Abstract
This experiment was conducted to compare the tolerant responses between two soybean cultivars Sowonkong (tolerant) and Hannamkong (sensitive) when these were subjected to flooding stress. Plants were grown under photoperiod of natural light with day temperature of 30.6±5.3℃ and night temperature of 22.2±1.7℃. Flooding, filled with tap water to 1 cm above the level of the soil surface, was experimented for nine days when plants were at the vegetative (V4 to V5) and reproductive (R2; flowering) stage. The photosynthesis and transpiration of soybean with flooding declined progressively in comparison with the non-flooding at V4 to V5 and R2 stage. The Fv/Fm ratio and chlorophyll content also showed a constant decrease by the progressive flood stress. The photosynthesis, transpiration, Fv/Fm ratio and chlorophyll content were more affected by the flooding in Hannamkong than in Sowonkong. The NH_4 content increased up to five days after flooding but thereafter, rapidly decreased at both stages except for Sowonkong flooded at V4 to V5 stage. The NO_3 content was not greatly changed in soybean leaf but there was a great reduction of NO_3 in root by the flood stress. The growth characteristics of flooded plants also were reduced compared to the non-flooded plant at both stages. The seed yield, pod number and seed weight significantly reduced when the flood stress was applied at V4 to V5 and R2 stage. Specially, the yield reduction was more sensitive at R2 than V4 toV5 stage in Hannamkong. Furthermore, in this paper, the relationship between photosynthetic parameters and yield will be discussed.
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Claims 9
Claim · model-written summary
Flooding progressively reduced soybean photosynthesis and transpiration at vegetative and reproductive stages.
- Taxon
- Soybean
Glycine maxt0 - Organ / stage
- V4 to V5 and R2 stagee0
- Treatment
- floodinge0
- Outcome
- photosynthesis and transpiratione0
- Direction
- declined progressivelye0
- Comparator
- non-floodinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthesis and transpiration of soybean with flooding declined progressively in comparison with the non-flooding at V4 to V5 and R2 stage.”
t0“Soybean”
Claim · model-written summary
Progressive flooding decreased the Fv/Fm ratio and chlorophyll content.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Floodinge1
- Outcome
- Fv/Fm ratio and chlorophyll contente0
- Direction
- constant decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Fv/Fm ratio and chlorophyll content also showed a constant decrease by the progressive flood stress.”
t0“Soybean”
e1“Flooding, filled with tap water to 1 cm above the level of the soil surface, was experimented for nine days”
Claim · model-written summary
Flooding affected photosynthesis, transpiration, Fv/Fm ratio and chlorophyll more in Hannamkong than Sowonkong.
- Taxon
- SoybeanGlycine maxt0
- Material
- Hannamkonge0
- Treatment
- floodinge0
- Outcome
- photosynthesis, transpiration, Fv/Fm ratio and chlorophyll contente0
- Direction
- more affectede0
- Comparator
- Sowonkonge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthesis, transpiration, Fv/Fm ratio and chlorophyll content were more affected by the flooding in Hannamkong than in Sowonkong.”
t0“Soybean”
Claim · model-written summary
Leaf NH_4 content rose for five days after flooding and then rapidly fell at both stages, except in Sowonkong flooded at V4 to V5.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- floodinge0
- Outcome
- NH_4 contente0
- Direction
- increasede0
- Qualifier
- except for Sowonkong flooded at V4 to V5 stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NH_4 content increased up to five days after flooding but thereafter, rapidly decreased at both stages except for Sowonkong flooded at V4 to V5 stage.”
t0“Soybean”
Claim · model-written summary
Leaf NO_3 content changed little under flooding.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- leafe0
- Treatment
- flood stresse0
- Outcome
- NO_3 contente0
- Direction
- not greatly changede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NO_3 content was not greatly changed in soybean leaf but there was a great reduction of NO_3 in root by the flood stress.”
Claim · model-written summary
Flooding greatly reduced root NO_3 content.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- roote0
- Treatment
- flood stresse0
- Outcome
- NO_3e0
- Direction
- great reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NO_3 content was not greatly changed in soybean leaf but there was a great reduction of NO_3 in root by the flood stress.”
Claim · model-written summary
Flooding reduced plant growth characteristics at both stages.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Floodinge1
- Outcome
- growth characteristicse0
- Direction
- reducede0
- Comparator
- non-flooded plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth characteristics of flooded plants also were reduced compared to the non-flooded plant at both stages.”
t0“Soybean”
e1“Flooding, filled with tap water to 1 cm above the level of the soil surface, was experimented for nine days”
Claim · model-written summary
Flooding significantly reduced seed yield, pod number and seed weight at V4 to V5 and R2 stages.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- V4 to V5 and R2 stagee0
- Treatment
- Floodinge1
- Outcome
- seed yield, pod number and seed weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed yield, pod number and seed weight significantly reduced when the flood stress was applied at V4 to V5 and R2 stage.”
t0“Soybean”
e1“Flooding, filled with tap water to 1 cm above the level of the soil surface, was experimented for nine days”
Claim · model-written summary
Yield reduction under flooding was greater at R2 than V4 to V5 in Hannamkong.
- Taxon
- SoybeanGlycine maxt0
- Material
- Hannamkonge0
- Organ / stage
- R2e0
- Treatment
- Floodinge1
- Outcome
- yield reductione0
- Direction
- more sensitivee0
- Comparator
- V4 toV5 stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Specially, the yield reduction was more sensitive at R2 than V4 toV5 stage in Hannamkong.”
t0“Soybean”
e1“Flooding, filled with tap water to 1 cm above the level of the soil surface, was experimented for nine days”
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See all 13 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.