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      7種槭樹釋放揮發(fā)性有機(jī)化合物組分分析

      2016-06-30 03:09:02劉華紅張汝民浙江農(nóng)林大學(xué)亞熱帶森林培育國家重點(diǎn)實(shí)驗(yàn)室培育基地浙江臨安311300
      關(guān)鍵詞:氣相色譜植物學(xué)

      王 琦,劉華紅,王 彬,張汝民,高 巖(浙江農(nóng)林大學(xué) 亞熱帶森林培育國家重點(diǎn)實(shí)驗(yàn)室培育基地,浙江 臨安311300)

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      7種槭樹釋放揮發(fā)性有機(jī)化合物組分分析

      王琦,劉華紅,王彬,張汝民,高巖
      (浙江農(nóng)林大學(xué) 亞熱帶森林培育國家重點(diǎn)實(shí)驗(yàn)室培育基地,浙江 臨安311300)

      摘要:為探討槭樹Acer spp.釋放揮發(fā)性有機(jī)化合物(VOCs)的組分,采用動(dòng)態(tài)頂空氣體循環(huán)法對(duì)苦茶槭A. ginnala,雞爪槭A. palmatum,三角槭A. buergerianum,樟葉槭A. cinnamomifolium,羊角槭A. yangJuechi,毛脈槭A. pubinerve和青榨槭A. davidii等7種植物釋放VOCs進(jìn)行收集,利用熱脫附/氣相色譜/質(zhì)譜(TDS-GC-MS)聯(lián)用技術(shù)對(duì)其組分進(jìn)行分析。結(jié)果表明:不同樹種釋放VOCs種類與相對(duì)含量差異明顯??嗖栝屎颓嗾ラ史謩e釋放17種和20種成分,以酯類、醛類和醇類物質(zhì)為主,相對(duì)含量較多的有乙酸葉醇酯、癸醛、(Z)-3-己烯-1-醇和壬醛;雞爪槭、三角槭和毛脈槭分別釋放15種、19種和23種成分,以萜類、酯類和醛類物質(zhì)為主,相對(duì)含量較多的為羅勒烯、乙酸葉醇酯、癸醛、長(zhǎng)葉烯和壬醛;樟葉槭釋放24種成分,以萜類化合物為主,相對(duì)含量較多的有羅勒烯、α-蒎烯、3-蒈烯、β-蒎烯和松油烯;羊角槭釋放25種成分,以萜類、醛類和醇類物質(zhì)為主,相對(duì)含量較多的有癸醛、長(zhǎng)葉烯、2-乙基-1-己醇、石竹烯和壬醛。以上7種槭樹均可作為保健型園林植物材料。圖3表1參29

      關(guān)鍵詞:植物學(xué);槭樹;揮發(fā)性有機(jī)化合物;熱脫附/氣相色譜/質(zhì)譜聯(lián)用技術(shù)

      浙江農(nóng)林大學(xué)學(xué)報(bào),2016,33(3):524-530

      Journal of ZheJiang A&F University

      植物通過次生代謝釋放的揮發(fā)性有機(jī)化合物(volatile organic compounds,VOCs)主要包括萜烯類、苯丙酸類/苯環(huán)型和脂肪酸衍生物[1-2]。這些VOCs是植物生長(zhǎng)[3]、發(fā)育[4]和繁衍[5]以及抵抗不利條件[6-8]的重要手段,在人居環(huán)境中影響空氣質(zhì)量[9]和人體健康[10-12]。隨著核磁共振和色譜等分析技術(shù)的發(fā)展,對(duì)園林樹木釋放VOCs的研究逐漸增多。目前,國內(nèi)研究集中在油松Pinus tabuliformis,側(cè)柏Platycladus orientalis等針葉樹上[11, 13],而對(duì)闊葉樹較缺乏系統(tǒng)研究。槭樹Acer spp.隸屬槭樹科Aceraceae槭樹屬Acer闊葉喬木或灌木,主產(chǎn)于北溫帶地區(qū),是溫帶落葉闊葉林、針闊混交林以及亞熱帶山地森林的建群種和重要組成,也是針葉林的伴生種,中國槭樹種類世界最多,許多槭樹為優(yōu)良荒山綠化和園林造景樹種[14]。糖槭A. saccharum,五角楓A. mono,元寶楓A. truncatum,復(fù)葉槭A. negundo和挪威槭A. platanoides等釋放的VOCs具有信號(hào)傳導(dǎo)[15]、抑制昆蟲[16-17]和真菌[18]的作用,關(guān)于其他槭樹釋放VOCs尚未見報(bào)道。因此,本研究以槭樹為試驗(yàn)材料,采用活體植株動(dòng)態(tài)頂空氣體循環(huán)采集法與熱脫附/氣相色譜/質(zhì)譜(TDS-GC-MS)聯(lián)用技術(shù)測(cè)定不同槭樹釋放VOCs,旨在探索槭樹釋放VOCs組分與規(guī)律,為進(jìn)一步研究植物VOCs對(duì)環(huán)境質(zhì)量的影響以及植物配置提供依據(jù)。

