Abstract
Tomato leaves were detached and stored at 0 C for various periods of time. Chloroplasts were isolated from the leaves and their photoreductive activities were determined. Comparisons were made between two altitudinal forms of the wild tomato Lycopersicon hirsutum Humb. and Bonpl. (a tropical lowlands form and a highlands form adapted to growth at 3,100 meters), and two cultivars of the domestic tomato L. esculentum Mill. In each case the capacity of the isolated chloroplasts to photoreduce ferricyanide declined linearly with time of storage of the leaves at 0 C, but not at 10 C. This injury developed more slowly in the high altitudinal form of the wild tomato compared with the low altitudinal form and the two domestic cultivars indicating an enhanced resistance toward chilling injury in the tomato from 3,100 meters. Chloroplast activity declined in green tomato fruit held at 0 C, at about the same rate as in the chilled leaves.Measurements of photochemical activities in the isolated chloroplasts and in vivo measurements of cytochrome-554 photooxidation in chilled leaves showed that the site of action of the chilling effect was water donation to photosystem II.The chilling-induced impairment of photoreductive activity in chloroplasts provides a useful assay for detecting and measuring differences in the susceptibility of plants to chilling injury.
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Claims 5
Claim · model-written summary
Chloroplast photoreduction in chilled tomato leaves declined linearly with storage time at 0 C but not at 10 C.
- Taxon
- Tomato
Solanum lycopersicume0 - Organ / stage
- leavese1
- Treatment
- storage of the leaves at 0 Ce1
- Outcome
- capacity of the isolated chloroplasts to photoreduce ferricyanidee1
- Direction
- declined linearlye1
- Comparator
- 10 Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato leaves were detached and stored at 0 C for various periods of time”
e1“In each case the capacity of the isolated chloroplasts to photoreduce ferricyanide declined linearly with time of storage of the leaves at 0 C, but not at 10 C”
Claim · model-written summary
Chilling injury developed more slowly in the high altitudinal form of wild tomato than in the low altitudinal form and the two domestic cultivars.
Verbatim
e2“This injury developed more slowly in the high altitudinal form of the wild tomato compared with the low altitudinal form and the two domestic cultivars”
Claim · model-written summary
Chloroplast activity declined in green tomato fruit held at 0 C at about the same rate as in chilled leaves.
- Taxon
- tomatoSolanum lycopersicume3
- Organ / stage
- green tomato fruite3
- Treatment
- held at 0 Ce3
- Outcome
- Chloroplast activitye3
- Direction
- declinede3
- Comparator
- chilled leavese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Chloroplast activity declined in green tomato fruit held at 0 C, at about the same rate as in the chilled leaves”
Claim · model-written summary
The site of action of the chilling effect was water donation to photosystem II.
- Taxon
- TomatoesSolanum lycopersicumt0
- Outcome
- site of action of the chilling effecte4
- Qualifier
- water donation to photosystem IIe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Measurements of photochemical activities in the isolated chloroplasts and in vivo measurements of cytochrome-554 photooxidation in chilled leaves showed that the site of action of the chilling effect was water donation to photosystem II”
t0“Wild and Domestic Tomatoes”
Claim · model-written summary
Chilling-induced impairment of chloroplast photoreduction is a useful assay for differences in chilling susceptibility of plants.
- Taxon
- TomatoesSolanum lycopersicumt0
- Outcome
- differences in the susceptibility of plants to chilling injurye5
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The chilling-induced impairment of photoreductive activity in chloroplasts provides a useful assay for detecting and measuring differences in the susceptibility of plants to chilling injury”
t0“Wild and Domestic Tomatoes”
The same questions in other papers
storage · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results
5 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
21 papers more in this group
See all 25 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.