Abstract
SummaryThe role of polyamines in fruitlet abscission of mango (Magnifiera indica L.) was studied by estimating the endogenous polyamines in intact and about-to-abscind fruitlets and their pedicels, and the effect of exogenous applications of polyamines and inhibitors of polyamine biosynthesis. Endogenous free polyamines (putrescine, spermidine and spermine) were estimated in intact and about-to-abscind fruitlets and their pedicels at three developmental stages in ‘Kensington Pride’ and ‘Glen’ mango. Intact fruitlets and their pedicels exhibited 276% and 341% higher total free polyamines than about-to-abscind ones in ‘Kensington Pride’, whilst in ‘Glen’; the increase was 137% and 63%, respectively. Mean spermine concentrations were higher in intact tissues of ‘Kensington Pride’ (fruitlets 220 nmol g–1 FW, pedicels 172 nmol g–1 FW), while spermidine concentrations were greater in ‘Glen’ (fruitlets 244.5 nmol g–1 FW, pedicels 256 nmol g–1 FW). The role of spermine seems to be critical in mango fruitlet abscission as the about-to-abscind fruitlets had very low levels of spermine (10.4% and 19% of intact fruitlets) in ‘Kensington Pride’ and ‘Glen’, respectively. Exogenous applications of polyamines reduced fruitlet abscission during the initial heavy fruitlet abscission period (two weeks after fruit set) and the response was significantly influenced by type, concentration and time of application. Spermidine (0.1 mM) was the most effective of the three polyamines applied at the fruit-set stage, reducing fruitlet abscission by 6.8% compared with the control. Of the four times of application, spermine (0.1 mM) sprayed when the panicle had grown 5–8 cm showed least fruitlets abscission (91.5%) compared with controls (95.5%) after six weeks of fruit set. Higher levels of endogenous polyamines in intact fruitlets and their pedicels, compared with about-to-abscind ones, and the reduction of fruitlet abscission with exogenous application of polyamines, as well as the acceleration with inhibitors of polyamines, demonstrate the key role of polyamines biosynthesis in mango fruitlet abscission.
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 16
Claim · model-written summary
Intact fruitlets of Kensington Pride had 276% higher total free polyamines than about-to-abscind fruitlets.
- Taxon
- mango
_from_India.jpg?width=60)
Mangifera indicat0 - Material
- Kensington Pridee1
- Organ / stage
- fruitletse1
- Outcome
- total free polyaminese1
- Direction
- highere1
- Value
- 276%e1
- Comparator
- about-to-abscind onese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_from_India.jpg?width=500)
Verbatim
t0“Abscission of mango fruitlets”
e1“Intact fruitlets and their pedicels exhibited 276% and 341% higher total free polyamines than about-to-abscind ones in ‘Kensington Pride’, whilst in ‘Glen’; the increase was 137% and 63%, respectively”
Claim · model-written summary
Intact pedicels of Kensington Pride had 341% higher total free polyamines than about-to-abscind pedicels.
- Taxon
- mangoMangifera indicat0
- Material
- Kensington Pridee1
- Organ / stage
- pedicelse1
- Outcome
- total free polyaminese1
- Direction
- highere1
- Value
- 341%e1
- Comparator
- about-to-abscind onese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e1“Intact fruitlets and their pedicels exhibited 276% and 341% higher total free polyamines than about-to-abscind ones in ‘Kensington Pride’, whilst in ‘Glen’; the increase was 137% and 63%, respectively”
Claim · model-written summary
Intact fruitlets of Glen had 137% higher total free polyamines than about-to-abscind fruitlets.
- Taxon
- mangoMangifera indicat0
- Material
- Glene1
- Organ / stage
- fruitletse1
- Outcome
- total free polyaminese1
- Direction
- highere1
- Value
- 137%e1
- Comparator
- about-to-abscind onese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e1“Intact fruitlets and their pedicels exhibited 276% and 341% higher total free polyamines than about-to-abscind ones in ‘Kensington Pride’, whilst in ‘Glen’; the increase was 137% and 63%, respectively”
Claim · model-written summary
Intact pedicels of Glen had 63% higher total free polyamines than about-to-abscind pedicels.
- Taxon
- mangoMangifera indicat0
- Material
- Glene1
- Organ / stage
- pedicelse1
- Outcome
- total free polyaminese1
- Direction
- highere1
- Value
- 63%e1
- Comparator
- about-to-abscind onese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e1“Intact fruitlets and their pedicels exhibited 276% and 341% higher total free polyamines than about-to-abscind ones in ‘Kensington Pride’, whilst in ‘Glen’; the increase was 137% and 63%, respectively”
Claim · model-written summary
Spermine concentrations in Kensington Pride fruitlets were higher in intact tissue (220 nmol g-1 FW).
- Taxon
- mangoMangifera indicat0
- Material
- Kensington Pridee2
- Organ / stage
- fruitletse2
- Outcome
- spermine concentrationse2
- Direction
- highere2
- Value
- 220 nmol g–1 FWe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e2“Mean spermine concentrations were higher in intact tissues of ‘Kensington Pride’ (fruitlets 220 nmol g–1 FW, pedicels 172 nmol g–1 FW)”
Claim · model-written summary
Spermine concentrations in Kensington Pride pedicels were higher in intact tissue (172 nmol g-1 FW).
- Taxon
- mangoMangifera indicat0
- Material
- Kensington Pridee2
- Organ / stage
- pedicelse2
- Outcome
- spermine concentrationse2
- Direction
- highere2
- Value
- 172 nmol g–1 FWe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e2“Mean spermine concentrations were higher in intact tissues of ‘Kensington Pride’ (fruitlets 220 nmol g–1 FW, pedicels 172 nmol g–1 FW)”
Claim · model-written summary
Spermidine concentrations in Glen fruitlets were greater (244.5 nmol g-1 FW).
