2021/05/13 更新

写真a

イシザキ サトミ
石崎 智美
ISHIZAKI Satomi
所属
教育研究院 自然科学系 地球・生物科学系列 助教
理学部 理学科 助教
職名
助教
外部リンク

学位

  • 博士(環境科学) ( 2011年3月   北海道大学 )

  • 修士(環境科学) ( 2008年3月   北海道大学 )

研究キーワード

  • 被食防衛

  • 種間相互作用

  • 植物生態学

  • 生活史

経歴(researchmap)

  • 新潟大学   理学部 理学科   助教

    2017年4月 - 現在

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  • 新潟大学   理学部 自然環境科学科 地球環境科学   助教

    2016年3月 - 2017年3月

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  • 新潟大学   自然科学研究科 環境科学専攻 自然システム科学   助教

    2012年4月 - 2016年2月

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  • 新潟大学   理学部 自然環境科学科   助教

    2012年4月 - 2016年2月

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経歴

  • 新潟大学   理学部 理学科   助教

    2017年4月 - 現在

  • 新潟大学   地球環境科学   助教

    2016年3月 - 2017年3月

  • 新潟大学   自然環境科学科   助教

    2012年4月 - 2016年2月

  • 新潟大学   自然科学研究科 環境科学専攻 自然システム科学   助教

    2012年4月 - 2016年2月

所属学協会

 

論文

  • Seasonal variation of responses to herbivory and volatile communication in sagebrush (Artemisia tridentata) (Asteraceae) 査読

    Satomi Ishizaki, Kaori Shiojiri, Richard Karban, Masashi Ohara

    JOURNAL OF PLANT RESEARCH129 ( 4 ) 659 - 666   2016年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER JAPAN KK  

    Plants can respond to insect herbivory in various ways to avoid reductions in fitness. However, the effect of herbivory on plant performance can vary depending on the seasonal timing of herbivory. We investigated the effects of the seasonal timing of herbivory on the performance of sagebrush (Artemisia tridentata). Sagebrush is known to induce systemic resistance by receiving volatiles emitted from clipped leaves of the same or neighboring plants, which is called volatile communication. Resistance to leaf herbivory is known to be induced most effectively after volatile communication in spring. We experimentally clipped 25 % of leaves of sagebrush in May when leaves were expanding, or in July when inflorescences were forming. We measured the growth and flower production of clipped plants and neighboring plants which were exposed to volatiles emitted from clipped plants. The treatment conducted in spring reduced the growth of clipped plants. This suggests that early season leaf herbivory is detrimental because it reduces the opportunities for resource acquisition after herbivory, resulting in strong induction of resistance in leaves. On the other hand, the late season treatment increased flower production in plants exposed to volatiles, which was caused mainly by the increase in the number of inflorescences. Because the late season treatment occurred when sagebrush produces inflorescences, sagebrush may respond to late herbivory by increasing compensation ability and/or resistance in inflorescences rather than in leaves. Our results suggest that sagebrush can change responses to herbivory and subsequent volatile communication seasonally and that the seasonal variation in responses may reduce the cost of induced resistance.

    DOI: 10.1007/s10265-016-0818-z

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  • Airborne signals of communication in sagebrush: A pharmacological approach 査読

    Kaori Shiojiri, Satomi Ishizaki, Rika Ozawa, Richard Karban

    Plant Signaling and Behavior10 ( 12 ) e1095416;   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Taylor and Francis Inc.  

    When plants receive volatiles from a damaged plant, the receivers become more resistant to herbivory. This phenomenon has been reported in many plant species and called plant-plant communication. Lab experiments have suggested that several compounds may be functioning as airborne signals. The objective of this study is to identify potential airborne signals used in communication between sagebrush (Artemisia tridentata) individuals in the field. We collected volatiles of one branch from each of 99 sagebrush individual plants. Eighteen different volatiles were detected by GC-MS analysis. Among these, 4 compounds
    1.8-cineol, β-caryophyllene, α-pinene and borneol, were investigated as signals of communication under natural conditions. The branches which received either 1,8-cineol or β-caryophyllene tended to get less damage than controls. These results suggested that 1,8-cineol and β-caryophyllene should be considered further as possible candidates for generalized airborne signals in sagebrush.

