Seeds: Biology, Development and Ecology
Desiccation tolerance (DT), or the capacity to survive nearly complete drying, is considered to be a multifactorial trait, involving the protection of macromolecules against water removal and regulation of the metabolism to prevent oxidative stress and the production of by-products to toxic level...
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| Ngôn ngữ: | English |
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CABI
2014
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oai:scholar.dlu.edu.vn:DLU123456789-364172023-11-11T05:21:20Z Seeds: Biology, Development and Ecology Adkins, Steve W Ashmore, Sarah E Navie, Sheldon C Ecology Biology Desiccation tolerance (DT), or the capacity to survive nearly complete drying, is considered to be a multifactorial trait, involving the protection of macromolecules against water removal and regulation of the metabolism to prevent oxidative stress and the production of by-products to toxic levels. To obtain a general overview of the processes, molecules and regulating pathways involved in the acquisition of DT, transcriptome profiling was carried out on desiccation-tolerant and desiccation-sensitive stages of Medicago truncatula Gaertn. seeds using 16K microarrays. In order to discriminate DT from other developmental pathways, differences in gene expression were determined for two different stages: (i) between desiccation-sensitive embryos at 14 days after pollination (DAP) and those that had acquired their DT at 20 DAP; and (ii) between desiccation-sensitive radicles of germinated seeds and radicles of those germinated seeds that had received an osmotic treatment, resulting in the re-establishment of DT. Functional analysis of genes that were at least twofold upregulated or downregulated in both desiccation-tolerant stages revealed that the main groups containing upregulated genes belonged to defence and seed storage reserves. Groups containing typically downregulated genes were those involved in cell cycle and DNA processing as well as primary and energy metabolism. The main findings are discussed and compared with other desiccation-tolerant organisms. 2014-03-05T01:54:06Z 2014-03-05T01:54:06Z 2007 Book 978 1 84593 197 1 https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/36417 en application/pdf CABI |
| institution |
Thư viện Trường Đại học Đà Lạt |
| collection |
Thư viện số |
| language |
English |
| topic |
Ecology Biology |
| spellingShingle |
Ecology Biology Adkins, Steve W Ashmore, Sarah E Navie, Sheldon C Seeds: Biology, Development and Ecology |
| description |
Desiccation tolerance (DT), or the capacity to survive nearly complete drying, is considered
to be a multifactorial trait, involving the protection of macromolecules against water
removal and regulation of the metabolism to prevent oxidative stress and the production of
by-products to toxic levels. To obtain a general overview of the processes, molecules and
regulating pathways involved in the acquisition of DT, transcriptome profiling was carried
out on desiccation-tolerant and desiccation-sensitive stages of Medicago truncatula Gaertn.
seeds using 16K microarrays. In order to discriminate DT from other developmental pathways,
differences in gene expression were determined for two different stages: (i) between
desiccation-sensitive embryos at 14 days after pollination (DAP) and those that had acquired
their DT at 20 DAP; and (ii) between desiccation-sensitive radicles of germinated seeds and
radicles of those germinated seeds that had received an osmotic treatment, resulting in the
re-establishment of DT. Functional analysis of genes that were at least twofold upregulated
or downregulated in both desiccation-tolerant stages revealed that the main groups containing
upregulated genes belonged to defence and seed storage reserves. Groups containing
typically downregulated genes were those involved in cell cycle and DNA processing as well
as primary and energy metabolism. The main findings are discussed and compared with
other desiccation-tolerant organisms. |
| format |
Book |
| author |
Adkins, Steve W Ashmore, Sarah E Navie, Sheldon C |
| author_facet |
Adkins, Steve W Ashmore, Sarah E Navie, Sheldon C |
| author_sort |
Adkins, Steve W |
| title |
Seeds: Biology,
Development and
Ecology |
| title_short |
Seeds: Biology,
Development and
Ecology |
| title_full |
Seeds: Biology,
Development and
Ecology |
| title_fullStr |
Seeds: Biology,
Development and
Ecology |
| title_full_unstemmed |
Seeds: Biology,
Development and
Ecology |
| title_sort |
seeds: biology,
development and
ecology |
| publisher |
CABI |
| publishDate |
2014 |
| url |
https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/36417 |
| _version_ |
1819798222718107648 |