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tea_gl9871铜虫 (正式写手)
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[求助]
求高手翻译一下，自己虽然能看懂大概但不能用汉语准确表述。
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As part of an elaborate signaling system, the phloem translocation stream contains a large population of RNA molecules and proteins, suggesting that plants use mobile RNAs and proteins to integrate developmental processes at the whole-plant level. Because of the phloem’s involvement in the production and collection of signal molecules in source organs and in transporting and releasing them to sink organs, the phloem exhibits great potential to facilitate interorgan coordination and to mediate processes of development. This chapter focuses on three model systems as primary examples of noncell autonomous movement of protein or full-length mRNAs that impact plant development. The first example is the long-distance transport of FLOWERING LOCUS T (FT) protein to the apical shoot to induce flowering. The second example involves aRNA–protein complex of pumpkin (Cucurbita maxima) that moves CmGAI and other full-length mRNAs. In this system, a polypyrimidine tract-binding protein, designated CmRBP50, serves as the core RNA-binding protein in a phloem–mobile complex. The final example is the transport of Solanum tuberosum BEL5 (StBEL5) RNA from leaves to stolon tips to activate tuber formation in potato (Solanum tuberosum). StBEL5 is a transcription factor that functions in tandem with Knotted1-like proteins. These examples represent complex and dynamic phloem transport systems involving RNA–protein and protein–protein interactions that facilitate directed movement and maintain the integrity of the signal molecules. |
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nwsuafliu
木虫 (著名写手)
- 翻译EPI: 144
- 应助: 42 (小学生)
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- 注册: 2005-12-17
- 专业: 作物分子育种
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tea_gl9871: 金币+20, 翻译EPI+1, ★★★★★最佳答案, 你的强悍已不能用奖励表现，不知道能否跟你深度交流？谢谢！ 2013-01-04 08:59:40
tea_gl9871: 金币+20, 翻译EPI+1, ★★★★★最佳答案, 你的强悍已不能用奖励表现，不知道能否跟你深度交流？谢谢！ 2013-01-04 08:59:40
| 作为精巧信号系统的一部分，韧皮部运输流中含有大量RNA分子和蛋白质，说明植物在植株水平上利用可移动RNAs和蛋白来整合发育进程。由于韧皮部参与源器官中信号分子的产生和收集及其向库器官的运输和释放，韧皮部在促进器官间协调作用及介导发育进程方面发挥巨大的潜在作用。本章集中在3个模式系统上，作为影响植物发育的蛋白或全长mRNAs的非细胞自主移动的主要例子。第一个例子是开花位点（FT）蛋白向茎尖长距离运输诱导开花。第二个例子论及南瓜(Cucurbita maxima)中一个RNA-蛋白复合体移动CmGAI及其他全长mRNAs。该系统中，多聚嘧啶区结合蛋白CmRBP50是韧皮部移动复合体中核心的RNA结合蛋白。最后一个例子是马铃薯（Solanum tuberosum）BEL5(StBEL5)RNA从叶片向匍匐茎尖运输，激活马铃薯块茎形成。StBEL5是一个转录因子，和类Knotted1蛋白共同发挥作用。这些例子代表了复杂、动态的韧皮部运输系统，包括RNA-蛋白、蛋白-蛋白互作促进定向移动，并维持信号分子的完整性。 |
2楼2013-01-03 16:22:51
