Abstract
6-benzylaminopurine (BAP) delays leaf abscission of soybean Glycine max (L.) Merr. Abscission of the distal pulvinus of primary leaves was induced in 12-d-old seedlings or explants by removal of the leaf blade. BAP applied to the cut end of the pulvinus following leaf blade removal delayed abscission. Discoloration of the pulvinus occurred before abscission commenced and the number of grana in chloroplasts within cortical parenchyma cells of the pulvinus decreased over time following leaf blade removal. BAP prevented discoloration of pulvinus tissues and a decrease in grana number. Starch grains within amyloplasts of cells of the starch sheath in the pulvinus disappeared following leaf blade removal, whereas starch accumulated within the abscission zone prior to abscission. BAP prevented this apparent redistribution of starch and instead promoted an increase in starch within plastids of cortical parenchyma cells of the pulvinus. During the abscission process, cells within the separation layer enlarged and their nuclei and nucleoli became more evident prior to their separation from one another. Cell separation resulted from breakdown of middle lamellae and partial degradation of primary cell walls. Cycloheximide applied directly to the external surface of the abscission zone inhibited abscission in a similar way to the BAP treatment. These results suggest that BAP prevents abscission by altering patterns of starch distribution in the pulvinus and abscission zone and by inhibiting the synthesis of proteins that typically appear de novo in induced abscission zone tissues.
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Claims 13
Claim · model-written summary
BAP delayed abscission after leaf blade removal.
- Taxon
- Soybean
Glycine maxt0 - Organ / stage
- pulvinuse0
- Treatment
- BAP applied to the cut end of the pulvinuse0
- Outcome
- abscissione0
- Direction
- delayede0
- Comparator
- leaf blade removale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BAP applied to the cut end of the pulvinus following leaf blade removal delayed abscission.”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
Pulvinus discoloration preceded abscission.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pulvinuse0
- Outcome
- Discoloration of the pulvinuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Discoloration of the pulvinus occurred before abscission commenced”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
Grana numbers declined after leaf blade removal.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- cortical parenchyma cells of the pulvinuse0
- Treatment
- leaf blade removale0
- Outcome
- number of granae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of grana in chloroplasts within cortical parenchyma cells of the pulvinus decreased over time following leaf blade removal”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
BAP prevented pulvinus discoloration.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- BAPe0
- Outcome
- discoloration of pulvinus tissuese0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BAP prevented discoloration of pulvinus tissues”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
BAP prevented the decrease in grana number.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- BAPe0
- Outcome
- grana numbere0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BAP prevented discoloration of pulvinus tissues and a decrease in grana number.”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
Starch grains disappeared from the pulvinus starch sheath after leaf blade removal.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- starch sheath in the pulvinuse0
- Treatment
- leaf blade removale0
- Outcome
- Starch grainse0
- Direction
- disappearede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch grains within amyloplasts of cells of the starch sheath in the pulvinus disappeared following leaf blade removal”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
Starch accumulated in the abscission zone before abscission.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- abscission zonee0
- Outcome
- starch accumulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starch accumulated within the abscission zone prior to abscission”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
BAP prevented starch redistribution.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- BAPe0
- Outcome
- redistribution of starche0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BAP prevented this apparent redistribution of starch”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
BAP increased starch in pulvinus cortical parenchyma plastids.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- cortical parenchyma cells of the pulvinuse0
- Treatment
- BAPe0
- Outcome
- starch within plastidse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BAP prevented this apparent redistribution of starch and instead promoted an increase in starch within plastids of cortical parenchyma cells of the pulvinus”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
Separation-layer cells enlarged and their nuclei and nucleoli became more evident before separation.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- separation layere0
- Outcome
- cells within the separation layer enlarged and their nuclei and nucleoli became more evidente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cells within the separation layer enlarged and their nuclei and nucleoli became more evident prior to their separation from one another”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
Cell separation involved middle-lamella breakdown and partial primary-wall degradation.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- Cell separatione0
- Qualifier
- breakdown of middle lamellae and partial degradation of primary cell wallse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cell separation resulted from breakdown of middle lamellae and partial degradation of primary cell walls.”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
Cycloheximide inhibited abscission similarly to BAP.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Cycloheximide applied directly to the external surface of the abscission zonee0
- Outcome
- abscissione0
- Direction
- inhibitede0
- Comparator
- BAP treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycloheximide applied directly to the external surface of the abscission zone inhibited abscission in a similar way to the BAP treatment.”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
Claim · model-written summary
The authors suggest BAP prevents abscission by changing starch distribution and inhibiting synthesis of new proteins.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- BAPe0
- Outcome
- abscissione0
- Qualifier
- altering patterns of starch distribution in the pulvinus and abscission zone and by inhibiting the synthesis of proteinse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that BAP prevents abscission by altering patterns of starch distribution in the pulvinus and abscission zone and by inhibiting the synthesis of proteins that typically appear de novo in induced abscission zone tissues.”
t0“Leaf Abscission in Soybean: Cytochemical and Ultrastructural Changes following Benzylaminopurine Treatment”
The same questions in other papers
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2 papers in the same direction as this paper
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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.