Abstract
The activity of sorbitol dehydrogenase (SDH) may be the primary determinant of apple fruit carbohydrate accumulation, perhaps defining cultivar-specific fruit growth rates. During two intervals following June drop, fruit SDH activity of 5 cultivars was assayed along with measurements of fruit relative growth rate (RGR) and total soluble carbohydrate (TSC) and sorbitol levels of fruit cortex tissue. SDH activity varied over 2-fold among cultivars in interval 1 and nearly 7-fold in interval 2. SDH activity was not correlated to fruit RGR or cortex TSC level, but it was negatively correlated to cortex sorbitol level. Defoliation and girdling to restrict sorbitol import slowed fruit growth and reduced SDH activity to nondetectable levels. Growth resumption, presumably following phloem re-establishment in the girdled zone, was accompanied by substantial SDH activity. SDH activity appears to be cultivar-specific and may be influenced by substrate, i.e., sorbitol, availability. While SDH likely plays a key role in apple fruit carbohydrate accumulation, its activity alone may not determine cultivar-specific fruit growth rate.
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Claims 12
Claim · model-written summary
Fruit SDH activity varied more than twofold among apple cultivars in interval 1.
- Taxon
- APPLE
Malus domesticat0 - Gene
- SDHe0
- Outcome
- SDH activitye0
- Direction
- variede0
- Value
- over 2-folde0
- Qualifier
- interval 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“SDH activity varied over 2-fold among cultivars in interval 1”
Claim · model-written summary
Fruit SDH activity varied nearly sevenfold among apple cultivars in interval 2.
- Taxon
- APPLEMalus domesticat0
- Gene
- SDHe0
- Outcome
- SDH activitye0
- Direction
- variede0
- Value
- nearly 7-folde0
- Qualifier
- interval 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“SDH activity varied over 2-fold among cultivars in interval 1 and nearly 7-fold in interval 2”
Claim · model-written summary
SDH activity was not correlated with apple fruit relative growth rate.
- Taxon
- APPLEMalus domesticat0
- Gene
- SDHe0
- Outcome
- fruit RGRe0
- Direction
- not correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“SDH activity was not correlated to fruit RGR or cortex TSC level”
Claim · model-written summary
SDH activity was not correlated with cortex TSC level.
- Taxon
- APPLEMalus domesticat0
- Organ / stage
- cortexe0
- Gene
- SDHe0
- Outcome
- TSC levele0
- Direction
- not correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“SDH activity was not correlated to fruit RGR or cortex TSC level”
Claim · model-written summary
SDH activity was negatively correlated with cortex sorbitol level.
- Taxon
- APPLEMalus domesticat0
- Organ / stage
- cortexe0
- Gene
- SDHe1
- Outcome
- sorbitol levele0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“it was negatively correlated to cortex sorbitol level”
e1“SDH activity was not correlated”
Claim · model-written summary
Defoliation slowed apple fruit growth.
- Taxon
- APPLEMalus domesticat0
- Treatment
- Defoliatione0
- Outcome
- fruit growthe0
- Direction
- slowede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“Defoliation and girdling to restrict sorbitol import slowed fruit growth and reduced SDH activity to nondetectable levels”
Claim · model-written summary
Girdling slowed apple fruit growth.
- Taxon
- APPLEMalus domesticat0
- Treatment
- girdlinge0
- Outcome
- fruit growthe0
- Direction
- slowede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“Defoliation and girdling to restrict sorbitol import slowed fruit growth and reduced SDH activity to nondetectable levels”
Claim · model-written summary
Defoliation reduced fruit SDH activity to nondetectable levels.
- Taxon
- APPLEMalus domesticat0
- Treatment
- Defoliatione0
- Gene
- SDHe0
- Outcome
- SDH activitye0
- Direction
- reducede0
- Qualifier
- nondetectable levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“Defoliation and girdling to restrict sorbitol import slowed fruit growth and reduced SDH activity to nondetectable levels”
Claim · model-written summary
Girdling reduced fruit SDH activity to nondetectable levels.
- Taxon
- APPLEMalus domesticat0
- Treatment
- girdlinge0
- Gene
- SDHe0
- Outcome
- SDH activitye0
- Direction
- reducede0
- Qualifier
- nondetectable levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“Defoliation and girdling to restrict sorbitol import slowed fruit growth and reduced SDH activity to nondetectable levels”
Claim · model-written summary
Growth resumption was accompanied by substantial SDH activity.
- Taxon
- APPLEMalus domesticat0
- Treatment
- girdlede0
- Gene
- SDHe0
- Outcome
- substantial SDH activitye0
- Qualifier
- presumably following phloem re-establishmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“Growth resumption, presumably following phloem re-establishment in the girdled zone, was accompanied by substantial SDH activity”
Claim · model-written summary
SDH activity appears cultivar-specific and may be influenced by sorbitol availability.
- Taxon
- APPLEMalus domesticat0
- Gene
- SDHe0
- Compound
- sorbitole0
- Outcome
- SDH activitye0
- Qualifier
- cultivar-specifice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“SDH activity appears to be cultivar-specific and may be influenced by substrate, i.e., sorbitol, availability”
Claim · model-written summary
SDH likely contributes to carbohydrate accumulation but activity alone may not determine cultivar-specific growth rate.
- Taxon
- appleMalus domesticae0
- Gene
- SDHe0
- Outcome
- apple fruit carbohydrate accumulatione0
- Qualifier
- its activity alone may not determine cultivar-specific fruit growth ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“APPLE FRUIT”
e0“While SDH likely plays a key role in apple fruit carbohydrate accumulation, its activity alone may not determine cultivar-specific fruit growth rate”
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See all 106 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.