      1 材料與方法

      1.1材料

      以浙江農(nóng)林大學(xué)東湖校區(qū)7種不同槭樹苦茶槭Acer ginnala,雞爪槭A. palmatum,三角槭A. buergerianum,樟葉槭A. cinnamomifolium,羊角槭A. yangJuechi,毛脈槭A. pubinerve和青榨槭A. davidii為材料。采集健康無損傷,樹齡15 a左右植株枝葉釋放VOCs。

      1.2 VOCs采集

      于2013年7月10-20日上午10:00-11:00,采用動(dòng)態(tài)頂空氣體循環(huán)法[11]采集7種槭樹枝葉釋放VOCs。選擇生長(zhǎng)一致的葉片,采集葉片40片·次-1,3次重復(fù)。采氣袋容積為0.1 m3,采氣時(shí)間30 min,氣體流量0.1 m3·min-1。

      1.3VOCs分析

      VOCs分析采用TDS-GC-MS聯(lián)用技術(shù),儀器及參數(shù)設(shè)置條件參考文獻(xiàn)[11]。TDS(德國GERSTEL公司TD3型)工作條件:系統(tǒng)載氣壓力20 kPa,進(jìn)樣口溫度250℃,脫附溫度250℃,10 min,冷阱溫度-100℃,保持3 min,冷阱進(jìn)樣時(shí)溫度驟然升至260℃。GC(7890A,Agilent安捷倫科技有限公司)工作條件:色譜柱為30.00 m×250.00 μm×0.25 μm的HP-5 MS柱;程序升溫;初始溫度40℃,4 min后以6℃·min-1的速率升至250℃,保持3 min后以10℃·min-1的速率升至270℃,保持5 min。MS (5975C,Agilent安捷倫科技有限公司)工作條件:電離方式為EI,電子能量為70 eV,質(zhì)量范圍為4.67× 10-27~75.02×10-27,接口溫度280℃,離子源溫度230℃,四級(jí)桿溫度150℃。

      1.4數(shù)據(jù)處理

      采用NIST 2008譜圖庫兼顧色譜保留時(shí)間,同時(shí)結(jié)合手工檢索確定VOCs成分,利用峰面積歸一化法測(cè)定各組分的百分含量,數(shù)據(jù)處理采用Origin 8軟件。

      2 結(jié)果與分析

      2.1槭樹科7種植物釋放VOCs成分分析

      槭樹科7種植物釋放的VOCs通過TDS-GC-MS分析(圖1),扣除本底空氣中的雜質(zhì)后,共鑒定出48種化合物(表1)。其中苦茶槭鑒定出17種化合物,主要是酯類、醛類和醇類,包括乙酸葉醇酯(63.0%),癸醛(6.5%)和2-乙基-1-己醇(5.6%)等10種化合物,占VOCs總量的89.7%;雞爪槭檢測(cè)出15種化合物,主要是酯類、萜類和醇類,包括乙酸葉醇酯(49.6%),長(zhǎng)葉烯(9.7%),2-乙基-1-己醇(11.7%)等11種化合物,占VOCs總量的85.5%;三角槭檢測(cè)出19種化合物,主要是萜類、醛類和酯類,包括羅勒烯(20.3%),長(zhǎng)葉烯(10.6%),乙酸葉醇酯(13.0%),癸醛(11.3%)和壬醛(9.2%)等14種化合物,占VOCs總量的84.9%;樟葉槭檢測(cè)出24種化合物,主要為羅勒烯(24.4%),α-蒎烯(15.6%)和3-蒈烯(11.9%)等18種萜類化合物,占VOCs總量的96.6%;羊角槭檢測(cè)出25種化合物,主要是萜類、醛類和醇類,包括長(zhǎng)葉烯(12.0%),石竹烯(10.1%),癸醛(14.9%),壬醛(8.6%)和2-乙基-1-己醇(11.8%)等17種化合物,占VOCs總量的81.1%;毛脈槭檢測(cè)出23種化合物,主要為萜類和酯類,包括羅勒烯(11.4%),長(zhǎng)葉烯(8.9%)和乙酸葉醇酯(18.3%)等18種化合物,占VOCs總量的79.0%;青榨槭檢測(cè)出20種化合物,主要是醇類、酯類和醛類,包括乙酸葉醇酯(23.7%),癸醛(15.0%),壬醛(10.1%),(Z)-3-己烯-1-醇(11.1%)和2-乙基-1-己醇(7.7%)等11種化合物,占VOCs總量的80.9%。

