Vacuoles and Plant Defense

Iglesias, Alejandro; Meins, Fred

doi:10.1002/9781119312994.apr0040

Annual Plant Reviews Online 2018

DOI: 10.1002/9781119312994.apr0040

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Vacuoles and Plant Defense

Alejandro Iglesias

Fred Meins

Abstract: The sections in this article are Introduction Phytoanticipins and Phytoalexins Pathogenesis‐Related ( PR ) Proteins Post‐Translational Modification, Intracellular Transport and Vacuolar Targeting of PR Proteins Biotechnological Applications … Show more

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“…Vacuoles play important roles in plant immunity (for review, see Iglesias and Meins, 2000;Hatsugai and Hara-Nishimura, 2010). The vacuole, which typically occupies most of the plant cell volume, contains immune-related proteins that are used against invading pathogens, as well as hydrolases and lipases that degrade cellular materials that are no longer required.…”

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Involvement of Adapter Protein Complex 4 in Hypersensitive Cell Death Induced by Avirulent Bacteria

et al. 2017

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Plant immunity to avirulent bacterial pathogens is associated with subcellular membrane dynamics including fusion between the vacuolar and plasma membranes, resulting in hypersensitive cell death. Here, we report that ADAPTOR PROTEIN COMPLEX-4 (AP-4) subunits are involved in plant immunity associated with hypersensitive cell death. We isolated a mutant with a defect in resistance to an avirulent strain of Pseudomonas syringae pv. tomato (Pto) DC3000 avrRpm1 from a vacuolar protein sorting mutant library of Arabidopsis (Arabidopsis thaliana). The mutant was identical to gfs4-1, which has a mutation in the gene encoding the AP-4 subunit AP4B. Thus, we focused on AP4B and another subunit, AP4E. All of the mutants (ap4b-3, ap4b-4, ap4e-1, and ap4e-2) were defective in hypersensitive cell death and resistance to Pto DC3000 with the type III effector AvrRpm1 or AvrRpt2, both of which are recognized on the plasma membrane, while they showed slightly enhanced susceptibility to the type-III-secretion-deficient P. syringae strain hrcC. On the other hand, both ap4b-3 and ap4b-4 showed no defect in resistance to Pto DC3000 with the type III effector AvrRps4, which is recognized in the cytosol and does not induce hypersensitive cell death. Upon infection with Pto DC3000 avrRpt2, the ap4b-3 and ap4b-4 leaf cells did not show fusion between vacuolar and plasma membranes, whereas the wild-type leaf cells did. These results suggest that AP-4 contributes to cell death-associated immunity, possibly via membrane fusion, after type III effector-recognition on the plasma membrane.

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Involvement of Adapter Protein Complex 4 in Hypersensitive Cell Death Induced by Avirulent Bacteria

et al. 2017

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Vacuoles and Plant Defense

Abstract: The sections in this article are Introduction Phytoanticipins and Phytoalexins Pathogenesis‐Related ( PR ) Proteins Post‐Translational Modification, Intracellular Transport and Vacuolar Targeting of PR Proteins Biotechnological Applications … Show more

Cited by 1 publication

References 161 publications

Involvement of Adapter Protein Complex 4 in Hypersensitive Cell Death Induced by Avirulent Bacteria

Involvement of Adapter Protein Complex 4 in Hypersensitive Cell Death Induced by Avirulent Bacteria

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