Abstract
Abstract Infection of soybean [ Glycine max (L.) Merr.] by Phomopsis longicolla Hobbs is associated with physiological changes that occur during senescence. The purpose of this research was to determine the relationship of carbohydrate and mineral nutrient composition of pod tissue to seed infection by P. longicolla during senescence and maturity. Soybean pod nutrient levels were altered by N deficiency and water stress by growing nodulating and non‐nodulating isolines of soybean on a Typic Fragiudalf soil at high and low soil moisture (approximately 100 and 1500 kPa tension, respectively) and with high and low N (75 kg ha −1 and 0 kg ha −1 , respectively). Nitrogen fertilizer‐isoline treatments affected plant growth and yield but not seed infection by P. longicolla or seed quality. Physiological maturity occurred 1 to 2 weeks earlier in plants grown under low compared to high soil moisture. Seed produced under low soil moisture exhibited less infection by P. longicolla (18 vs. 58% maximum) and greater germinability (66 vs. 47% minimum) than seed from high moisture soil. Total nonstructural carbohydrates (TNC), N, and P were greater in pod walls from plants grown on high compared to low moisture soil. A lower incidence of P. longicolla in upper nodes (3–32%) compared to lower nodes (13–58%) of plants was associated with higher germination levels, lower K, and greater Ca and TNC levels in pod walls. Decreases in seed germination of 14%, 20 weeks after harvest maturity in 1981, and 7%, 8 weeks after harvest maturity in 1982, were only associated with increased seed infection by P. longicolla (10–15%) in 1982. This difference in P. longicolla between years due to harvest delay was associated with higher levels of TNC in pod walls from high soil moisture treatments in 1982 (86–145 vs. 55–58 g kg −1 dry weight). Reducing seed infection by P. longicolla might be achieved by preventing pod wall accumulation of TNC, N, and P, increasing pod wall accumulation of Ca, and shortening the time from physiological maturity to harvest maturity.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 15
Claim · model-written summary
Nitrogen fertilizer-isoline treatments affected soybean plant growth and yield.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- Nitrogen fertilizer‐isoline treatmentse0
- Outcome
- plant growth and yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Nitrogen fertilizer‐isoline treatments affected plant growth and yield”
Claim · model-written summary
Nitrogen fertilizer-isoline treatments did not affect seed infection by P. longicolla in soybean.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Nitrogen fertilizer‐isoline treatmentse0
- Interactor
- P. longicollae0pathogen
- Outcome
- seed infection by P. longicollae0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Nitrogen fertilizer‐isoline treatments affected plant growth and yield but not seed infection by P. longicolla or seed quality”
Claim · model-written summary
Nitrogen fertilizer-isoline treatments did not affect soybean seed quality.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Nitrogen fertilizer‐isoline treatmentse0
- Outcome
- seed qualitye0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Nitrogen fertilizer‐isoline treatments affected plant growth and yield but not seed infection by P. longicolla or seed quality”
Claim · model-written summary
Physiological maturity of soybean occurred 1 to 2 weeks earlier under low than under high soil moisture.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- lowe0
- Outcome
- Physiological maturitye0
- Direction
- earliere0
- Value
- 1 to 2 weekse0
- Comparator
- high soil moisturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Physiological maturity occurred 1 to 2 weeks earlier in plants grown under low compared to high soil moisture”
Claim · model-written summary
Soybean seed produced under low soil moisture showed less infection by P. longicolla (18 vs. 58% maximum) than seed from high moisture soil.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- low soil moisturee0
- Interactor
- P. longicollae0pathogen
- Outcome
- infection by P. longicollae0
- Direction
- lesse0
- Value
- 18 vs. 58% maximume0
- Comparator
- high moisture soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Seed produced under low soil moisture exhibited less infection by P. longicolla (18 vs. 58% maximum) and greater germinability (66 vs. 47% minimum) than seed from high moisture soil”
Claim · model-written summary
Soybean seed produced under low soil moisture had greater germinability (66 vs. 47% minimum) than seed from high moisture soil.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- low soil moisturee0
- Outcome
- germinabilitye0
- Direction
- greatere0
- Value
- 66 vs. 47% minimume0
- Comparator
- high moisture soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Seed produced under low soil moisture exhibited less infection by P. longicolla (18 vs. 58% maximum) and greater germinability (66 vs. 47% minimum) than seed from high moisture soil”
Claim · model-written summary
Total nonstructural carbohydrates, N and P were greater in soybean pod walls from plants grown on high than on low moisture soil.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pod wallse0
- Treatment
- highe0
- Outcome
- Total nonstructural carbohydrates (TNC), N, and Pe0
- Direction
- greatere0
- Comparator
