A research on wounding-resistance inducing conditions in kelp sporophytes

2015 Fiscal Year Final Research Report

• Project/Area Number: 25450268
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aquatic bioproduction science
• Research Institution: Hokkaido University
• Principal Investigator: Mizuta Hiroyuki 北海道大学, 水産科学研究科(研究院), 教授 (00250499)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: コンブ / 赤色光 / 傷害 / リグニン / 静的抵抗性

Outline of Final Research Achievements

We tried to search the effective conditions to induce the wounding-resistance in the kelp, particularly Saccharina japonica sporophyte. As a result, it has been found that the irradiation of monochromatic red light induces the hardening in the young sporophytes. In addition, the monochromatic red light irradiation resulted in the increase of lignin-like substance content. The lignin-like compounds and high peroxidase activity were histochemically detected in the cell wall and the adjacent apoplast, particularly of the epidermal cells. Moreover, the monochromatic red light irradiation induced the production of radical oxygen species, which play an important role for the defense mechanism. These observations suggest that red light irradiation functions for the young sporophytes to give the wounding-resistance by hardening of the epidermal cell wall with the deposition of lignin-like substances catalyzed by hydrogen peroxide and peroxidase.

Free Research Field

海藻繁殖学