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(211) Differential Mechanisms of Systemic Resistance Induced by Plant Growth Promoting Fungus (PGPF) Penicillium spp. and Their Culture Filtrates(Abstract of the Paper Presented at the 2006 Annual Meeting in Sapporo)

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Title

(211) Differential Mechanisms of Systemic Resistance Induced

by Plant Growth Promoting Fungus (PGPF) Penicillium spp. and

Their Culture Filtrates(Abstract of the Paper Presented at the 2006

Annual Meeting in Sapporo)( 本文(Fulltext) )

Author(s)

KUBOTA, M.; HOSSAIN, M. M.; SULTANA, F.;

HYAKUMACHI, M.

Citation

[日本植物病理學會報] vol.[72] no.[4] p.[258]-[258]

Issue Date

2006-11-25

Rights

The Phytopathological Society of Japan (日本植物病理学会)

Version

出版社版 (publisher version) postprint

URL

http://hdl.handle.net/20.500.12099/30007

(2)

The Phytopathological Society of Japan

NII-Electronic Library Service The  Phytopathologioal  Sooiety  of  Japan

258 日本 植 物 病 理 学 会 報 第72巻  第4号 平 成 18年 11月

ミy7碗gα6 pv. tomato. Previous research  with culture filtrate

(CF)of GS8 −3 showed  the involvement of multiple  plant

signaling  pathways  in induced systemic  resistance process . ln this study, root treatment with CF of another  isolate Phoma

sp. GS8−1 demonstrated reduced  protection against Pst in SA

deficient NahG plants than w韮d ecotype  and also systemically

induced the expression  of known SA−responsive  genes PR −1,

PR −2, PR −5 in the leaves. These results suggested  that SA −

dependent defense−response  pathway  is involved for ISR

by CF of GS8 −1, indicating that ISR pathway by GS8 −1 is

divergent from those of GS8 −3. The gene expression  study

upon  challenge  inoculation with  Pst, also  confirmed  the

possible involvement of different pathways for ISR mediated

by two different isolates of Phoma sp.        岐 大 応

  (211) Kubota, M , Hossain, M . M ., Sultana, E and

Hyakumachi, M .  Differential Mechanisms of Systemic

Resistance lnduced by Plant Growth Promoting Fungus

(PGPF )Penicilli”m  spp . and  Their Culture Filtrates

The mechanism  of protection  offered by two isolates of

Penicillium spp., GP15 −1 and GP17−2, has been studied  in

Arabidopsis thaliana Columbia plants against  Pseudomonas

syringae  pv. tomato(Pst)pathogens . Arabidopsis thaliana

grown in soil amended  with barley grain inocula of」Penicillium

spp . or having root  treatment With culture  filtrates exhibited

clear  resistance  against  Pst. Elicitation of the ISR pathway by root colonization of Penicillium spP. has little effect on

the systemic  expression  of known defense related  genes.

However , an enhanced  expression  ofAtvsp  gene was  observed

in ISR−expressing  plants after challenge  inoculation. Root

dipping in CFs of∫Penicillium spp clearly  prirned the systemic

illduction of SA−and  ethylene −inducible genes. Jasmonate−/

ethylene −inducible gene 即 .2 was  only  activated  by culture

filtrate of GP15−1. Upon challenge  inoculation, CFs treated

plants exhibit  elevated  expression  of the respective  genes.

These results indicate that CF of GP17−2 is associated  with

activation  of SA −responsive  pathways, while  CF of GP15−l

f()110ws both SA−and 

jasmonate

−fethylene−dependent defense−

response  pathways                     岐 大 応 生 )

  (212) 佐 藤 昌 直・Raka M . Mitra・Remco M . van  Poecke・

John Coller* ・Jane Glazebrook ・  片 桐 文 章  ロイヌナ ズ ナー病 原 体 相 互 作 用 大 規 模 解 析 用マ イ クロ ア レイ “Arabidopsis

 Pathoarray”の開 発 Sato, M ., Mitra, R. M ., van  Poecke, R. M ., Glazebrook, J. and  Katagiri, E:Develop−

ment  of an Arabidopsis Pathoarray to Study Arabidopsis

thaliana−pathogen Interactions Arabidopsis undergoes

dynamic transcriptional reprogramming  in response  to

pathogen  attack . Tb elucidate  the underlying  s孟gnaling

network  we  need  to collect detailed descriptions about

the network  state combined  with a number  of specific

perturbations to the network . Gene expression  profiling can

be used  as a massive  phenotyping  method  fer the purpose  of collecting detailed descriptions. Current rnicroarray platfrms

are not  suitable  for this type of study  due to either  high cost or low technical reproducibility . Therefore, we  aimed  at

development of a high−performance small−scale microarray

platform with  genes  representing  diverse responses  during

interactions with  various  pathogens . We achieved  this

goal using a newly −developed normalization  method  and a

statistical  model  taking advantage  of a spot  tiling pattern

design. The correlation  coefficients between technical

duplicates ranged from O.977 to O.996. We are currently using

the microarray  for a large−scale  reverse  genetic approach

to elucidate the signaling  network  of the RPS2 −mediated resistance.   (Dept. of Plant Biology, Univ. of Minnesota・

 *Stanford Functional Genomics Facility, Stanfbrd University

  (213) 平野 恒 ・川崎 信二  植 物 抵 抗伝 子が局 在 する周 辺ゲ ノ ム領 域の 変 異 率の 解 析 Hirano, K. and

Kawasaki, S.:Hypervariability of Genome Region around

Plant Resistance Genes 植 物原 体は変 異に より容 易に抵 抗 性 遺 伝 子 (R gene) 産 物か らの 認 識 を 逃れる の に対し て,植 物 側は限 りある数の 1〜gene を用い てそれに対 抗し な くて はな ら ない.我々は これ まで に イ ネやア ラビ ド プシ ス の 1塩 基レベ で の詳 細 な 品 種accession 間 比 較 R gene の多 くが通 常の ゲノム領 域の数 倍〜1 倍 近い塩 基 置換を蓄 積し た ゲ ノム領 域に局 在 する こと を 示 し (平 野 ・ 川 崎,2003),こ の こと が抵 抗 性 遺 伝 子に多 様 性 を 付 与 す る原 動 力である と提 唱し て きて い る.し か しな が ら,これ らは非常に長い時 間をかけて蓄 積さ れた変 異を解 析 対 象と し て お り実 際の変 異速 度に関し て は不明であっ た.今 回 我々 は植 物 個 体 1世 代 当た りに発 生 する塩 基 置 換の頻 度 を 検 出し,抵 抗 性 遺 伝 子の ゲノ ム周辺 が変 異に富む領 域で あ る かを検 証し た.方 法とし て は変 異 を 導入 し た 不活 性 型の GUS 遺 伝 子をア ラ ビドプ シ ス に形 質 転 換し,次 世 代に て 発生する GUS 遺 伝 子の復 帰 突 然 変 異を青いス ポ ッ ト と し て観 察し た.結 果 及び推 定 される メ カ ニ ズ ムにつ い て報 告 する.      (生 物 研 )   (214) 田中 恒 之・小 野 祥 子 ・輪 湖 奈 央 ・平 塚 和 之  発 光レポーター遺 伝 子 を用いたシロイヌナズナ MPK3 遺 伝 N工 工一Eleotronio  Library  

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