Abstract
Abstract Studies were conducted to investigate the influence of 50 μl·liter −1 ethylene on the cell wall, polygalacturonase (PG) activity, and electrolyte leakage of harvested watermelon [ Citrullus lanatus (thunb) Matsum and Nakai] fruit. Electrolyte leakage was significantly increased in tissues from ethylene-treated fruit. The highest leakage occurred in distilled water, although the net effect of ethylene was less dramatic due to high leakage from control fruit. Leakage was greatly reduced but the ethylene effect more apparent compared to the control when tissues were incubated in an isotonic medium of mannitol or in isotonic medium containing CaCl 2 . Polygalacturonase activity increased markedly in ethylene-treated fruit, showing a > 10-fold rise during the first 6 days of treatment. Little change in PG activity occurred in melons stored in air, even in fruit stored for as long as 120 days. Cell walls of fruit exposed to ethylene exhibited acute ultrastructural damage. The decline in placental tissue firmness and the development of watersoaking symptoms observed by the third day of 50 μl·liter −1 ethylene treatment were apparently due, in part, to the PG-mediated cell wall breakdown resulting in cell rupture. Additionally, ethylene appeared to enhance membrane permeability.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 8
Claim · model-written summary
Ethylene significantly increased electrolyte leakage.
- Taxon
- Watermelon
Citrullus lanatust0 - Treatment
- ethylene-treatede0
- Outcome
- Electrolyte leakagee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrolyte leakage was significantly increased in tissues from ethylene-treated fruit.”
t0“Watermelon”
Claim · model-written summary
Leakage was highest in distilled water.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- leakagee0
- Direction
- higheste0
- Setting
- distilled watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest leakage occurred in distilled water”
t0“Watermelon”
Claim · model-written summary
Isotonic media reduced leakage and made the ethylene effect more apparent.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- isotonic medium of mannitole0
- Outcome
- Leakagee0
- Direction
- reducede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leakage was greatly reduced but the ethylene effect more apparent compared to the control when tissues were incubated in an isotonic medium of mannitol or in isotonic medium containing CaCl 2 .”
t0“Watermelon”
Claim · model-written summary
Ethylene increased polygalacturonase activity more than tenfold over six days.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- ethylene-treatede0
- Outcome
- Polygalacturonase activitye0
- Direction
- increasede0
- Value
- > 10-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Polygalacturonase activity increased markedly in ethylene-treated fruit, showing a > 10-fold rise during the first 6 days of treatment.”
t0“Watermelon”
Claim · model-written summary
Air-stored fruit showed little PG activity change over up to 120 days.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- PG activitye0
- Direction
- Little changee0
- Qualifier
- 120 dayse0
- Setting
- stored in aire0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Little change in PG activity occurred in melons stored in air, even in fruit stored for as long as 120 days.”
t0“Watermelon”
Claim · model-written summary
Ethylene-exposed fruit cell walls showed acute ultrastructural damage.
- Taxon
- WatermelonCitrullus lanatust0
- Organ / stage
- Cell wallse0
- Treatment
- ethylenee0
- Outcome
- acute ultrastructural damagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cell walls of fruit exposed to ethylene exhibited acute ultrastructural damage.”
t0“Watermelon”
Claim · model-written summary
Ethylene-associated PG-mediated breakdown apparently contributed to firmness decline and watersoaking.
- Taxon
- WatermelonCitrullus lanatust0
- Gene
- PGe0
- Outcome
- decline in placental tissue firmness and the development of watersoaking symptomse0
- Qualifier
- PG-mediated cell wall breakdowne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in placental tissue firmness and the development of watersoaking symptoms observed by the third day of 50 μl·liter −1 ethylene treatment were apparently due, in part, to the PG-mediated cell wall breakdown resulting in cell rupture.”
t0“Watermelon”
Claim · model-written summary
Ethylene appeared to enhance membrane permeability.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- ethylenee0
- Outcome
- membrane permeabilitye0
- Direction
- enhancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethylene appeared to enhance membrane permeability.”
t0“Watermelon”
The same questions in other papers
ethene · pest · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- negative
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.