which were significantly correlated with and accounts for the low percentage of opened spikelets under HT for rice, especially for the PTGMS lines”
The same questions in other papers
heat · physiology: osmolytes · Oryza sativa (rice)Results differ
8 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
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