PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance

Increases in pathogenesis-related (PR) transcripts are commonly interpreted as evidence of plants' resistance responses to pathogens; however, few studies have examined whether increases in PR proteins protect plants growing under natural conditions. Pseudomonas syringae pv. tomato DC3000, whic...
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Autor*in:	Cbgowda Rayapuram [verfasserIn] Jianqiang Wu [verfasserIn] Christiane Haas [verfasserIn] Ian T. Baldwin [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2008

Übergeordnetes Werk:	In: Molecular Plant-Microbe Interactions - The American Phytopathological Society, 2021, 21(2008), 7, Seite 988-1000
Übergeordnetes Werk:	volume:21 ; year:2008 ; number:7 ; pages:988-1000

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.1094/MPMI-21-7-0988

Katalog-ID:	DOAJ077856589

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520			\|a Increases in pathogenesis-related (PR) transcripts are commonly interpreted as evidence of plants' resistance responses to pathogens; however, few studies have examined whether increases in PR proteins protect plants growing under natural conditions. Pseudomonas syringae pv. tomato DC3000, which is virulent and causes disease in Arabidopsis, is also pathogenic to the native tobacco Nicotiana attenuata. N. attenuata responds to P. syringae pv. tomato DC3000's challenges with increases in salicylic acid and transcripts of at least two PR genes, PR-1 and PR13/Thionin. To determine if either of these PR proteins functions in bacterial resistance, we independently silenced both genes by RNAi and found that only PR-13/Thionin mediates resistance to P. syringae pv. tomato DC3000 in glasshouse experiments. When NaPR-1- and NaThionin-silenced plants were transplanted into the plant's native habitat in the Great Basin Desert of Utah, opportunistic Pseudomonas spp. performed better on NaThionin-silenced plants compared with NaPR-1-silenced and wild-type (WT) plants, and accounted for increased plant mortality. The native herbivore community of N. attenuata attacked both NaPR-1- and PR-13/NaThionin-silenced plants to the same degree as it did in WT plants, indicating that neither PR protein provides resistance to herbivores. Although PR-1 is generally considered a marker gene of disease resistance, we found no evidence that it has an antimicrobial function. In contrast, PR-13/NaThionin is clearly an ecologically relevant defense protein involved in resisting pathogens in N. attenuata.
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callnumber-first	Q - Science
author	Cbgowda Rayapuram
spellingShingle	Cbgowda Rayapuram misc QR1-502 misc QK1-989 misc Microbiology misc Botany PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance
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topic_title	QR1-502 QK1-989 PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance
topic	misc QR1-502 misc QK1-989 misc Microbiology misc Botany
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title	PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance
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title_full	PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance
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title_sort	pr-13/thionin but not pr-1 mediates bacterial resistance in nicotiana attenuata in nature, and neither influences herbivore resistance
callnumber	QR1-502
title_auth	PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance
abstract	Increases in pathogenesis-related (PR) transcripts are commonly interpreted as evidence of plants' resistance responses to pathogens; however, few studies have examined whether increases in PR proteins protect plants growing under natural conditions. Pseudomonas syringae pv. tomato DC3000, which is virulent and causes disease in Arabidopsis, is also pathogenic to the native tobacco Nicotiana attenuata. N. attenuata responds to P. syringae pv. tomato DC3000's challenges with increases in salicylic acid and transcripts of at least two PR genes, PR-1 and PR13/Thionin. To determine if either of these PR proteins functions in bacterial resistance, we independently silenced both genes by RNAi and found that only PR-13/Thionin mediates resistance to P. syringae pv. tomato DC3000 in glasshouse experiments. When NaPR-1- and NaThionin-silenced plants were transplanted into the plant's native habitat in the Great Basin Desert of Utah, opportunistic Pseudomonas spp. performed better on NaThionin-silenced plants compared with NaPR-1-silenced and wild-type (WT) plants, and accounted for increased plant mortality. The native herbivore community of N. attenuata attacked both NaPR-1- and PR-13/NaThionin-silenced plants to the same degree as it did in WT plants, indicating that neither PR protein provides resistance to herbivores. Although PR-1 is generally considered a marker gene of disease resistance, we found no evidence that it has an antimicrobial function. In contrast, PR-13/NaThionin is clearly an ecologically relevant defense protein involved in resisting pathogens in N. attenuata.
