1995 Fiscal Year Final Research Report Summary
ROLE OF JASMONIC ACID IN DEFENSE MECHANISM OF RICE PLANT
| Project/Area Number |
06660421
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Applied molecular and cellular biology
|
|---|
| Research Institution | IBARAKI UNIBERSITY |
|---|
Principal Investigator |
KODAMA Osamu IBARAKI UNIVERSITY SCHOOLO OF AGRICULTURE PROFESSOR, 農学部, 教授 (00007791)
|
|---|
| Project Period (FY) |
1994 – 1995
|
| Keywords | jasmonic acid / rice / phytoalexin / elicitor / rice blast disease |
|---|
| Research Abstract |
Phytoalexins are antimicrobial secondary metabolites which accumulate in plants against fungal invasion. Their production is triggered not only by fungal inavasion, but also by a variety of elicitors. In rice plants, we have shown that CuCl_2 is a potent abiotic elicitor. Jasmonic acid has recently become known to play an important role in secondary metabolite production in plants at the cellilar level. This led us to speculate, inCuCl_2-elicited rice leaves, that JA might also play an important role as signal tranducer for phytoalexin production. The endogenous level of JA increased rapidly in CuCl_2-elicited rice leaves, and exogenously applied JA caused a large amount of phytoalexin production in rice leaves. This phytoalexin production by CuCl_2 decreased when rice leaves were treated with JA biosynthesis inhibitors, but that by JA did not. Ja is thus suggested to play an important role in the elicitation propcess leadind to phytoalexin production in rtice leaves.
|
