Abstract

Fusicoccin-A (FC-A) is a diterpene glucoside produced by a pathogenic fungus. Since its discovery, FC-A has been widely recognized as a phytotoxin that induces stomatal opening and leaf wilting, eventually leading to plant death. In this study, we present the first evidence that FC-A enhances plant growth by stabilizing the protein-protein interaction between plasma membrane (PM) H+-ATPase and 14-3-3 in guard cells. Long-term treatment of Arabidopsis plants with FC-A resulted in ~ 30% growth enhancement. Structurally similar fusicoccin-J (FC-J) showed a similar degree of growth-promotion activity as FC-A, whereas the more hydrophilic fusicoccin-H (FC-H) exhibited no effect on plant growth, indicating that the enhancement of plant growth observed with FC-A and FC-J involves upregulation of the protein-protein interaction between PM H+-ATPase and 14-3-3 in guard cells, which promotes stomatal opening and photosynthesis.

Details

Title
Fungal toxin fusicoccin enhances plant growth by upregulating 14-3-3 interaction with plasma membrane H+-ATPase
Author
Kiriyama, Hironaru 1 ; Kinoshita, Satoru N. 2 ; Hayashi, Yuki 2 ; Honda, Rikako 1 ; Kasuga, Shigemitsu 3 ; Kinoshita, Toshinori 4 ; Irieda, Hiroki 5 ; Ohkanda, Junko 5 

 Shinshu University, Graduate School of Science and Technology, Nagano, Japan (GRID:grid.263518.b) (ISNI:0000 0001 1507 4692) 
 Nagoya University, Graduate School of Science, Nagoya, Japan (GRID:grid.27476.30) (ISNI:0000 0001 0943 978X) 
 Shinshu University, Academic Assembly, Institute of Agriculture, Nagano, Japan (GRID:grid.263518.b) (ISNI:0000 0001 1507 4692) 
 Nagoya University, Graduate School of Science, Nagoya, Japan (GRID:grid.27476.30) (ISNI:0000 0001 0943 978X); Nagoya University, Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya, Japan (GRID:grid.27476.30) (ISNI:0000 0001 0943 978X) 
 Shinshu University, Academic Assembly, Institute of Agriculture, Nagano, Japan (GRID:grid.263518.b) (ISNI:0000 0001 1507 4692); Shinshu University, Interdisciplinary Cluster for Cutting Edge Research, Nagano, Japan (GRID:grid.263518.b) (ISNI:0000 0001 1507 4692) 
Pages
23431
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3114273827
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.