Variations of the pathway of the transport of nutrition from the chalaza to the embryo through the endosperm in legume ovules (Angiospermae)

2017 Fiscal Year Final Research Report

• Project/Area Number: 26440205
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Ibaraki University
• Principal Investigator: Endo Yasuhiko 茨城大学, 理学部, 教授 (30250145)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 胚 / 被子植物 / マメ科 / 無胚乳種子 / 内乳 / 原形質連絡 / 胚柄 / クチクラ層

Outline of Final Research Achievements

I aim to know variations of the transferring pathways of the nutrition from the chalaza to the embryo through endosperm in the ovules of Leguminosae. Generally, the pathway was considered as follows; chalaza - endosperm - suspensor - embryo. However, the suspensor is lost by programmed cell death (PCD) at the early stage of the seed development. Therefore, I consider that the adnation between the two organs, i.e., embryo and endosperm, may be needed after the PCD. In order to know the adnating portion in legume ovules, I observed the ovules of 10 representative legume species (Gladitsia japonica, Caesalpinia decapetala, Albizia julibrissin, Cladrastis platycarpa, Maackia tashiroi, Euchresta japonica, Indigofera pseudotinctoria, Sesbania exaltata, and Lotus corniculatus) using a fluorescence microscope. I aim to detect the adnating portion by observing the loss of cuticular layer in the embryo. The layer was detected by the observation using the fluorescence microscope.

Free Research Field

植物分類学