      表1 7種槭樹釋放揮發(fā)性有機(jī)化合物(VOCs)主要組分(平均值±標(biāo)準(zhǔn)偏差)Table 1 Main components of the volatile organic compounds released from branches and leaves in 7 Acer species(mean±SD)

      表1 (續(xù))Table 1?。–ontinued)

      槭樹科7種植物釋放VOCs的共有成分是α-蒎烯、長(zhǎng)葉烯、長(zhǎng)葉環(huán)烯、雪松烯、石竹烯、反式-2-十二烯-1-醇、壬醛和癸醛等8種化合物,分別占苦茶槭、雞爪槭、三角槭、樟葉槭、羊角槭、毛脈槭和青榨槭各總量的20.5%,26.7%,46.2%,19.8%,57.2%,29.9%和38.0%。常綠樹樟葉槭與落葉樹苦茶槭、雞爪槭、三角槭、羊角槭、毛脈槭和青榨槭共有成分分別為21.5%,32.6%,70.0%,67.4%,55.4%和43.9%。特有成分最多的是樟葉槭(24.4%),其次是青榨槭(12.7%)、毛脈槭(4.2%)、三角槭(3.9%)、羊角槭(3.3%)和雞爪槭(1.3%)。

      圖1 7種槭樹釋放VOCs的總離子流圖Figure 1  Total ion current of volatile organic compounds released from branches and leaves in 7 Acer species

      2.2槭樹科7種植物釋放VOCs種類及差異性比較

      7種槭樹科植物釋放VOCs種類和相對(duì)含量存在顯著差異(圖2)。苦茶槭共有5類化合物,萜類6種(8.6%),醇類4種(11.0%),酯類4種(67.6%),醛類2種(11.2),烴類1種(1.6%);雞爪槭含有萜類、烴類、醛類等5類化合物,萜類7種(20.1%),醇類1種(11.9%),酯類3種(52.9%),醛類2種(9.6%),含氮化合物1種(3.1%);三角槭包括萜類、酮類、醛類等6類化合物:萜類8種(46.1%),醇類2種(10.3%),酯類3種(17.0%),醛類3種(21.9%),酮類2種(2.6%),含氮化合物1種(2.2%);樟葉槭含有萜類、醇類、醛類等5類化合物:萜類18種(96.6%),醇類1種(0.4%),醛類3種(2.3%),酮類1種(0.3%),含氮化合物1種(0.5%);羊角槭含有萜類、醇類、酯類等6類化合物,萜類9種(36.7%),醇類5種(19.3%),酯類3種(9.6%),醛類3種(25.1%),酮類3種(7.2%),烴類2種(2.1%);毛脈槭含有萜類、醇類、酯類等4類化合物,萜類15種(54.9%),醇類3種(11.3%),酯類3種(24.1%),醛類2種(9.7%);青榨槭含有萜類、醇類、脂類等6類化合物,萜類6種(14.4%),醇類6種(27.2%),酯類2種(27.1%),醛類3種(26.6%),酮類2種(3.2%),烴類1種(1.5%)。萜類化合物含量最高的是樟葉槭,其相對(duì)含量分別是苦茶槭、雞爪槭、三角槭、羊角槭、毛脈槭和青榨槭的14.6倍、4.8倍、2.1倍、2.6倍、2.8倍和6.7倍。在苦茶槭VOCs中脂類化合物相對(duì)含量最高,其相對(duì)含量是雞爪槭、三角槭、羊角槭、毛脈槭和青榨槭的1.3倍、4.0倍、7.1倍、2.8倍和2.5倍,在樟葉槭中未檢測(cè)到。

      圖2 7種槭樹釋放VOCs的相對(duì)含量Figure 2  Relative contents of VOCs from branches and leaves in 7 Acer species

      圖3 7種槭樹釋放VOCs的種類Figure 3 Constituents of VOCs from branches and leaves in 7 Acer species

      3 結(jié)論與討論

      本研究對(duì)華東地區(qū)生長(zhǎng)的7種槭樹釋放VOCs研究表明:同屬不同種間植物釋放VOCs種類和相對(duì)含量差異明顯。常綠樹樟葉槭與落葉類釋放VOCs差異較大,說明槭樹中常綠類與落葉類釋放VOCs差異可能不完全反應(yīng)組系差異。落葉類槭樹間釋放VOCs差異較小,共有成分較高(占63.0%~96.0%),其中雞爪槭在落葉類中共有成分最高(占91.0%~94.0%),可能為所測(cè)落葉類槭樹釋放VOCs的核心類型。本研究中苦茶槭和雞爪槭主要成分是酯類物質(zhì)(50.0%以上),與張風(fēng)娟等[16]測(cè)定華北地區(qū)生長(zhǎng)的4種落葉類槭樹釋放成分一致;羊角槭釋放的α-蒎烯、β-蒎烯、乙酸葉醇酯、長(zhǎng)葉烯、長(zhǎng)葉環(huán)烯和石竹烯等物質(zhì),在宋秀華等[19]測(cè)試的元寶楓7月釋放VOCs中也檢測(cè)到。這可能與采集方法、發(fā)育節(jié)律[19]、外界條件[20]、生長(zhǎng)地域及親緣關(guān)系等因素有關(guān),槭樹釋放VOCs調(diào)控規(guī)律還需深入研究。

