Faculty Profiles - ICHINOSE Yuki

MISC - ICHINOSE Yuki

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REGULATION OF PLANT DEFENSE RESPONSES BY SIGNALS FROM FUNGAL PATHOGENS

T SHIRAISHI, T YAMADA, Y ICHINOSE

NIPPON NOGEIKAGAKU KAISHI-JOURNAL OF THE JAPAN SOCIETY FOR BIOSCIENCE BIOTECHNOLOGY AND AGROCHEMISTRY 69 ( 2 ) 174 - 177 1995.2

THE RELATIONSHIP BETWEEN SYSTEMIC RESISTANCE INDUCED BY PRUNING AND ACCUMULATION OF ANTIFUNGAL SUBSTANCES IN BARLEY SEEDLINGS

T HIRAMOTO, N ABE, R TOBIMATSU, T SHIRAISHI, H OKU, T YAMADA, Y ICHINOSE

JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT 143 ( 1 ) 43 - 46 1995.1

Language：English Publisher：BLACKWELL WISSENSCHAFTS VERLAG GMBH

Infection by a compatible race of Erysiphe graminis f. sp. hordei on barley secondary leaves was significantly suppressed upon pruning of the primary leaves when E. graminis hordei was inoculated 3-12 h after the pruning, but it was rather enhanced during 15-21 h. The accumulation of antifungal substances was detected in hot ethanol extracts of barley seedlings from 15-27 h after pruning the primary leaves. Taking the time of the infection process of a challenger (E. graminis hordei) into consideration, timing of systemic resistance induced upon pruning coincided with the accumulation of antifungal substances.

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SIGNAL MOLECULES INDUCING SYSTEMIC RESISTANCE AND SUSCEPTIBILITY IN BARLEY SEEDLINGS

T HIRAMOTO, R TOBIMATSU, N ABE, T SHIRAISHI, H OKU, T YAMADA, Y ICHINOSE

JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT 143 ( 1 ) 47 - 51 1995.1

Language：English Publisher：BLACKWELL WISSENSCHAFTS VERLAG GMBH

Exudate collected from the cut end of barley seedlings exhibited both activities that induced systemic resistance and susceptibility against Erysiphe graminis f. sp. hordei race Hh4 depending on the time after pruning. Exudates collected between 3-6 h after pruning showed maximum activity that induced systemic resistance, whereas those during 9-12 h conversely induced susceptibility in barley seedlings. The accumulation of antifungal substances in barley leaves correlates to the timing of induced resistance. The antifuntingal substances were water-soluble and severely affected the infection of E. graminis f. sp. hordei.

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Characterization of nuclear factors for elicitor-mediated activation of the promoter of the pea phenylalanine ammonia-lyase gene 1. (共著)

KATO H, WADA M, MURAYA K, MALIK K, SHIRAISHI T, ICHINOSE Y, YAMADA T

Plant Physiology 108 ( 1 ) 129 - 139 1995

Suppression of the activation of chitinase and β-1, 3-glucanase in pea epicotyls by endogenous suppressor from ┣DBPisum sativum(/)-┫DB. (共著)

Annals of the Phytopathological Society of Japan 1995

Regulation of plant defense responses by signals from fangal pathogeus

Tomonori Shiraishi, Tetsuji Yamada, Yuki Ichinose

Nippon N(]E87C7[)geikagaku Kaishi 69 ( 2 ) 174 - 177 1995

病原菌シグナルと植物の防御応答共著

白石友紀, 山田哲治, 一瀬勇規

日本農芸化学会誌 69 ( 2 ) 174 - 177 1995

H⁺ - translocating activity in proteoliposomes reconstituted with pea plasma membrane ATPase and its inhibition by fungal suppnessor from Mycosphaerella pinodes(共著)

Annals of Phytopathological Society of Japan 61 134 - 136 1995

Supprescin from a phytopathogenic fungus deactivates transcription of a plant defense gene encodig phenylalanine ammonia-lyase. (共著)

Journal of Molecular Biology 1995

Signal molecules inducing systemic resistance and susceptibility in barley seedling. (共著)

