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
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 応生)
(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 シロイヌナ 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 platf(〕rms
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 抗性遺伝 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 物病原 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 ル で の詳 細 な 品 種 ・accession 間 比 較か ら 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 異の速 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