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Common mycorrhizal networks activate salicylic acid defense responses of trifoliate orange(Poncirus trifoliata)

Journal of Integrative Plant Biology 2019年第10期61卷 1099-1111页

作者： Yi-Can Zhang Ying-Ning Zou Li-Ping Liu Qiang-Sheng Wu College of Horticulture and Gardening Yangtze University Jingzhou 434025 China Institute of Root Biology Yangtze University Jingzhou 434025 China Department of Chemistry Faculty of Science University of Hradec Kralove Hradec Kralove 50003 Czech Republic

Citrus canker, caused by Xanthomonas axonopo-dis pv. citri ('Xac'), is an important quarantine disease in citrus crops. Arbuscular mycorrhizal fungi (AMF) form symbiotic interactions with host plants and further affect their disease resistance, possibly by modulating the activity of salicylic acid (SA), a key phytohormone in disease resistance. Common mycorrhizal networks (CMNs) can interconnect plants, but it is not yet clear whether CMNs promote resistance to citrus canker and, if so, whether SA signaling is involved in this process. To test this possibility, we used a two-chambered rootbox to establish CMNs between trifoliate orange (Poncirus trifoliata) seedlings in chambers inoculated (treated) or not (neighboring) with the AMF, Paraglomus occultum. A subset of the AMF-inoculated seedlings were also inoculated with Xac (+AMF+Xac). At 2 d post-inoculation (dpi), compared with the +AMF-Xac treatment, neighboring seedlings in +AMF+Xac treatment had lower expression levels of the SA biosynthetic genes, PtPAL, PtEPS1, and PtPBS3, but higher SA levels, which attributed to the upregulation of PtPAL and PtPBS3 in treated seedlings and the transfer of SA, via CMNs, to the neighboring seedlings. At 4 dpi, the pathogenesis-related (PR) protein genes, PtPR1, PtPR4, and PtPR5, and the transcriptional regulatory factor gene, PtNPR1, were activated in neighboring seedlings of+AMF+Xac treatment. At 9 dpi, root phenylalanine ammo-nia-lyase activity and total soluble phenol and lignin concentrations increased in neighboring seedlings of+AMF+Xac treatment, likely due to the linkage and signal transfer, via CMNs. These findings support the hypothesis that CMNs transfer the SA signal from infected to neighboring healthy seedlings, to activate defense responses and affording protection to neighboring plants against citrus canker infection.

关键词： Poncirus trifoliata mycorrhizal salicylic acid defense responses

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<i>Ralstonia solanacearum</i>Induction Causes Biochemical and Oxidative Stress Isozyme Variations in Mangroves without Wilt

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American Journal of Plant Sciences 2013年第10期4卷 1968-1975页

作者： Sasidharan Sreedevi Sreedharan Sajith Kulangara Nanu Remani Sailas Benjamin Environ- mental Studies Division Centre for Water Resources Development and Management (CWRDM) Calicut India. Enzyme Technology Laboratory Biotechnology Division Department of Botany University of Calicut Calicut India

We evaluated the effects of Ralstonia solanacearum (Rs) induced biotic stress in three mangroves, viz., Avicennia officinalis, Derris trifoliata and Excoecaria agallocha. These plants were grown in pots as well as hydroponic systems with sufficient controls, and about 8 × 104 colony forming units of Rs suspension was injected into the healthy test plants (saplings). The plants were subjected to biochemical and isozyme analyses. Upon induction of Rs stress, highly significant (p 0.01) biochemical changes (%) were noticed in respect to controls: carbohydrate content was generally high (24-36) in all plants;hydroponic mangroves showed higher starch content, mangroves under hydroponic system showed increased reducing sugars (29-46), almost all mangroves showed increased protein content;phenolics showed a swing of decrease or increase between plants grown in pot and hydroponic systems;and all plants in general showed higher proline content. Regarding oxidative stress isozymes (OSE) and superoxide dismutase (EC1.***.1.1), mangroves showed 1 or 2 additional isozymes with comparable relative mobility;similarly 1 or 2 additional peroxidase (EC1.***.1.7) isozymes were found in mangroves grown under hydroponic system. Briefly, Rs induced biotic stress did not cause any wilt symptom in all the 3 mangroves tested, but their normal biochemical and OSE patterns, especially of those grown as hydroponics were elicited to significantly higher levels.