Journal of Phytopathology 143 1995

The relationship between systemic resistance induced by pruning and accumulation of antifungal substances in barley seedlings. Reviewed

Hiramoto, T, Abe, N, Tobimatsu, R, Shiraishi, T, Oku, H, Yamada, T, Ichinose, Y

143 47 - 51 1995

Suppression of the Activation of Chitinase and β-1,3-Glucanase in Pea Epicotyls by Endogenous Suppressor from Pisum sativum

NASU Kimio, YOSHIOKA Hirofumi, ICHINOSE Yuki, YAMADA Tetsuji, OKU Hachiro, SHIRAISHI Tomonori

Annals of the Phytopathological Society of Japan 61 ( 1 ) 13 - 17 1995

Language：English Publisher：The Phytopathological Society of Japan (PSJ)

Healthy pea plants contain a factor, as called an endogenous suppressor, which suppresses the accumulation of pisatin induced by the elicitor from a pea pathogen, Mycosphaerella pinodes. The effects of the endogenous suppressor on the activation of pathogenesis-related proteins (PR-proteins) such as chitinase and β-1,3-glucanase were examined. The fungal elicitor induced the activations of these enzymes in pea, kidney bean and soybean, however, the concomitant presence of the endogenous suppressor with the fungal elicitor resulted in suppression of activations of these enzymes in only pea but not in kidney bean or soybean. In contrast, the endogenous suppressor alone rather activated these enzymes in kidney bean and soybean to which M. pinodes is nonpathogenic. Thus, the action of endogenous suppressor on the activation of PR-proteins is species-specific as well as that on the production of phytoalexins. Together with our previous report, these findings show that the pea endogenous suppressor may have a potential to block the general resistance of its producer and that it is quite similar to the exogenous suppressor from M. pinodes with respect to the biological activities.

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Other Link： http://agriknowledge.affrc.go.jp/RN/2010520740

H⁺ - translocating activity in proteoliposomes reconstituted with pea plasma membrane ATPase and its inhibition by fungal suppnessor from Mycosphaerella pinodes(共著)

Annals of Phytopathological Society of Japan 61 134 - 136 1995

SUPPRESSORS - DETERMINANTS OF SPECIFICITY PRODUCED BY PLANT-PATHOGENS

T SHIRAISHI, T YAMADA, K SAITOH, T KATO, K TOYODA, H YOSHIOKA, HM KIM, Y ICHINOSE, M TAHARA, H OKU

PLANT AND CELL PHYSIOLOGY 35 ( 8 ) 1107 - 1119 1994.12

Language：English Publishing type：Book review, literature introduction, etc. Publisher：JAPANESE SOC PLANT PHYSIOLOGISTS

Plant pathogens secrete suppressors that delay or prevent the host defense responses, with resultant conditioning of host cells such that they become susceptible even to avirulent or nonpathogenic microorganisms. Suppressors have been characterized as glycoproteins, glycopeptides, peptides and anionic and nonanionic glucans. A suppressor itself is non-toxic to plant cells and, thus, it can be distinguished from host-specific toxins produced by certain pathogens. Suppressors disturb fundamental functions of host plasma membranes. For example, the suppressor from a pea pathogen, Mycosphaerella pinodes, inhibits both the ATPase activity and polyphosphoinositide metabolism in pea plasma membranes, causing the temporary suppression of the signal-transduction pathway that leads to the expression of defense genes, which encode key enzymes in the biosynthetic pathway to phytoalexin. In this review, evidence for the role of suppressors in the determination of plant host-parasite specificity is summarized.

