2011 Fiscal Year Final Research Report
An analysis of the diversity of developmental patterns of leguminous embryos
| Project/Area Number |
21570087
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Ibaraki University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 子葉紋 / 内乳 / 胚 / 胚嚢 / 胚柄 / 被子植物 / マメ科 / 有胚植物 |
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| Research Abstract |
Angiosperm suspensors function at early stages of embryogenesis by holding the growing embryo in a fixed position, and providing a route for nutrients transport to the embryo proper. The suspensors develop fully, before the cotyledons initiate, and degenerate subsequently, i.e., the suspensors are subject to programmed cell-death (PCD) before the maturation of embryos. In the present study, a comparative study of the embryo and suspensor development of 66 leguminous species was done using paraffin sectioning method. As the results, I found two types of suspensors, i.e., longer-lived one and shorter-lived one. The longer-lived ones persist at least until the early cotyledon stage, and the shorter-lived ones separate from the wall of the embryo sac or disappear at the early cotyledon stage. The evolutional polarity of leguminous suspensors would be that from the longer-lived one to the shorter-lived one. After PCD of shorter-lived suspensors, their functions would be taken over by another tissue.
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Research Products
(5 results)
