Abstract
Abrupt drought-flood alternation (T1) is a meteorological disaster that frequently occurs during summer in southern China and the Yangtze river basin, often causing a significant loss of rice production. In this study, the response mechanism of yield decline under abrupt drought-flood alternation stress at the panicle differentiation stage was analyzed by looking at the metabolome, proteome as well as yield and physiological and biochemical indexes. The results showed that drought and flood stress caused a decrease in the yield of rice at the panicle differentiation stage, and abrupt drought-flood alternation stress created a synergistic effect for the reduction of yield. The main reason for the decrease of yield per plant under abrupt drought-flood alternation was the decrease of seed setting rate. Compared with CK0 (no drought and no flood), the net photosynthetic rate and soluble sugar content of T1 decreased significantly and its hydrogen peroxidase, superoxide dismutase, peroxidase activity increased significantly. The identified differential metabolites and differentially expressed proteins indicated that photosynthesis metabolism, energy metabolism pathway and reactive oxygen species response have changed strongly under abrupt drought-flood alteration stress, which are factors that leads to the rice grain yield reduction.
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Claims 10
Claim · model-written summary
Drought stress reduced rice yield at panicle differentiation.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- panicle differentiation stagee0
- Treatment
- droughte0
- Outcome
- yield of ricee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought and flood stress caused a decrease in the yield of rice at the panicle differentiation stage”
Claim · model-written summary
Flood stress reduced rice yield at panicle differentiation.
- Taxon
- riceOryza sativae0
- Organ / stage
- panicle differentiation stagee0
- Treatment
- floode0
- Outcome
- yield of ricee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought and flood stress caused a decrease in the yield of rice at the panicle differentiation stage”
Claim · model-written summary
Abrupt alternation synergistically reduced rice yield.
- Taxon
- riceOryza sativat0
- Treatment
- abrupt drought-flood alternation stresse0
- Outcome
- yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“abrupt drought-flood alternation stress created a synergistic effect for the reduction of yield.”
t0“rice”
Claim · model-written summary
Reduced seed setting rate was identified as the main reason for yield loss.
- Taxon
- riceOryza sativat0
- Organ / stage
- seed setting ratee0
- Treatment
- abrupt drought-flood alternatione0
- Outcome
- yield per plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main reason for the decrease of yield per plant under abrupt drought-flood alternation was the decrease of seed setting rate.”
t0“rice”
Claim · model-written summary
T1 significantly reduced net photosynthetic rate versus CK0.
- Taxon
- riceOryza sativat0
- Treatment
- T1e0
- Outcome
- net photosynthetic ratee0
- Direction
- decreasede0
- Comparator
- CK0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK0 (no drought and no flood), the net photosynthetic rate and soluble sugar content of T1 decreased significantly”
t0“rice”
Claim · model-written summary
T1 significantly reduced soluble sugar content versus CK0.
- Taxon
- riceOryza sativat0
- Treatment
- T1e0
- Outcome
- soluble sugar contente0
- Direction
- decreasede0
- Comparator
- CK0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK0 (no drought and no flood), the net photosynthetic rate and soluble sugar content of T1 decreased significantly”
t0“rice”
Claim · model-written summary
T1 significantly increased hydrogen peroxidase activity.
- Taxon
- riceOryza sativat0
- Treatment
- abrupt drought–flood alternation stresst0
- Outcome
- hydrogen peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its hydrogen peroxidase, superoxide dismutase, peroxidase activity increased significantly.”
t0“rice under abrupt drought–flood alternation stress”
Claim · model-written summary
T1 significantly increased superoxide dismutase activity.
- Taxon
- riceOryza sativat0
- Treatment
- abrupt drought–flood alternation stresst0
- Outcome
- superoxide dismutasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its hydrogen peroxidase, superoxide dismutase, peroxidase activity increased significantly.”
t0“rice under abrupt drought–flood alternation stress”
Claim · model-written summary
T1 significantly increased peroxidase activity.
- Taxon
- riceOryza sativat0
- Treatment
- abrupt drought–flood alternation stresst0
- Outcome
- peroxidase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its hydrogen peroxidase, superoxide dismutase, peroxidase activity increased significantly.”
t0“rice under abrupt drought–flood alternation stress”
Claim · model-written summary
Differential metabolites and proteins indicated changes in photosynthesis metabolism, energy metabolism and reactive oxygen response.
- Taxon
- riceOryza sativat0
- Treatment
- abrupt drought-flood alteration stresse0
- Outcome
- photosynthesis metabolism, energy metabolism pathway and reactive oxygen species responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The identified differential metabolites and differentially expressed proteins indicated that photosynthesis metabolism, energy metabolism pathway and reactive oxygen species response have changed strongly under abrupt drought-flood alteration stress”
t0“rice”
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See all 325 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.