1
|
Milne RJ, Dibley KE, Bose J, Ashton AR, Ryan PR, Tyerman SD, Lagudah ES. Expression of the wheat multipathogen resistance hexose transporter Lr67res is associated with anion fluxes. PLANT PHYSIOLOGY 2023; 192:1254-1267. [PMID: 36806945 DOI: 10.1093/plphys/kiad104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/24/2023] [Accepted: 01/29/2023] [Indexed: 06/01/2023]
Abstract
Many disease resistance genes in wheat (Triticum aestivum L.) confer strong resistance to specific pathogen races or strains, and only a small number of genes confer multipathogen resistance. The Leaf rust resistance 67 (Lr67) gene fits into the latter category as it confers partial resistance to multiple biotrophic fungal pathogens in wheat and encodes a Sugar Transport Protein 13 (STP13) family hexose-proton symporter variant. Two mutations (G144R, V387L) in the resistant variant, Lr67res, differentiate it from the susceptible Lr67sus variant. The molecular function of the Lr67res protein is not understood, and this study aimed to broaden our knowledge on this topic. Biophysical analysis of the wheat Lr67sus and Lr67res protein variants was performed using Xenopus laevis oocytes as a heterologous expression system. Oocytes injected with Lr67sus displayed properties typically associated with proton-coupled sugar transport proteins-glucose-dependent inward currents, a Km of 110 ± 10 µM glucose, and a substrate selectivity permitting the transport of pentoses and hexoses. By contrast, Lr67res induced much larger sugar-independent inward currents in oocytes, implicating an alternative function. Since Lr67res is a mutated hexose-proton symporter, the possibility of protons underlying these currents was investigated but rejected. Instead, currents in Lr67res oocytes appeared to be dominated by anions. This conclusion was supported by electrophysiology and 36Cl- uptake studies and the similarities with oocytes expressing the known chloride channel from Torpedo marmorata, TmClC-0. This study provides insights into the function of an important disease resistance gene in wheat, which can be used to determine how this gene variant underpins disease resistance in planta.
Collapse
Affiliation(s)
- Ricky J Milne
- CSIRO, Agriculture and Food, Canberra, ACT 2601, Australia
| | | | - Jayakumar Bose
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, SA 5064, Australia
- School of Science, Western Sydney University, Richmond, NSW 2753, Australia
| | | | - Peter R Ryan
- CSIRO, Agriculture and Food, Canberra, ACT 2601, Australia
| | - Stephen D Tyerman
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, SA 5064, Australia
| | | |
Collapse
|
2
|
Rui P, Yang X, Xu S, Wang Z, Zhou X, Jiang L, Jiang T. FvZFP1 confers transgenic Nicotiana benthamiana resistance against plant pathogens and improves tolerance to abiotic stresses. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 316:111176. [PMID: 35151459 DOI: 10.1016/j.plantsci.2021.111176] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 10/22/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Zinc finger proteins can induce plant resistance and activate the expression of molecules involved in the resistance pathway in response to harsh environmental conditions. Previously, we found that a novel Fragaria vesca zinc finger protein interacts with the P6 protein encoded by a strawberry vein banding virus. However, the molecular mechanism of the zinc finger protein in plant stress resistance is still unknown. In this study, we reported the identification and functional characterization of the RING finger and CHY zinc finger domain-containing protein 1 (FvZFP1). The overexpression of FvZFP1 in Nicotiana benthamiana enhanced resistance to tobacco mosaic virus (TMV) and Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) infection by increasing ROS content. Additionally, FvZFP1 overexpression upregulated salicylic acid (SA) response-related gene expression as well as SA accumulation following TMV and Pst DC3000 infection. Furthermore, FvZFP1 overexpression resulted in increased salinity and drought stress tolerance by increasing SOD activity and decreasing MDA content. Overexpression of FvZFP1 also activated the ABA pathway under salinity or drought conditions. To our knowledge, this is the first study on the involvement of F. vesca zinc finger protein in crosstalk between biotic and abiotic stress signaling pathways, suggesting that FvZFP1 is a candidate gene for the improvement of resistance in response to multiple stresses.
Collapse
Affiliation(s)
- Penghuan Rui
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - Xianchu Yang
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - Shiqiang Xu
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - Zhanqi Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000, People's Republic of China
| | - Xueping Zhou
- State Key Laboratory for Plant Disease and Insect Pest, Institute of Plant Protection, China Academy of Agricultural Sciences, Beijing, 100193, People's Republic of China
| | - Lei Jiang
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China; Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China; Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China.
| | - Tong Jiang
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China; Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China; Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China.
| |
Collapse
|
3
|
McKay DW, McFarlane HE, Qu Y, Situmorang A, Gilliham M, Wege S. Plant Trans-Golgi Network/Early Endosome pH regulation requires Cation Chloride Cotransporter (CCC1). eLife 2022; 11:70701. [PMID: 34989335 PMCID: PMC8791640 DOI: 10.7554/elife.70701] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 01/05/2022] [Indexed: 01/04/2023] Open
Abstract
Plant cells maintain a low luminal pH in the trans-Golgi-network/early endosome (TGN/EE), the organelle in which the secretory and endocytic pathways intersect. Impaired TGN/EE pH regulation translates into severe plant growth defects. The identity of the proton pump and proton/ion antiporters that regulate TGN/EE pH have been determined, but an essential component required to complete the TGN/EE membrane transport circuit remains unidentified − a pathway for cation and anion efflux. Here, we have used complementation, genetically encoded fluorescent sensors, and pharmacological treatments to demonstrate that Arabidopsis cation chloride cotransporter (CCC1) is this missing component necessary for regulating TGN/EE pH and function. Loss of CCC1 function leads to alterations in TGN/EE-mediated processes including endocytic trafficking, exocytosis, and response to abiotic stress, consistent with the multitude of phenotypic defects observed in ccc1 knockout plants. This discovery places CCC1 as a central component of plant cellular function.
Collapse
Affiliation(s)
- Daniel W McKay
- School of Agriculture, Food and Wine, Waite Research Institute, ARC Centre of Excellence in Plant Energy Biology, University of Adelaide, Waite Campus, Adelaide, Australia
| | - Heather E McFarlane
- School of Biosciences, University of Melbourne, Melbourne, Australia.,Department of Cell and Systems Biology, University of Toronto, Toronto, Canada
| | - Yue Qu
- School of Agriculture, Food and Wine, Waite Research Institute, ARC Centre of Excellence in Plant Energy Biology, University of Adelaide, Waite Campus, Adelaide, Australia
| | - Apriadi Situmorang
- School of Agriculture, Food and Wine, Waite Research Institute, ARC Centre of Excellence in Plant Energy Biology, University of Adelaide, Waite Campus, Adelaide, Australia
| | - Matthew Gilliham
- School of Agriculture, Food and Wine, Waite Research Institute, ARC Centre of Excellence in Plant Energy Biology, University of Adelaide, Waite Campus, Adelaide, Australia
| | - Stefanie Wege
- School of Agriculture, Food and Wine, Waite Research Institute, ARC Centre of Excellence in Plant Energy Biology, University of Adelaide, Waite Campus, Adelaide, Australia
| |
Collapse
|