Abstract
Maize cultivar zhengdan958 was selected as materials. The sub-cellular distribution of soluble calcium at different phases was shown by the potassium-pyroantinonate-precipitation method and transmission electron microscopy. The results showed that the deposits of calcium antimonate as the indicator for Ca(2+) localization were mainly concentrated within the vacuoles and intercellular spaces without PEG treatment. Firstly, when the leaf was treated with PEG, the Ca(2+) level increased remarkably in the cytoplasm, but considerably decreased in vacuoles and intercellular gaps. Meanwhile, the level of Ca(2+) also increased in chloroplast and nucleus. When the treatment continued, the level of Ca(2+) in chloroplasts and nucleus continued to increase and some cells and chloroplasts finally disintegrated, showing that there is a relationship between the distribution of Ca(2+) and the super-microstructure of cells. Ca(2+) plays a role in the plant drought resistance. The changes of cytosolic Ca(2+) localization in cells treated by ABA, EGTA, Verapamil and TFP were investigated too. The increase of cytosolic calcium induced by ABA was mainly caused by calcium influx. Calmodulin participated in ABA signal transduction, which was indicated by the variation of cytosolic Ca(2+)/CaM concentration change induced by ABA. The above results provided a direct evidence for calcium ion as an important signal at the experimental cellular level.
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Claims 9
Claim · model-written summary
Without PEG, calcium antimonate deposits were mainly in vacuoles and intercellular spaces.
- Material
- zhengdan958e1
- Organ / stage
- vacuoles and intercellular spacese0
- Outcome
- deposits of calcium antimonatee0
- Qualifier
- without PEG treatmente0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“deposits of calcium antimonate as the indicator for Ca(2+) localization were mainly concentrated within the vacuoles and intercellular spaces without PEG treatment”
t0“maize leaflets under drought stress”
e1“Maize cultivar zhengdan958 was selected as materials”
Claim · model-written summary
PEG increased cytoplasmic Ca(2+).
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the leaf was treated with PEG, the Ca(2+) level increased remarkably in the cytoplasm”
t0“maize leaflets under drought stress”
Claim · model-written summary
PEG decreased vacuolar and intercellular Ca(2+).
- Organ / stage
- vacuoles and intercellular gapse0
- Treatment
- PEGe1
- Outcome
- Ca(2+) levele1
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but considerably decreased in vacuoles and intercellular gaps”
t0“maize leaflets under drought stress”
e1“when the leaf was treated with PEG, the Ca(2+) level increased remarkably in the cytoplasm”
Claim · model-written summary
PEG increased chloroplast and nuclear Ca(2+).
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the level of Ca(2+) also increased in chloroplast and nucleus”
t0“maize leaflets under drought stress”
e1“when the leaf was treated with PEG, the Ca(2+) level increased remarkably in the cytoplasm”
Claim · model-written summary
With continued treatment, chloroplast and nuclear Ca(2+) continued rising.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the level of Ca(2+) in chloroplasts and nucleus continued to increase”
t0“maize leaflets under drought stress”
Claim · model-written summary
Some cells and chloroplasts disintegrated after continued treatment.
- Outcome
- cells and chloroplasts finally disintegratede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some cells and chloroplasts finally disintegrated”
t0“maize leaflets under drought stress”
Claim · model-written summary
The authors associated Ca(2+) distribution with cell ultrastructure.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is a relationship between the distribution of Ca(2+) and the super-microstructure of cells”
t0“maize leaflets under drought stress”
Claim · model-written summary
ABA-induced cytosolic calcium increase was mainly caused by calcium influx.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase of cytosolic calcium induced by ABA was mainly caused by calcium influx”
t0“maize leaflets under drought stress”
Claim · model-written summary
Calmodulin participated in ABA signal transduction according to cytosolic Ca(2+)/CaM changes.
- Treatment
- ABAe0
- Gene
- Calmoduline0
- Outcome
- ABA signal transductione0
- Qualifier
- variation of cytosolic Ca(2+)/CaM concentration changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calmodulin participated in ABA signal transduction, which was indicated by the variation of cytosolic Ca(2+)/CaM concentration change induced by ABA”
t0“maize leaflets under drought stress”
The same questions in other papers
drought · nutrient: content · Zea mays (maize)Results differ
10 papers in the same direction as this paper · 27 in the opposite direction
- negative
- negative
- negative
34 papers more in this group
See all 38 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.