Studies on the origin of angiosperms and the evolution of ovules

被子植物起源和胚珠进化的研究

• 批准号: 15370035
• 负责人: KATO Masahiro
• 金额: $ 9.47万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15370035/
• 关键词: angiosperm; ovule; carpel; outer integument; dorsiventrality; YABBY genes; INNER NO OUTER; evolution; INNER NO OUTER遺伝子; スイレン科; アンボレラ; 原始的被子植物

1.A morphological analysis of ovules of Magnolia grandiflora, Magnoliaceae, was performed in order to understand the morphology of the primitive ovule of angiosperms. The outer integument arose as a hood-shaped structure and then became cupular with an outgrowth arising on the funiculus between a gap in the integument. In the ovules of three families assigned to the primitive order Austrobaileyales, the outer integument is hood-shaed in Austrobaileya and Ttimernia, while it is copular in Illicium. Taking in account data of other primitive angiosperms and phylogenetic relationships of angiosperms, it is inferred that the primitive ovule is the anatropous one with the hood-shaped outer integument, which is similar to the lateral organ leaf.2.In order to better understand the homology of the ovule and that of the integument of primitive angiosperms at gene level, expression patterns were analyzed for homologues of genes of the YABBY family, which are involved in determination of the dorsiventrality of lateral organs. NaINO, an INO homologue, isolated from Nymphaea, Nymphaeaceae, was expressed in the outer layer of the outer integument. The result suggested that the outer integument may be a lateral organ homologous to the leaf. AmbF1, a YABBY2 homologue, isolated from Amborella, was expressed in the dorsal tissue of the leaf and the inner tissue of the carpet, patterns distinct from those of the advanced eudicot Arabidopsis thaliana, a model plant. These results are not in accordance with the widely accepted hypotheses that the carpel is a con duplicate leaf or an ascidiate structure derived from a peltate leaf.3.In conclusion, it is inferred the outer integument unique to angiosperms arose from a lateral organ such as the leaf and then diversified, and NaINO and AmbF1 homologous to YABBY family genes that govern the specificity of lateral organs evolved and their expression patterns changed in association with the origin and diversification of angiosperms.

1.进行了木兰宏伟的玉米菌科的形态分析，以了解被子植物原始胚珠的形态。外膜是作为引擎盖形结构的出现，然后变成杯子，在外皮中的间隙之间的ni曲子上产生了产物。在分配给原始秩序的奥贝亚莱尔人的三个家庭的胚珠中，外皮是在澳大利亚和ttimernia的hoodheha，而它在illicium中是相关的。考虑到其他原始的被子植物的数据数据和血管植物的系统发育关系，可以推断，原始的胚珠是带有引擎盖形外膜的解剖胚珠，这与横向器官相似。参与了确定侧向器官的背性。奈诺（Naino）是一种从若虫（Nymphaea）分离的INO同源物，在外膜外膜的外层中表达。结果表明，外膜可能是与叶子同源的横向器官。 AMBF1是一种从Amborella分离的Yabby2同源物，在叶子的背组织和地毯的内部组织中表达，与高级Eudicot拟南芥Thaliana（一种模型植物）不同。这些结果与被广泛接受的假设是conc的叶子或沿骨叶的升性结构的广泛接受的假设。3。结论，它可以推断出血管植物所独有的外在外皮是由侧面器官产生的。与被子植物的起源和多样化相关。

项目成果

Yamada, T., M.Ito, M.Kato: "Expression pattern of INNER NO OUTER homologue in Nymphaea (water lily family, Nymphaeaceae)."Dev.Genes Evol.. 213. 510-513 (2003)

Yamada, T., M.Ito, M.Kato：“Nymphaea（睡莲科，睡莲科）中 INNER NO OUTER 同源物的表达模式。”Dev.Genes Evol.. 213. 510-513 (2003)

Yamada, T., R.Imaichi, M.Kato: "The outer integument and funicular outgrowth complex in the ovule of Magnolia grandiflora (Magnoliaceae)."J.Plant Res.. 116. 189-198 (2003)

Yamada, T., R.Imaichi, M.Kato：“广玉兰（木兰科）胚珠中的外珠被和索状生长复合体。”J.Plant Res.. 116. 189-198 (2003)

Yamada, T., R.Imaichi, N.Prakash, M.Kato: "Developmental morphology of ovules and seeds of Austrobaileyales."Aust.J.Bot.. 51. 555-565 (2003)

Yamada, T., R.Imaichi, N.Prakash, M.Kato：“Austrobaileyales 胚珠和种子的发育形态。”Aust.J.Bot.. 51. 555-565 (2003)

YABBY2-homologue expression in lateral organs of Amborella trichopoda (Amborellaceae)

YABBY2-同源物在毛足安博氏菌（Amborellaceae）侧器官中的表达

• 发表时间: 2004
• 期刊: Int.J.Plant Sci. 165
• 作者: Yamada;T.
• 通讯作者: T.