Abstract
SUMMARY Summer pumpkin ( Cucurbita pepo L.) is an herbaceous plant with big fruits and oily seeds. Photosynthetic oxygen release was previously proposed to promote storage activity of seeds under internal hypoxia, in particular in oilseeds. Photosynthetic activity or any other function of chlorophylls from pumpkin seeds has never been demonstrated. The aim of the present research was to test whether illumination of pumpkin fruits has any influence on the yield and to measure photosynthetic activity of pumpkin seeds. The fruits grown in the dark were not significantly different from controls exposed to light in regard to fruit weight, size, number and weight of seeds or the content of lipids and pigments. Delayed fluorescence measurement showed no photosynthetic activity in pumpkin seeds in any developmental stage. Fruit wall, on the other hand, had significant photosynthetic activity. It is concluded that chlorophyll in pumpkin seeds does not mediate photosynthesis, which would in turn result in increased pumpkin yield.
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Claims 5
Claim · model-written summary
Dark-grown fruits did not differ significantly from lit controls in fruit weight and size.
Verbatim
e0“The fruits grown in the dark were not significantly different from controls exposed to light in regard to fruit weight, size”
e1“Summer pumpkin ( Cucurbita pepo L.)”
Claim · model-written summary
Dark-grown fruits did not differ significantly from lit controls in seed number or weight.
Verbatim
e0“The fruits grown in the dark were not significantly different from controls exposed to light in regard to fruit weight, size, number and weight of seeds”
e1“Summer pumpkin ( Cucurbita pepo L.)”
Claim · model-written summary
Dark-grown fruits did not differ significantly from lit controls in lipid and pigment content.
Verbatim
e0“The fruits grown in the dark were not significantly different from controls exposed to light in regard to fruit weight, size, number and weight of seeds or the content of lipids and pigments”
e1“Summer pumpkin ( Cucurbita pepo L.)”
Claim · model-written summary
Pumpkin seeds showed no photosynthetic activity at any developmental stage.
Not reportedDirection
Verbatim
e0“no photosynthetic activity in pumpkin seeds in any developmental stage”
Claim · model-written summary
The fruit wall had significant photosynthetic activity.
Not reportedDirection
Verbatim
e0“Fruit wall, on the other hand, had significant photosynthetic activity”
e1“Summer pumpkin ( Cucurbita pepo L.)”
The same questions in other papers
light · physiology: pigments · Cucurbita (pumpkins)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
light · yield · Cucurbita (pumpkins)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- no effect
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.