- Taxon
- mangoMangifera indicat0
- Material
- Glene3
- Organ / stage
- fruitletse3
- Outcome
- spermidine concentrationse3
- Direction
- greatere3
- Value
- 244.5 nmol g–1 FWe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e3“while spermidine concentrations were greater in ‘Glen’ (fruitlets 244.5 nmol g–1 FW, pedicels 256 nmol g–1 FW)”
Claim · model-written summary
Spermidine concentrations in Glen pedicels were greater (256 nmol g-1 FW).
- Taxon
- mangoMangifera indicat0
- Material
- Glene3
- Organ / stage
- pedicelse3
- Outcome
- spermidine concentrationse3
- Direction
- greatere3
- Value
- 256 nmol g–1 FWe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e3“while spermidine concentrations were greater in ‘Glen’ (fruitlets 244.5 nmol g–1 FW, pedicels 256 nmol g–1 FW)”
Claim · model-written summary
About-to-abscind Kensington Pride fruitlets had very low spermine levels (10.4% of intact fruitlets).
- Taxon
- mangoMangifera indicat0
- Material
- Kensington Pridee4
- Organ / stage
- about-to-abscind fruitletse4
- Outcome
- levels of sperminee4
- Direction
- very lowe4
- Value
- 10.4%e4
- Comparator
- intact fruitletse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e4“The role of spermine seems to be critical in mango fruitlet abscission as the about-to-abscind fruitlets had very low levels of spermine (10.4% and 19% of intact fruitlets) in ‘Kensington Pride’ and ‘Glen’, respectively”
Claim · model-written summary
About-to-abscind Glen fruitlets had very low spermine levels (19% of intact fruitlets).
- Taxon
- mangoMangifera indicat0
- Material
- Glene4
- Organ / stage
- about-to-abscind fruitletse4
- Outcome
- levels of sperminee4
- Direction
- very lowe4
- Value
- 19%e4
- Comparator
- intact fruitletse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e4“The role of spermine seems to be critical in mango fruitlet abscission as the about-to-abscind fruitlets had very low levels of spermine (10.4% and 19% of intact fruitlets) in ‘Kensington Pride’ and ‘Glen’, respectively”
Claim · model-written summary
Spermine seems to be critical in mango fruitlet abscission.
- Taxon
- mangoMangifera indicat0
- Compound
- sperminee4
- Outcome
- fruitlet abscissione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e4“The role of spermine seems to be critical in mango fruitlet abscission as the about-to-abscind fruitlets had very low levels of spermine (10.4% and 19% of intact fruitlets) in ‘Kensington Pride’ and ‘Glen’, respectively”
Claim · model-written summary
Exogenous polyamine applications reduced fruitlet abscission during the initial heavy abscission period.
- Taxon
- mangoMangifera indicat0
- Treatment
- Exogenous applications of polyaminese5
- Outcome
- fruitlet abscissione5
- Direction
- reducede5
- Qualifier
- during the initial heavy fruitlet abscission period (two weeks after fruit set)e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e5“Exogenous applications of polyamines reduced fruitlet abscission during the initial heavy fruitlet abscission period (two weeks after fruit set)”
Claim · model-written summary
Spermidine (0.1 mM) applied at fruit set reduced fruitlet abscission by 6.8% compared with the control.
- Taxon
- mangoMangifera indicat0
- Organ / stage
- fruit-set stagee6
- Treatment
- Spermidine (0.1 mM)e6
- Outcome
- fruitlet abscissione6
- Direction
- reducinge6
- Value
- 6.8%e6
- Qualifier
- the most effective of the three polyaminese6
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e6“Spermidine (0.1 mM) was the most effective of the three polyamines applied at the fruit-set stage, reducing fruitlet abscission by 6.8% compared with the control”
Claim · model-written summary
Spermine (0.1 mM) sprayed at panicle 5-8 cm showed the least fruitlet abscission (91.5%) compared with controls (95.5%) six weeks after fruit set.
- Taxon
- mangoMangifera indicat0
- Treatment
- spermine (0.1 mM)e7
- Outcome
- fruitlets abscissione7
- Direction
- leaste7
- Value
- 91.5%e7
- Qualifier
- after six weeks of fruit sete7
- Comparator
- controlse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e7“Of the four times of application, spermine (0.1 mM) sprayed when the panicle had grown 5–8 cm showed least fruitlets abscission (91.5%) compared with controls (95.5%) after six weeks of fruit set”
Claim · model-written summary
Inhibitors of polyamine biosynthesis accelerated fruitlet abscission.
- Taxon
- mangoMangifera indicat0
- Treatment
- inhibitors of polyaminese6
- Outcome
- fruitlet abscissione6
- Direction
- acceleratione6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e6“the reduction of fruitlet abscission with exogenous application of polyamines, as well as the acceleration with inhibitors of polyamines”
Claim · model-written summary
Polyamine biosynthesis plays a key role in mango fruitlet abscission.
- Taxon
- mangoMangifera indicat0
- Compound
- polyaminese7
- Outcome
- fruitlet abscissione7
- Qualifier
- key role of polyamines biosynthesise7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Abscission of mango fruitlets”
e7“demonstrate the key role of polyamines biosynthesis in mango fruitlet abscission”
The same questions in other papers
spermine · yield · Mangifera indica (mango)Results agree
2 papers in the same direction as this paper
- positive
- positive
spermidine · yield · Mangifera indica (mango)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.