Abstract
The ultrastructural changes in chloroplast of watermelon seedling leaves under darkness were observed by transmission electron microscopy(TEM).TEM observations indicated that ultrastructural damages in chloroplast became severe when it is kept under darkness.After 2-day treatment with darkness,the chloroplast expanded,the stroma lamellae decreased and arranged unregularly,the starch particles disappeared.After 4-day treatment with darkness,the lamellae were distorted or even disintegrated.After 6-day treatment with darkness,the lamellae disappeared completely,the chloroplast became spherical,the membrane of chloroplast became disintegrated and the chloroplast tended to disintegrated.When transferred to normal light(150μmol/m~2·s~(-1)) for 2 days,the starch particles started to accumulate,which indicated that the function of photosynthesis of chloroplast began to recover.However the grana were few and obscured.After 6 days of recovery in the light,the grana were clear and stacked increasingly.The ultrastructure in chloroplast recovered fast if dark-treated time was short.
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Claims 12
Claim · model-written summary
Chloroplast ultrastructural damage became severe under darkness.
- Taxon
- watermelon
Citrullus lanatust0 - Treatment
- darknesse0
- Outcome
- ultrastructural damages in chloroplaste0
- Direction
- became severee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ultrastructural damages in chloroplast became severe when it is kept under darkness.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After two days of darkness, chloroplasts expanded.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 2-day treatment with darknesse0
- Outcome
- chloroplaste0
- Direction
- expandede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 2-day treatment with darkness,the chloroplast expanded,the stroma lamellae decreased and arranged unregularly,the starch particles disappeared.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After two days of darkness, stroma lamellae decreased and became irregular.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 2-day treatment with darknesse0
- Outcome
- stroma lamellaee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 2-day treatment with darkness,the chloroplast expanded,the stroma lamellae decreased and arranged unregularly,the starch particles disappeared.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After two days of darkness, starch particles disappeared.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 2-day treatment with darknesse0
- Outcome
- starch particles disappearede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 2-day treatment with darkness,the chloroplast expanded,the stroma lamellae decreased and arranged unregularly,the starch particles disappeared.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After four days of darkness, lamellae were distorted or disintegrated.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 4-day treatment with darknesse0
- Outcome
- lamellae were distorted or even disintegratede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 4-day treatment with darkness,the lamellae were distorted or even disintegrated.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After six days of darkness, lamellae disappeared.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 6-day treatment with darknesse0
- Outcome
- lamellae disappeared completelye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 6-day treatment with darkness,the lamellae disappeared completely,the chloroplast became spherical,the membrane of chloroplast became disintegrated and the chloroplast tended to disintegrated.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After six days of darkness, chloroplasts became spherical.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 6-day treatment with darknesse0
- Outcome
- chloroplast became sphericale0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 6-day treatment with darkness,the lamellae disappeared completely,the chloroplast became spherical,the membrane of chloroplast became disintegrated and the chloroplast tended to disintegrated.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After six days of darkness, chloroplast membranes disintegrated.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 6-day treatment with darknesse0
- Outcome
- membrane of chloroplast became disintegratede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 6-day treatment with darkness,the lamellae disappeared completely,the chloroplast became spherical,the membrane of chloroplast became disintegrated and the chloroplast tended to disintegrated.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After two days in normal light, starch particles started accumulating.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- normal light(150μmol/m~2·s~(-1)) for 2 dayse0
- Outcome
- starch particlese0
- Direction
- started to accumulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When transferred to normal light(150μmol/m~2·s~(-1)) for 2 days,the starch particles started to accumulate”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After two days in light, grana remained few and obscured.
- Taxon
- watermelonCitrullus lanatust0
- Outcome
- grana were few and obscurede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However the grana were few and obscured.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
After six days of light recovery, grana became clear and increasingly stacked.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- recovery in the lighte0
- Outcome
- granae0
- Direction
- stacked increasinglye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 6 days of recovery in the light,the grana were clear and stacked increasingly.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
Claim · model-written summary
Chloroplast ultrastructure recovered faster after shorter dark treatment.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- dark-treated time was shorte0
- Outcome
- ultrastructure in chloroplaste0
- Direction
- recovered faste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ultrastructure in chloroplast recovered fast if dark-treated time was short.”
t0“watermelon seedling leaves”
t1“watermelon seedling leaves”
The same questions in other papers
light · quality: sugar starch · Citrullus lanatus (watermelon)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.