Abstract
Muskmelon (Cucumis melo L.) plants were exposed to a 10 degrees C chilling treatment for 72 hours, which induced leaf chilling injury symptoms (wilting, appearance of water-soaked areas, necrosis). Chilling caused an accumulation of starch, sucrose, hexoses (glucose and fructose), and certain amino acids (glutamate, aspartate, and citrulline) in source leaf tissues, but no accumulation of stachyose or other galactosyl-oligosaccharides occurred. Chilling also caused a general increase in sugar (stachyose, raffinose, sucrose) and amino acid content of the phloem sap, although rates of phloem transport were apparently reduced. Pretreatment of the leaves with a 20-milligram per liter abscisic acid (ABA) spray before chilling prevented the appearance of chilling injury symptoms. ABA pretreatment had little or no affect on sugar accumulation in leaf tissues but greatly reduced or eliminated the chilling-induced amino acid accumulation. Higher levels of aspartate and particularly of arginine were found in phloem saps from ABA-pretreated plants. The data indicate that changes in leaf metabolism caused by environmental stresses such as chilling may change the composition of cucurbit phloem sap. This raises the possibility that some of the deleterious effects of stress on sink tissues may, in part, be due to alterations in the nature of the assimilate supply.
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Claims 11
Claim · model-written summary
A 10 degrees C chilling treatment for 72 hours induced leaf chilling injury symptoms in muskmelon plants.
- Taxon
- Muskmelon
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Cucumis meloe0 - Treatment
- 10 degrees C chilling treatment for 72 hourse0
- Outcome
- leaf chilling injury symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Muskmelon (Cucumis melo L.) plants were exposed to a 10 degrees C chilling treatment for 72 hours, which induced leaf chilling injury symptoms”
Claim · model-written summary
Chilling caused accumulation of starch, sucrose and hexoses (glucose and fructose) in source leaf tissues of muskmelon.
- Taxon
- MuskmelonCucumis meloe0
- Organ / stage
- source leaf tissuese1
- Treatment
- Chillinge1
- Outcome
- starch, sucrose, hexoses (glucose and fructose)e1
- Direction
- accumulatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“Chilling caused an accumulation of starch, sucrose, hexoses (glucose and fructose), and certain amino acids (glutamate, aspartate, and citrulline) in source leaf tissues”
Claim · model-written summary
Chilling caused accumulation of certain amino acids (glutamate, aspartate, citrulline) in source leaf tissues of muskmelon.
- Taxon
- MuskmelonCucumis meloe0
- Organ / stage
- source leaf tissuese1
- Treatment
- Chillinge1
- Outcome
- certain amino acids (glutamate, aspartate, and citrulline)e1
- Direction
- accumulatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“Chilling caused an accumulation of starch, sucrose, hexoses (glucose and fructose), and certain amino acids (glutamate, aspartate, and citrulline) in source leaf tissues”
Claim · model-written summary
Chilling did not lead to accumulation of stachyose or other galactosyl-oligosaccharides in muskmelon source leaf tissues.
- Taxon
- MuskmelonCucumis meloe0
- Organ / stage
- source leaf tissuese1
- Treatment
- Chillinge1
- Outcome
- accumulation of stachyose or other galactosyl-oligosaccharidese1
- Direction
- no accumulatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“Chilling caused an accumulation of starch, sucrose, hexoses (glucose and fructose), and certain amino acids (glutamate, aspartate, and citrulline) in source leaf tissues, but no accumulation of stachyose or other galactosyl-oligosaccharides occurred”
Claim · model-written summary
Chilling caused a general increase in sugar (stachyose, raffinose, sucrose) and amino acid content of muskmelon phloem sap.
- Taxon
- MuskmelonCucumis meloe0
- Organ / stage
- phloem sape1
- Treatment
- Chillinge1
- Outcome
- sugar (stachyose, raffinose, sucrose) and amino acid contente1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“Chilling also caused a general increase in sugar (stachyose, raffinose, sucrose) and amino acid content of the phloem sap”
Claim · model-written summary
Chilling apparently reduced the rates of phloem transport in muskmelon.
- Taxon
- MuskmelonCucumis meloe0
- Treatment
- Chillinge1
- Outcome
- rates of phloem transporte1
- Direction
- reducede1
- Qualifier
- apparentlye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“Chilling also caused a general increase in sugar (stachyose, raffinose, sucrose) and amino acid content of the phloem sap, although rates of phloem transport were apparently reduced”
Claim · model-written summary
Pretreating muskmelon leaves with a 20 mg per liter ABA spray before chilling prevented the appearance of chilling injury symptoms.
- Taxon
- MuskmelonCucumis meloe0
- Treatment
- Pretreatment of the leaves with a 20-milligram per liter abscisic acid (ABA) spraye1
- Outcome
- chilling injury symptomse1
- Direction
- preventede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“Pretreatment of the leaves with a 20-milligram per liter abscisic acid (ABA) spray before chilling prevented the appearance of chilling injury symptoms”
Claim · model-written summary
ABA pretreatment had little or no effect on sugar accumulation in muskmelon leaf tissues.
- Taxon
- MuskmelonCucumis meloe0
- Organ / stage
- leaf tissuese1
- Treatment
- ABA pretreatmente1
- Outcome
- sugar accumulatione1
- Direction
- little or no affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“ABA pretreatment had little or no affect on sugar accumulation in leaf tissues”
Claim · model-written summary
ABA pretreatment greatly reduced or eliminated the chilling-induced amino acid accumulation in muskmelon.
- Taxon
- MuskmelonCucumis meloe0
- Treatment
- ABA pretreatmente1
- Outcome
- chilling-induced amino acid accumulatione1
- Direction
- greatly reduced or eliminatede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“ABA pretreatment had little or no affect on sugar accumulation in leaf tissues but greatly reduced or eliminated the chilling-induced amino acid accumulation”
Claim · model-written summary
Phloem saps from ABA-pretreated muskmelon plants had higher levels of aspartate and particularly of arginine.
- Taxon
- MuskmelonCucumis meloe0
- Organ / stage
- phloem sapse1
- Treatment
- ABA-pretreated plantse1
- Outcome
- levels of aspartate and particularly of argininee1
- Direction
- Highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon (Cucumis melo L.)”
e1“Higher levels of aspartate and particularly of arginine were found in phloem saps from ABA-pretreated plants”
Claim · model-written summary
The authors conclude that changes in leaf metabolism caused by environmental stresses such as chilling may change the composition of cucurbit phloem sap.
- Taxon
- cucurbite0
- Treatment
- environmental stresses such as chillinge0
- Outcome
- composition of cucurbit phloem sape0
Not reportedComparatorDirection
Verbatim
e0“The data indicate that changes in leaf metabolism caused by environmental stresses such as chilling may change the composition of cucurbit phloem sap”
The same questions in other papers
(+)-abscisic acid · molecular: metabolites · Cucumis melo (muskmelon)Results agree
1 paper in the same direction as this paper
- positive
application · crop injury · Cucumis melo (muskmelon)Positive and negative results
1 in the opposite direction
- negative
cold · molecular: metabolites · Cucumis melo (muskmelon)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.