| |
|
|
| |
|
|
Research  |
|
|
|
| |
| |
Vitamin B1 Functions as an Activator of Plant
|
|
|
|
|
|
| |
|
 Authours
|
Il-Pyung Ahn, Soonok Kim, and Yong-Hwan Lee |
| Title |
Vitamin B1 Functions as an Activator of Plant |
| Journal |
Plant Physiology, 2005 (138) ~ |
Abstract
|
Vitamin B1 (thiamine) is an essential nutrient for humans. Vitamin B1 deficiency causes beriberi, which disturbs the central nervous and circulatory systems. In countries in which rice (Oryza sativa) is a major food, thiamine deficiency is prevalent because polishing of rice removes most of the thiamine in the grain. We demonstrate here that thiamine, in addition to its
nutritional value, induces systemic acquired resistance (SAR) in plants. Thiamine-treated rice, Arabidopsis (Arabidopsis thaliana), and vegetable crop plants showed resistance to fungal, bacterial, and viral infections. Thiamine treatment induces the
transient expression of pathogenesis-related (PR) genes in rice and other plants. In addition, thiamine treatment potentiates stronger and more rapid PR gene expression and the up-regulation of protein kinase C activity. The effects of thiamine on
disease resistance and defense-related gene expression mobilize systemically throughout the plant and last for more than 15 dafter treatment. Treatment of Arabidopsis ecotype Columbia-0 plants with thiamine resulted in the activation of PR-1 but not
PDF1.2. Furthermore, thiamine prevented bacterial infection in Arabidopsis mutants insensitive to jasmonic acid or ethylene but not in mutants impaired in the SAR transduction pathway. These results clearly demonstrate that thiamine induces SAR in
plants through the salicylic acid and Ca21-related signaling pathways. The findings provide a novel paradigm for developing alternative strategies for the control of plant diseases. |
Link
|
 |
|
|
| |
|
|
|
|
| |
|
|
|
|