- low moisture soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Total nonstructural carbohydrates (TNC), N, and P were greater in pod walls from plants grown on high compared to low moisture soil”
Claim · model-written summary
Incidence of P. longicolla was lower in upper nodes (3-32%) than in lower nodes (13-58%) of soybean plants.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- upper nodese0
- Interactor
- P. longicollae0pathogen
- Outcome
- incidence of P. longicollae0
- Direction
- lowere0
- Value
- 3–32%e0
- Qualifier
- 13–58%e0
- Comparator
- lower nodese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“A lower incidence of P. longicolla in upper nodes (3–32%) compared to lower nodes (13–58%) of plants”
Claim · model-written summary
Lower incidence of P. longicolla in upper nodes was associated with higher seed germination levels.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- upper nodese0
- Interactor
- P. longicollae0pathogen
- Outcome
- germination levelse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“A lower incidence of P. longicolla in upper nodes (3–32%) compared to lower nodes (13–58%) of plants was associated with higher germination levels”
Claim · model-written summary
Lower incidence of P. longicolla in upper nodes was associated with lower K in pod walls.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pod wallse0
- Interactor
- P. longicollae0pathogen
- Outcome
- Ke0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“A lower incidence of P. longicolla in upper nodes (3–32%) compared to lower nodes (13–58%) of plants was associated with higher germination levels, lower K, and greater Ca and TNC levels in pod walls”
Claim · model-written summary
Lower incidence of P. longicolla in upper nodes was associated with greater Ca and TNC levels in pod walls.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pod wallse0
- Interactor
- P. longicollae0pathogen
- Outcome
- Ca and TNC levelse0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“A lower incidence of P. longicolla in upper nodes (3–32%) compared to lower nodes (13–58%) of plants was associated with higher germination levels, lower K, and greater Ca and TNC levels in pod walls”
Claim · model-written summary
Soybean seed germination decreased by 14% 20 weeks after harvest maturity in 1981.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- seed germinatione0
- Direction
- Decreasese0
- Value
- 14%e0
- Qualifier
- 20 weeks after harvest maturity in 1981e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Decreases in seed germination of 14%, 20 weeks after harvest maturity in 1981”
Claim · model-written summary
Soybean seed germination decreased by 7% 8 weeks after harvest maturity in 1982, and this decrease was associated with increased seed infection by P. longicolla (10-15%) in 1982.
- Taxon
- SoybeanGlycine maxt0
- Interactor
- P. longicollae0pathogen
- Outcome
- seed germinatione0
- Direction
- Decreasese0
- Value
- 7%e0
- Qualifier
- 8 weeks after harvest maturity in 1982e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Decreases in seed germination of 14%, 20 weeks after harvest maturity in 1981, and 7%, 8 weeks after harvest maturity in 1982, were only associated with increased seed infection by P. longicolla (10–15%) in 1982”
Claim · model-written summary
The difference in P. longicolla between years due to harvest delay was associated with higher TNC levels in pod walls from high soil moisture treatments in 1982 (86-145 vs. 55-58 g kg-1 dry weight).
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pod wallse0
- Treatment
- high soil moisture treatmentse0
- Interactor
- P. longicollae0pathogen
- Outcome
- levels of TNCe0
- Direction
- highere0
- Value
- 86–145 vs. 55–58 g kg −1 dry weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“This difference in P. longicolla between years due to harvest delay was associated with higher levels of TNC in pod walls from high soil moisture treatments in 1982 (86–145 vs. 55–58 g kg −1 dry weight)”
Claim · model-written summary
The authors suggest seed infection by P. longicolla might be reduced by preventing pod wall accumulation of TNC, N and P, increasing pod wall Ca accumulation, and shortening the time from physiological maturity to harvest maturity.
- Taxon
- SoybeanGlycine maxt0
- Interactor
- P. longicollae0pathogen
- Outcome
- seed infection by P. longicollae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Reducing seed infection by P. longicolla might be achieved by preventing pod wall accumulation of TNC, N, and P, increasing pod wall accumulation of Ca, and shortening the time from physiological maturity to harvest maturity”
The same questions in other papers
fertilization · quality: grain · Glycine max (soybean)Positive and negative results
4 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
20 papers more in this group
See all 24 papers →fertilization · disease · Glycine max (soybean)Positive and negative results
8 papers in the same direction as this paper · 32 in the opposite direction
- positive
- positive
- positive
37 papers more in this group
See all 41 papers →soil water · growth · Glycine max (soybean)Positive and negative results
15 papers in the same direction as this paper · 29 in the opposite direction
- negative
- negative
- no effect
41 papers more in this group
See all 45 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.