| Starch Mobilization in Ultradried Seed of Maize （Zea mays L.） During Germination |
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| 作者姓名： | Xiao-FengWANG Xin-MingJING JianLIN |
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| 作者单位： | [1]CollegeofBiology,BeijingForestryUniversity,Beijing100083,China／／InstituteofBotany,theChineseAcademyofSciences,Beijing100093,China [2]InstituteofBotany,theChineseAcademyofSciences,Beijing100093,China |
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| 摘 要： | The effects of ultradry storage on the starch mobilization in maize (Zea mays L.) seed after aging were investigated. The results indicated that there were no significant differences in the content of ATP, starch, and soluble sugar, as well as the activity of amylase, between ultradried seeds and seeds stored at -20℃ during germination. These results were consistent with the higher level of vigor of the ultradried seed. Sieve tube introduction of a fluorescence dye (carboxyl fluoresceindiacetate) and laser confocal microscopy were used to study the development of plasmodesmata in the ultradried seeds. The results indicated that plasmodesmata developed well in ultradried seeds. Fluorescence analysis also showed that the fluorescence intensity in the radicle of ultradried seeds was stronger than that in seeds with a higher moisture content. This suggests that ultradry treatment has no adverse effects on the seeds. After seed imbibition, cell orgaelles could be resumed. It is concluded that ultradry seed storage is beneficial for maintaining seed vigor and that starchy mobilization proceeds regularly during germination.
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| 关 键 词： | 玉米 淀粉活化 胞间连丝 种子发芽 ATP 种子库 |
Starch Mobilization in Ultradried Seed of Maize (Zea mays L.) During Germination |
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| Authors: | Xiao-Feng WANG Xin-Ming JING Jian LIN |
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| Institution: | College of Biology, Beijing Forestry University, Beijing 100083, China;;Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China |
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| Abstract: | Abstract: The effects of ultradry storage on the starch mobilization in maize ( Zea mays L.) seed after aging were investigated. The results indicated that there were no significant differences in the content of ATP, starch, and soluble sugar, as well as the activity of amylase, between ultradried seeds and seeds stored at ?20 °C during germination. These results were consistent with the higher level of vigor of the ultradried seed. Sieve tube introduction of a fluorescence dye (carboxyl fluoresceindiacetate) and laser confocal microscopy were used to study the development of plasmodesmata in the ultradried seeds. The results indicated that plasmodesmata developed well in ultradried seeds. Fluorescence analysis also showed that the fluorescence intensity in the radicle of ultradried seeds was stronger than that in seeds with a higher moisture content. This suggests that ultradry treatment has no adverse effects on the seeds. After seed imbibition, cell orgaelles could be resumed. It is concluded that ultradry seed storage is beneficial for maintaining seed vigor and that starchy mobilization proceeds regularly during germination.
(Managing editor: Ping HE) |
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| Keywords: | ATP germination maize (Zea mays L ) plasmodesmata starch mobilization ultradry seed storage |
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