Abstract
Changes in desiccation tolerance of isolated maize embryos and effect of drying rate on embryo desiccation tolerance were discussed in this paper.The maize embryos could tolerate a slight dehydration after they were pollinated for 16 days.When water content descended from 1.45 to 0.28?g H_2O g -1 DW,embryo germination was 100%,whereas embryos died when their water content were less than 0.1?g H_2O g -1 DW.The embryo desiccation tolerance increased gradually in accordance with its development,which presented as the electrolyte leakage decreasing and the germination and dry weight of seedlings increasing.At 20 days after pollination (DAP),the superoxide dismutase (SOD) and the ascorbate peroxidase (APX) were relatively more active than that of 24 DAP,which was opposite to catalase (CAT).The malonylaldehyde (MDA) content showed a tendency of declining in the course of seed development.Different drying rate had an obvious influence on desiccation tolerance.When water content decreased to 0.1-0.18?g H_2O g -1 DW at a slow speed of dehydration,embryo germination and dry weight of seedlings were higher than that of rapid dehydration,but electrolyte leakage was lower.The SOD,APX activities and MDA content in the condition of rapid dehydration were higher than that of slow dehydration.The changes of CAT activities are not evident.
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Claims 13
Claim · model-written summary
Maize embryos tolerated slight dehydration 16 days after pollination.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maize embryos could tolerate a slight dehydration after they were pollinated for 16 days.”
t0“Maize Embryos”
Claim · model-written summary
Embryos germinated fully after dehydration from 1.45 to 0.28?g H_2O g -1 DW.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When water content descended from 1.45 to 0.28?g H_2O g -1 DW,embryo germination was 100%”
t0“Maize Embryos”
Claim · model-written summary
Embryos died below 0.1?g H_2O g -1 DW.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“embryos died when their water content were less than 0.1?g H_2O g -1 DW”
t0“Maize Embryos”
Claim · model-written summary
Embryo desiccation tolerance increased with development.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“embryo desiccation tolerance increased gradually in accordance with its development”
t0“Maize Embryos”
Claim · model-written summary
Electrolyte leakage decreased as embryo tolerance developed.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“electrolyte leakage decreasing”
t0“Maize Embryos”
Claim · model-written summary
Seedling germination and dry weight increased with embryo development.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination and dry weight of seedlings increasing”
t0“Maize Embryos”
Claim · model-written summary
SOD and APX were more active at 20 than 24 DAP.
- Gene
- superoxide dismutase (SOD) and the ascorbate peroxidase (APX)e0
- Outcome
- more activee0
- Comparator
- 24 DAPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 20 days after pollination (DAP),the superoxide dismutase (SOD) and the ascorbate peroxidase (APX) were relatively more active than that of 24 DAP”
t0“Maize Embryos”
Claim · model-written summary
CAT showed the opposite activity pattern from SOD and APX.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which was opposite to catalase (CAT)”
t0“Maize Embryos”
Claim · model-written summary
MDA content declined during seed development.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The malonylaldehyde (MDA) content showed a tendency of declining in the course of seed development.”
t0“Maize Embryos”
Claim · model-written summary
Slow drying gave higher embryo germination and seedling dry weight than rapid drying.
- Treatment
- dehydratione0
- Outcome
- embryo germination and dry weight of seedlingse0
- Direction
- highere0
- Comparator
- rapid dehydratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“embryo germination and dry weight of seedlings were higher than that of rapid dehydration”
t0“Maize Embryos”
Claim · model-written summary
Slow drying gave lower electrolyte leakage than rapid drying.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but electrolyte leakage was lower”
t0“Maize Embryos”
Claim · model-written summary
Rapid drying produced higher SOD and APX activity and MDA content than slow drying.
- Treatment
- rapid dehydratione0
- Outcome
- SOD,APX activities and MDA contente0
- Direction
- highere0
- Comparator
- slow dehydratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SOD,APX activities and MDA content in the condition of rapid dehydration were higher than that of slow dehydration.”
t0“Maize Embryos”
Claim · model-written summary
CAT activity change was not evident.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The changes of CAT activities are not evident.”
t0“Maize Embryos”
The same questions in other papers
drought · growth · Zea mays (maize)Positive and negative results
76 papers in the same direction as this paper · 306 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- negative
381 papers more in this group
See all 385 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.