关键词： R. solanacearum Avicennia officinalis L. Derris trifoliata Lour. Excoecaria agallocha L.

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白木通提取物活血通脉的药理学效果研究

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湖北农业科学 2012年第13期51卷 2745-2749页

作者：夏维福郭冬生汪华珍龚群辉彭小兰湖南文理学院生命科学学院/动物学湖南省高校重点实验室湖南常德415000 湖南省常德市武陵区畜牧兽医水产局湖南常德415000

通过对白木通(Akebia trifoliata subsp.australis)茎藤和果实的皂苷、多糖和水提液等提取物饲养小白鼠,分别测定10 d后小白鼠的脾脏指数、胸腺指数、血浆白细胞总数、中性杆状白细胞、中性分叶白细胞、淋巴细胞、单核细胞百分率,同时... 详细信息

通过对白木通(Akebia trifoliata subsp.australis)茎藤和果实的皂苷、多糖和水提液等提取物饲养小白鼠,分别测定10 d后小白鼠的脾脏指数、胸腺指数、血浆白细胞总数、中性杆状白细胞、中性分叶白细胞、淋巴细胞、单核细胞百分率,同时还测定了小白鼠血液、肝、脑组织中蛋白质、MDA含量和SOD活性,探讨白木通茎藤和果实提取物对小白鼠活血通脉的效果。结果表明,白木通茎藤水提液明显提高了小白鼠的脾脏指数,效果显著优于果实多糖和果实皂苷;茎藤多糖显著提高小白鼠肝、脑组织中的SOD活性;白木通茎藤和果实提取物对小白鼠白细胞总数没有影响,但白木通果实皂苷能极显著地提高小白鼠淋巴细胞百分比。

关键词：白木通(Akebia trifoliata subsp.australis) 活血通脉水提液皂苷多糖

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三叶木通播种育苗技术操作规程

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湖北农业科学 2017年第18期56卷 3497-3500,3505页

作者：覃大吉向极钎杨永康马进万海英李红英李亚杰谢刚毅王孝元恩施清江生物工程有限公司湖北恩施445000 恩施自治州农业科学院湖北恩施445000

三叶木通[Akebia trifoliata(Thunb.)Koidz.]播种育苗技术操作规程阐述了三叶木通的播种育苗、种苗保存和运输等全过程,侧重规范了三叶木通播种育苗中种子处理、发芽箱制作、种子催芽、苗床选择与耕整、播种方法、水肥管理、病虫害防治... 详细信息

三叶木通[Akebia trifoliata(Thunb.)Koidz.]播种育苗技术操作规程阐述了三叶木通的播种育苗、种苗保存和运输等全过程,侧重规范了三叶木通播种育苗中种子处理、发芽箱制作、种子催芽、苗床选择与耕整、播种方法、水肥管理、病虫害防治、苗龄划分、种苗分级、起苗方法、运输与保存等关键技术环节。旨在为恩施州及周边地区三叶木通播种育苗提供规范化操作依据。

关键词：三叶木通[Akebia trifoliata (Thunb.)Koidz.] 播种育苗操作规程

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一种针毡式植物输液器的设计及其在三叶木通富硒栽培中的应用

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湖北农业科学 2017年第23期56卷 4552-4554,4558页

作者：向来覃大吉杨永康殷红清万海英陈菲菲马进田腾飞谢刚毅王孝元恩施市三岔乡农业技术服务中心湖北恩施445000 恩施土家族苗族自治州农业科学院湖北恩施445000

设计了一种针毡式植物输液器,并将其应用于三叶木通[Akebia trifoliata(Thunb)Koidz.]的富硒栽培。结果表明,该输液器输液速度稳定,吸收率高,成本低,使用简便,且对植物叶片无损伤,将其运用于三叶木通的富硒栽培,具有高效、简便的优点。

关键词：针毯式植物输液器三叶木通[Akebia trifoliata (Thunb) Koidz.] 富硒栽培

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