Hybrid embryos of Vicia faba develop enhanced sink strength, which is established during early development.
Hybrid embryos of Vicia faba develop enhanced sink strength, which is established during early development.
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蚕豆杂交胚胎具有增强的库强度，这是在早期发育过程中建立的
DOI：
10.1111/j.1365-313x.2010.04450.x
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Weber H
中科院分区：
文献类型：
--
作者：
Meitzel T;Radchuk R;Link W;Weschke W;Weber H
以两个纯合蚕豆的自交和杂交种子为模型，分析了胚胎杂种优势的生理和分子机制。为了比较正反交和自交种子在同一母本上生长的方式，对发育中的胚胎的转录物、代谢物和种子含量进行了分析。成熟杂交种的平均重量明显较高，表现出中亲优势。杂交胚胎表现出较长的早期发育和延迟的贮藏活性。因此，转录图谱表明刺激细胞增殖，这是一种潜在的通过激活生长相关转录因子框架内的生长素功能来调节的效果。在转录水平上，激活的细胞增殖增加了同化物的吸收活性，从而提高了种子的库容量。这种情况可能最终导致杂交种子的大小增加。我们得出结论，杂交种子的特征是在早期发育过程中生长加速，从而增加了储藏能力，并导致了更高的代谢通量。这些需求至少部分由同化物吸收能力的提高来满足。杂交种子的刺激生长改变了代谢物的分布，潜在地耗尽了可用的库。这种代谢变化很可能是由于杂交种子较高的储藏能力而产生的次要影响，这是一种杂种优势特征，本身在种子发育的很早就建立了。
Selfed and crossed seeds of two homozygousVicia fabalines served as models for the analysis of the physiological and molecular mechanisms underlying embryo heterosis. Profiles of transcripts, metabolites and seed contents of developing embryos were analysed to compare the means of reciprocally crossed and selfed seeds growing on the same mother plants. The mean weight of mature hybrid seeds was demonstrably higher, revealing mid‐parent heterosis. Hybrid embryos exhibited a prolonged early phase of development and delayed onset of storage activity. Accordingly, transcript profiling indicates stimulation of cell proliferation, an effect, which is potentially mediated by activation of auxin functions within a framework of growth‐related transcription factors. At the transcript level, activated cell proliferation increased assimilate uptake activity and thereby seed sink strength. This situation might finally lead to the increased size of the hybrid seeds. We conclude that hybrid seeds are characterised by accelerated growth during early development, which increases storage capacity and leads to higher metabolic fluxes. These needs are, at least partially, met by increased assimilate uptake capacity. The stimulated growth of hybrid seeds shifted metabolite profiles and potentially depleted available pools. Such metabolic shifts are most likely secondary effects resulting from the higher storage capacity of hybrid seeds, a heterotic feature, which is itself established very early in seed development.
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影响因子：
14.9
作者：
Singh, Dharmendra Kumar;Islam, Mohammad Nurul;Choudhury, Nirupam Roy;Karjee, Sumona;Mukherjee, Sunil Kumar
通讯作者：
Mukherjee, Sunil Kumar
DOI：
10.1111/j.1365-313x.2010.04145.x
发表时间：
2010-04
期刊：
The Plant journal : for cell and molecular biology
影响因子：
--
作者：
Rozhon W;Mayerhofer J;Petutschnig E;Fujioka S;Jonak C
通讯作者：
Jonak C
叶绿体外膜蛋白 OEP16* 成孔区域的鉴定
DOI：
10.1074/jbc.275.16.11758
发表时间：
2000
期刊：
The Journal of Biological Chemistry
影响因子：
--
作者：
T. Steinkamp;K. Hill;S. Hinnah;R. Wagner;T. Röhl;K. Pohlmeyer;J. Soll
通讯作者：
J. Soll
DOI：
10.1073/pnas.0607940104
发表时间：
2007-02-13
影响因子：
11.1
作者：
Tsukagoshi, Hironaka;Morikami, Atsushi;Nakamura, Kenzo
通讯作者：
Nakamura, Kenzo
影响因子：
4.3
作者：
H. Rolletschek;M. Hajirezaei;U. Wobus;H. Weber
通讯作者：
H. Rolletschek;M. Hajirezaei;U. Wobus;H. Weber