    DOI: 10.1080/15592324.2015.1095416

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  • Deciphering the language of plant communication: volatile chemotypes of sagebrush 査読

    Richard Karban, William C. Wetzel, Kaori Shiojiri, Satomi Ishizaki, Santiago R. Ramirez, James D. Blande

    New Phytologist204 ( 2 ) 380 - 385   2014年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1111/nph.12887

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  • Mechanisms of reproductive isolation of interspecific hybridization between Trillium camschatcense and T.tschonoskii (Melanthiaceae) 査読

    Satomi Ishizaki, Tamayo Abe, Masashi Ohara

    Plant Species Biology28 ( 3 ) 204 - 214   2013年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Reproductive isolation plays a significant role in the prevention of gene flow between different plant species. Isolation factors can vary, acting either pre- or postzygotically. Trillium camschatcense and T.tschonoskii are herbaceous perennials which frequently grow together in Hokkaido, Japan. Natural hybrid formation, T.×hagae, between these species is common, and occurs asymmetrically with T.camschatcense as the maternal parent and T.tschonoskii as the paternal. Here, we examined the efficiency of each reproductive isolation factor to clarify which factor was responsible for the frequency and asymmetry of the hybridization. We found that prezygotic barriers, self fertilization and conspecific pollen precedence, are major isolation factors in both parental species, and that T.tschonoskii as a maternal parent has more effective prezygotic barriers than T.camschatcense. In addition, hybrids with T.tschonoskii as the maternal parent were not observed to reach the flowering stage. We concluded that prezygotic isolation factors in the both species act as main barriers to prevent natural hybridization, and that asymmetry of the isolating barriers between these species would promote T.camschatcense as the maternal parent of the hybrids. © 2012 The Society for the Study of Species Biology.

    DOI: 10.1111/j.1442-1984.2012.00378.x

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  • Long-term demographic consequences of eavesdropping for sagebrush 査読

    Richard Karban, Satomi Ishizaki, Kaori Shiojiri

    Journal of Ecology100 ( 4 ) 932 - 938   2012年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    1. There are now approximately 10 examples of plants that use volatile cues emitted by damaged neighbours to adjust their defences against herbivores. For two of these examples, preliminary evidence suggested that plants may experience net benefits from such eavesdropping, although eavesdropping was uncommon in one case and estimates of plant fitness were ambiguous in the other case. 2.In the current study, we examined the long-term consequences of exposure to cues emitted by experimentally clipped sagebrush neighbours. In this sagebrush system we have repeatedly found that sagebrush plants that have experimentally clipped neighbours experience less herbivore damage over the season than plants with unclipped control neighbours under field conditions. We followed a cohort of young sagebrush plants from emergence in 1999 for 12years. Neighbours of half of these plants were artificially clipped every spring from 2004-08 and survival and flowering was measured in each autumn from 1999-2011. 3.Survival of marked branches of young plants was not consistently affected by whether its neighbour was clipped. Plants near clipped neighbours produced more branches during this period than those near unclipped neighbours. There were no measurable treatment effects on plant survival over the 12years. Branches near clipped neighbours produced more inflorescences than branches near unclipped neighbours. 4.Seedlings were more likely to survive to the end of their first dry season in two different years near clipped neighbours compared to unclipped neighbours. 5.Synthesis. The results suggest different effects of clipped neighbours that depend on plant age. Responding to the cues of experimental clipping may provide a slight net benefit, considering these results and other published studies, even though these cues provided little predictive value about actual risk of herbivory. Responding to reliable cues may be even more beneficial and may favour plants that eavesdrop on neighbours. The results suggest different effects of clipped neighbours that depend on plant age. Responding to the cues of experimental clipping may provide a slight net benefit, considering these results and other published studies, even though these cues provided little predictive value about actual risk of herbivory. Responding to reliable cues may be even more beneficial and may favour plants that eavesdrop on neighbours. © 2012 The Authors. Journal of Ecology © 2012 British Ecological Society.

