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Agrobacterium expressing a type III secretion system delivers Pseudomonas effectors into plant cells to enhance transformation

Agriculture

Agrobacterium expressing a type III secretion system delivers Pseudomonas effectors into plant cells to enhance transformation

V. Raman, C. M. Rojas, et al.

This groundbreaking research conducted by Vidhyavathi Raman, Clemencia M. Rojas, and their team engineered Agrobacterium tumefaciens to enhance plant transformation efficiency significantly. By incorporating a type III secretion system, they achieved remarkable increases in the transformation of wheat, alfalfa, and switchgrass, along with successful delivery of plant proteins, paving the way for advancements in agricultural biotechnology.

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Playback language: English
Abstract
Agrobacterium-mediated plant transformation (AMT) is a cornerstone of modern plant biotechnology. However, many plant species/varieties are recalcitrant to Agrobacterium infection due to elicited plant defense responses. This study engineered Agrobacterium tumefaciens to express a type III secretion system (T3SS) from Pseudomonas syringae, delivering effectors AvrPto, AvrPtoB, or HopAO1 to suppress host defenses. This resulted in a ~250–400% increase in AMT of wheat, alfalfa, and switchgrass. The engineered A. tumefaciens also successfully delivered the plant protein histone H2A-1, further enhancing AMT. This approach has significant implications for basic research and agricultural biotechnology, enabling transformation of recalcitrant species and non-transgenic protein delivery into plant cells.
Publisher
Nature Communications
Published On
May 11, 2022
Authors
Vidhyavathi Raman, Clemencia M. Rojas, Balaji Vasudevan, Kevin Dunning, Jaydeep Kolape, Sunhee Oh, Jianfei Yun, Lishan Yang, Guangming Li, Bikram D. Pant, Qingzhen Jiang, Kirankumar S. Mysore
Tags
Agrobacterium
plant transformation
biotechnology
type III secretion system
wheat
alfalfa
switchgrass

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