abstractGer	Increases in pathogenesis-related (PR) transcripts are commonly interpreted as evidence of plants' resistance responses to pathogens; however, few studies have examined whether increases in PR proteins protect plants growing under natural conditions. Pseudomonas syringae pv. tomato DC3000, which is virulent and causes disease in Arabidopsis, is also pathogenic to the native tobacco Nicotiana attenuata. N. attenuata responds to P. syringae pv. tomato DC3000's challenges with increases in salicylic acid and transcripts of at least two PR genes, PR-1 and PR13/Thionin. To determine if either of these PR proteins functions in bacterial resistance, we independently silenced both genes by RNAi and found that only PR-13/Thionin mediates resistance to P. syringae pv. tomato DC3000 in glasshouse experiments. When NaPR-1- and NaThionin-silenced plants were transplanted into the plant's native habitat in the Great Basin Desert of Utah, opportunistic Pseudomonas spp. performed better on NaThionin-silenced plants compared with NaPR-1-silenced and wild-type (WT) plants, and accounted for increased plant mortality. The native herbivore community of N. attenuata attacked both NaPR-1- and PR-13/NaThionin-silenced plants to the same degree as it did in WT plants, indicating that neither PR protein provides resistance to herbivores. Although PR-1 is generally considered a marker gene of disease resistance, we found no evidence that it has an antimicrobial function. In contrast, PR-13/NaThionin is clearly an ecologically relevant defense protein involved in resisting pathogens in N. attenuata.
abstract_unstemmed	Increases in pathogenesis-related (PR) transcripts are commonly interpreted as evidence of plants' resistance responses to pathogens; however, few studies have examined whether increases in PR proteins protect plants growing under natural conditions. Pseudomonas syringae pv. tomato DC3000, which is virulent and causes disease in Arabidopsis, is also pathogenic to the native tobacco Nicotiana attenuata. N. attenuata responds to P. syringae pv. tomato DC3000's challenges with increases in salicylic acid and transcripts of at least two PR genes, PR-1 and PR13/Thionin. To determine if either of these PR proteins functions in bacterial resistance, we independently silenced both genes by RNAi and found that only PR-13/Thionin mediates resistance to P. syringae pv. tomato DC3000 in glasshouse experiments. When NaPR-1- and NaThionin-silenced plants were transplanted into the plant's native habitat in the Great Basin Desert of Utah, opportunistic Pseudomonas spp. performed better on NaThionin-silenced plants compared with NaPR-1-silenced and wild-type (WT) plants, and accounted for increased plant mortality. The native herbivore community of N. attenuata attacked both NaPR-1- and PR-13/NaThionin-silenced plants to the same degree as it did in WT plants, indicating that neither PR protein provides resistance to herbivores. Although PR-1 is generally considered a marker gene of disease resistance, we found no evidence that it has an antimicrobial function. In contrast, PR-13/NaThionin is clearly an ecologically relevant defense protein involved in resisting pathogens in N. attenuata.
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title_short	PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance
url	https://doi.org/10.1094/MPMI-21-7-0988 https://doaj.org/article/579e8d8acdcc4c6287caba9182e2cd88 https://apsjournals.apsnet.org/doi/10.1094/MPMI-21-7-0988 https://doaj.org/toc/0894-0282 https://doaj.org/toc/1943-7706
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up_date	2024-07-03T14:32:38.844Z
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PR-13/Thionin But Not PR-1 Mediates Bacterial Resistance in Nicotiana attenuata in Nature, and Neither Influences Herbivore Resistance

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