    DOI: 10.1111/j.1365-2745.2012.01974.x

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  • Prolonged exposure is required for communication in sagebrush 査読

    Kaori Shiojiri, Richard Karban, Satomi Ishizaki

    ARTHROPOD-PLANT INTERACTIONS6 ( 2 ) 197 - 202   2012年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    Volatile communication allows plants to coordinate systemic induced resistance against herbivores. The mechanisms responsible and nature of the cues remain poorly understood. It is unknown how plants distinguish between reliable cues and misinformation. Previous experiments in which clipped sagebrush branches were bagged suggested that cues are emitted or remain active for up to 3 days. We conducted experiments using plastic bags to block emission of cues at various times following experimental clipping. We also collected headspace volatiles from clipped and unclipped branches for 1 h, transferred those volatiles to assay branches, and incubated the assays for either 1 or 6 h. We found that assay branches that received volatile cues for less than 1 h following clipping of neighbors failed to induce resistance. Assay branches that received volatile cues for more than 1 h experienced reduced herbivory throughout the season. Branches incubated for 6 h with volatiles that had been collected during the first hour following clipping showed induced resistance. These results indicate that sagebrush must receive cues for an extended time (> 1 h) before responding; they suggest that the duration of cue reception is an important and overlooked process in communication allowing plants to avoid unreliable, ephemeral cues.

    DOI: 10.1007/s11829-011-9180-1

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  • Clonal growth of sagebrush (Artemisia tridentata) (Asteraceae) and its relationship to volatile communication 査読

    Satomi Ishizaki, Kaori Shiojiri, Richard Karban, Masashi Ohara

    PLANT SPECIES BIOLOGY27 ( 1 ) 69 - 76   2012年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    To increase systemic resistance to herbivory, some clonal plants transmit internal cues among clonal ramets to prevent widespread damage to genets. Sagebrush (Artemisia tridentata) (Asteraceae) is known to use volatile cues to induce resistance within and between plants (so-called volatile communication). In the present study, we observed the extent and frequency of clonal growth in a natural sagebrush population in western North America to understand the influence of clonal growth on volatile communication. We used genetic analysis involving microsatellite markers and excavation of the root systems. In addition, we characterized the volatile profiles from the headspace of sagebrush ramets. Excavation of the root system of sagebrush plants revealed that sagebrush propagates clonally below ground and that daughter ramets grow near the mother stem. Volatiles were variable among genetically different ramets, although clonal ramets (genetically identical ramets) released similar volatiles, suggesting a genetic basis for volatile similarity. Sagebrush has been shown to be most responsive to volatiles released from artificially produced clones and suffers less herbivore damage as a result. Therefore, these results, taken into consideration together, imply that volatile communication may occur among genetically identical ramets under natural conditions, and that volatile similarity between the releaser and receiver may be recognized by the receiver and increase resistance against herbivory.

    DOI: 10.1111/j.1442-1984.2011.00333.x

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  • Defense strategies against herbivory and its relation to characteristics of life history in plant species.

    Satomi Ishizaki

        2011年3月

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    記述言語:英語   掲載種別:学位論文(その他)  

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  • An Air Transfer Experiment Confirms the Role of Volatile Cues in Communication between Plants 査読

    Richard Karban, Kaori Shiojiri, Satomi Ishizaki

    AMERICAN NATURALIST176 ( 3 ) 381 - 384   2010年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:UNIV CHICAGO PRESS  

    Previous studies reported that sagebrush plants near experimentally clipped neighbors experienced less herbivory than did plants near unclipped neighbors. Blocking air flow with plastic bags made this effect undetectable. However, some scientists remained skeptical about the possibility of volatile communication between plants since the existence and identity of a cue that operates in nature have never been demonstrated. We conducted an air transfer experiment that collected air from the headspace of an experimentally clipped donor plant and delivered it to the headspace of an unclipped assay plant. We found that assay plants treated with air from clipped donors were less likely to be damaged by naturally occurring herbivores in a field experiment. This simple air transfer experiment fulfills the most critical of Koch's postulates and provides more definitive evidence for volatile communication between plants. It also provides an inexpensive experimental protocol that can be used to screen plants for interplant communication in the field.

    DOI: 10.1086/655222

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  • Effect of the specialist herbivore Luehdorfia puziloi on the performance of a woodland herbaceous plant, Asarum heterotropoides 査読

    Satomi Ishizaki, Tadashi Narumi, Miki Mizushima, Masashi Ohara

    PLANT SPECIES BIOLOGY25 ( 1 ) 61 - 67   2010年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL PUBLISHING, INC  

    Plants show many responses to herbivore damage caused by insects. We investigated the effect of the specialist leaf herbivore Luehdorfia puziloi on the performance of a deciduous forest understory perennial herb Asarum heterotropoides. We conducted artificial defoliation experiments with different levels of damage (0, 50 or 100% clipping) in the early growing period (flowering time: early May) and in the late growing period (when natural herbivory by L. puziloi larvae occurs: early June) in a natural population. Effects of the defoliation treatments on reproduction (seed-set ratio) of A. heterotropoides in the treated year and on survival and development of the plant in the subsequent year were investigated. Severe defoliation conducted in the early period resulted in less current-year seed production and increased regression to a dormant or non-reproductive stage in the following year, which would reduce the probability of future flowering. In contrast, defoliation conducted in the late period had no effect on the reproduction, survival and development of A. heterotropoides. Similarly, we found no obvious correlation between the damaged leaf area during the later period and seed set. Our results show that the specialist herbivore L. puziloi did not influence the performance of A. heterotropoides by damaging the plant later in the season when it was tolerant of damage.

