Abstract
【Objective】The maize embryos at 20, 24 and 32 days after pollination (DAP) were used as experimental materials to investigate the effects of different drying rates on antioxidant system. 【Method】Based on conventional planting,the corn was pollinated artificially and bagged After 20, 24 and 32 days, the embryos were picked and performed slow and fast dehydration experiments to detect the physiological indices of intact embryos. 【Result】The results showed that maize seeds with longer bagging time exhibited slower dehydration rate decreasing under slow dehydration. Under slow dehydration, the embryos had higher survival rate and lower relative electrolytic leakage rate. Under fast dehydration, the embryos at the three stages had higher MDA content and higher activities of GR and DHAR, while the AsA content was too low to be detected. GSH contents were high both in 20 DAP embryos for fast-dehydration and in 32 DAP embryos for slow dehydra-tion. In 24 DAP embryos, no significant difference was observed between the two dehydration rates. 【Conclusion】Compared with fast dehydration, maize embryo was more tolerant to slow dehydration, which had less harm on corn embryo. GSH played a dominant role in desiccation tolerance of maize embryo.
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Claims 11
Claim · model-written summary
Longer bagging time was associated with slower dehydration under slow dehydration.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize seeds with longer bagging time exhibited slower dehydration rate decreasing under slow dehydration”
Claim · model-written summary
Slow dehydration yielded higher embryo survival.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under slow dehydration, the embryos had higher survival rate and lower relative electrolytic leakage rate”
t0“maize”
Claim · model-written summary
Slow dehydration yielded lower relative electrolytic leakage.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under slow dehydration, the embryos had higher survival rate and lower relative electrolytic leakage rate”
t0“maize”
Claim · model-written summary
Fast dehydration increased MDA content at all three stages.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under fast dehydration, the embryos at the three stages had higher MDA content and higher activities of GR and DHAR”
t0“maize”
Claim · model-written summary
Fast dehydration increased GR and DHAR activities at all three stages.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under fast dehydration, the embryos at the three stages had higher MDA content and higher activities of GR and DHAR”
t0“maize”
Claim · model-written summary
AsA content under fast dehydration was too low to detect.
- Outcome
- AsA contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the AsA content was too low to be detected”
t0“maize”
Claim · model-written summary
GSH contents were high in fast-dehydrated 20 DAP embryos.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GSH contents were high both in 20 DAP embryos for fast-dehydration and in 32 DAP embryos for slow dehydra-tion”
t0“maize”
Claim · model-written summary
GSH contents were high in slow-dehydrated 32 DAP embryos.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GSH contents were high both in 20 DAP embryos for fast-dehydration and in 32 DAP embryos for slow dehydra-tion”
t0“maize”
Claim · model-written summary
At 24 DAP, the dehydration rates produced no significant difference.
- Treatment
- two dehydration ratese0
- Outcome
- differencee0
- Direction
- no significant differencee0
- Comparator
- two dehydration ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 24 DAP embryos, no significant difference was observed between the two dehydration rates”
t0“maize”
Claim · model-written summary
Maize embryos were more tolerant of slow than fast dehydration.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with fast dehydration, maize embryo was more tolerant to slow dehydration”
Claim · model-written summary
The authors attributed maize embryo desiccation tolerance chiefly to GSH.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GSH played a dominant role in desiccation tolerance of maize embryo”
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