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Suppressor produced by a pea pathogen, ┣DBM(/)-┫DB. pinodes. (共著)

Grain Legumes 4 22 - 23 1994

Suppressor produced by a pea pathogen, ┣DBM(/)-┫DB. pinodes. (共著)

Grain Legumes 4 22 - 23 1994

RAPID CHANGES IN POLYPHOSPHOINOSITIDE METABOLISM IN PEA IN RESPONSE TO FUNGAL SIGNALS

K TOYODA, T SHIRAISHI, T YAMADA, Y ICHINOSE, H OKU

PLANT AND CELL PHYSIOLOGY 34 ( 5 ) 729 - 735 1993.7

Language：English Publisher：JAPANESE SOC PLANT PHYSIOLOGISTS

Effects of the elicitor and/or suppressor from Mycosphaerella pinodes on polyphosphoinositide metabolism (PI metabolism) in pea were examined both in vivo and in vitro. The elicitor induced a rapid and biphasic increase in levels of phosphatidylinositol-4,5-bisphosphate (PtdInsP2) and inositol 1,4,5-trisphosphate (IP3) in epicotyl tissues that was apparent within 15 min. A transient increase in levels of PtdInsP2 and IP3 was detected immediately in elicitor-treated plasma membranes. However, the concomitant presence of suppressor with elicitor resulted in inhibition of these increases both in vivo and in vitro. These findings suggest that the elicitor rapidly activates phosphatidylinositol kinase, phosphatidylinositol-4-monophosphate kinase and phospholipase C, which are involved in PI metabolism, whereas the suppressor markedly inhibits these enzymes. Neomycin, a known inhibitor of phospholipase C, blocked the elicitor-induced accumulation both of IP3 and pisatin and it also induced local susceptibility in pea tissues that resembled that of the fungal suppressor. From these results, it appears that rapid changes in PI metabolism are indispensable in the signal transduction related to defense responses of pea plants.

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ORGANIZATION OF THE GENES ENCODING CHALCONE SYNTHASE IN PISUM-SATIVUM

C AN, Y ICHINOSE, T YAMADA, Y TANAKA, T SHIRAISHI, H OKU

PLANT MOLECULAR BIOLOGY 21 ( 5 ) 789 - 803 1993.3

Language：English Publisher：KLUWER ACADEMIC PUBL

To analyze the regulation of defense-related genes by signal molecules produced by phytopathogens, we isolated genes that encode chalcone synthase (CHS) in Pisum sativum. We have obtained seven independent genomic clones that contain at least seven classes of CHS genes, identified by the hybridization analysis to CHS cDNA and by the restriction mapping analysis. Two of the genomic clones (clone 5 and 6) each contain two CHS genes in a tandem repeat. The nucleotide sequence analysis of CHS genomic clone 5 revealed that PsCHS1 and PsCHS2 were corresponding genes of the CHS cDNA clones, pCC6 and pCC2, respectively, as reported earlier. Both genes are interrupted by a single intron of 88 nucleotides with identical sequences, although exonic sequences and 5'-flanking sequences are divergent. Nucleotide sequences of the introns in five other classes of CHS genes showed that three classes had an intron of 87 nt with a striking homology to each other, but that the intron of the other two classes of CHS genes showed heterogeneity both in size and nucleotide sequence. 5'-upstream regions of PsCHS1 and PsCHS2 did not show sequence homology except the 31 bp identical sequence that contains the CCTACC motif resembling the box-1 sequence. Both PsCHS1 and PsCHS2 genes are shown to be induced by fungal elicitor by a primer extension analysis and a transient transformation analysis using pea protoplasts prepared from suspension cultured-cells.

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ORGANIZATION OF THE GENES ENCODING CHALCONE SYNTHASE IN PISUM-SATIVUM

C AN, Y ICHINOSE, T YAMADA, Y TANAKA, T SHIRAISHI, H OKU

PLANT MOLECULAR BIOLOGY 21 ( 5 ) 789 - 803 1993.3

Language：English Publisher：KLUWER ACADEMIC PUBL

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MOLECULAR-CLONING OF PHENYLALANINE AMMONIA-LYASE CDNA FROM PISUM-SATIVUM

S KAWAMATA, T YAMADA, Y TANAKA, P SRIPRASERTSAK, H KATO, Y ICHINOSE, H KATO, T SHIRAISHI, H OKU

PLANT MOLECULAR BIOLOGY 20 ( 1 ) 167 - 170 1992.10

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