    DOI: 10.1111/j.1442-1984.2009.00263.x

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  • Permanent genetic resources added to Molecular Ecology Resources Database 1 August 2009–30 September 2009 査読

    Molecular Ecology Resources Primer Development, Consortium, Doukary Abdoullaye, I Acevedo, Abisola A Adebayo, Jasminca Behrmann-Godel, R C Benjamin, Dan G Bock, Céline Born, Carine Brouat, Adalgisa Caccone, Ling-Zhen Cao, P Casado-Amezúa, J Catanéo, M M Correa-Ramirez, Melania E Cristescu, Gauthier Dobigny, Emmanuel E Egbosimba, Lianna K Etchberger, Bin Fan, Peter D Fields, D Forcioli, P Furla, F J Garcia de Leon, R García-Jiménez, Philippe Gauthier, René Gergs, Clementina González, Laurent Granjon, Carla Gutiérrez-Rodríguez, Nathan P Havill, P Helsen, Tyler D Hether, Eric A Hoffman, Xiangyang Hu, Pär K Ingvarsson, S Ishizaki, Heyi Ji, X S Ji, M L Jimenez, R Kapil, R Karban, Stephen R Keller, S Kubota, Shuzhen Li, Wansha Li, Douglas D Lim, Haoran Lin, Xiaochun Liu, Yayan Luo, A Machordom, Andrew P Martin, E Matthysen, Maxwell N Mazzella, Mélodie A McGeoch, Zining Meng, M Nishizawa, Patricia O'Brien, M Ohara, Juan Francisco Ornelas, M F Ortu, Amy B Pedersen, L Preston, Qin Ren, Karl-Otto Rothhaupt, Loren C Sackett, Qing Sang, G M Sawyer, K Shiojiri, Douglas R Taylor, S Van Dongen, Bettine Jansen, Van Vuuren, S Vandewoestijne, H Wang, J T Wang, LE Wang, Xiang-Li Xu, Guang Yang, Yongping Yang, Y Q Zeng, Qing-Wen Zhang, Yongping Zhang, Y Zhao, Yan Zhou

    Molecular Ecology Resources10 ( 1 ) 232 - 236   2010年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1111/j.1755-0998.2009.02796.x

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  • Volatile communication among sagebrush branches affects herbivory: timing of active cues 査読

    Kaori Shiojiri, Richard Karban, Satomi Ishizaki

    ARTHROPOD-PLANT INTERACTIONS3 ( 2 ) 99 - 104   2009年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    Airborne communication can affect systemic induced resistance to herbivory on neighboring branches and individual plants. Sagebrush is the best known example of this phenomenon although the mechanisms of this communication system remain unidentified. We do not know the timing of emission or the chemical nature of the active cue. We investigated the timing of this phenomenon by using plastic bags to prevent propagation of volatile compounds and experimentally manipulated the timing of removal of these bags. We found that blocking the volatiles prevented systemic induced resistance. Experimentally allowing clipped branches to release cues for up to 3 days after clipping caused a reduction in damage in neighboring branches on the clipped plants. This indicates that active cues are released from the time we clipped for the next 3 days or that cues released immediately remained active over this time period. As we continue to evaluate potential chemicals as active cues in plant communication, this prolonged effectiveness may provide an important screen against which to evaluate any putative signals.

    DOI: 10.1007/s11829-009-9060-0

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  • 北海道における低地林保全の新たな試み―植物の生活史研究を基礎とした環境教育―

    八幡かおり, 富松裕, 山岸洋貴, 荒木希和子, 久保田渉誠, 鳴海匡, 石崎智美, 内藤弥生, 加藤優希, 田中博子, 広尾町教育委員会, 大原雅

    環境科学総合研究所年報26   65 - 84   2008年4月

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    記述言語:日本語   掲載種別:研究論文(その他学術会議資料等)  

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