      萜類化合物在藥劑預(yù)防和治療心血管疾病、癌癥以及抗菌、抗炎、抗病毒、抗氧化劑、抗高血糖等生物活性方面扮演著一定角色[21]。石竹烯具有鎮(zhèn)靜、抗焦慮、抗抑郁[22],抗炎[22]和抗腫瘤活性[23];α-蒎烯[24]、3-蒈稀[25]、β-蒎烯[26]能抗炎鎮(zhèn)痛;羅勒烯是重要信號(hào)分子,抗菌殺蟲[27],抗白血病腫瘤細(xì)胞增殖[28];萜品油烯能有效抑制低密度脂蛋白氧化[29]。槭樹均釋放α-蒎烯、石竹烯等萜類物質(zhì),樟葉槭富含羅勒烯、α-蒎烯、3-蒈烯、β-蒎烯和萜品油烯,三角槭和毛脈槭主要釋放羅勒烯,羊角槭主要釋放石竹烯,推測(cè)所測(cè)槭樹有不同程度的保健功能,可作為保健型園林植物材料??嗖栝屎碗u爪槭富含的乙酸葉醇酯(63.1%,49.6%)是一種具有香蕉氣味的高級(jí)香料,推測(cè)其還可種植提取香精。萜類及C6~C10醇醛類物質(zhì)對(duì)細(xì)菌、真菌和放線菌有抑制作用[11,18,21],說明槭樹具有良好殺菌價(jià)值。建議在公園或小區(qū)的林蔭步道、鍛煉區(qū)、保健區(qū)等活動(dòng)場(chǎng)所適量配置槭樹,以抑制微生物、改善空氣質(zhì)量、預(yù)防疾病,發(fā)揮槭樹資源優(yōu)勢(shì),構(gòu)建優(yōu)美人居環(huán)境。

      4 參考文獻(xiàn)

      [1]DUDAREVA N, PICHERSKY E. Biochemical and molecular genetic aspects of floral scents[J]. Plant Physiol, 2000, 122(3):627 - 634.

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      Component analysis of volatile organic compounds from branches and leaves in seven Acer species

      WANG Qi, LIU Huahong, WANG Bin, ZHANG Rumin, GAO Yan
      (The Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Lin’an 311300, Zhejiang, China)

      Abstract:To analyze the volatile organic compounds(VOCs)released in Acer spp., VOCs from the branches and leaves of Acer ginnala, Acer palmatum, Acer buergerianum, Acer cinnamomifolium, Acer yangJuechi, Acer pubinerve, and Acer davidii were collected and analyzed by the dynamic headspace air-circulation method and thermal desorption system/gas chromatograhpy/mass spectrum(TDS-GC-MS). Results showed that the species of VOCs and their relative proportions varied significantly with species of Acer spp., A. ginnala and A. davidii released 17 and 20 kinds of VOCs, respectively, most of which were esters, aldehydes, and alcohols, such as 3-hexen-1-ol acetate, decanal,(Z)-3-hexen-1-ol, and nonanal. A. palmatum, A. buergerianum, and A. pubinerve released 15, 19, and 23 kinds, respectively, most of which were terpenes, esters, and aldehydes, such as ocimene, 3-hexen-1-ol acetate,(Z)-decanal, longifolene, and nonanal. A. cinnamomifolium released 24 kinds of VOCs, most of which were terpenes, such as ocimene,α-pinene, 3-carene,β-pinene, and terpinene. A. yangJuechi released 25 kinds, most of which were terpenes, aldehydes, and alcohols, such as decanal, longifolene, 2-ethyl-1-hexanol, caryophyllene, and nonanal. Thus, the health function of VOCs from these Acer species could be utilized in healthcare gardens.[Ch, 3 fig. 1 tab. 29 ref.]

      Key Words:botany;Acer;volatile organic compounds;TDS-GC-MS

      中圖分類號(hào):S718.3;S685.99

      文獻(xiàn)標(biāo)志碼:A

      文章編號(hào):2095-0756(2016)03-0524-07

      doi:10.11833/j.issn.2095-0756.2016.03.022

      收稿日期:2015-01-24;修回日期:2015-12-10

      基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目(31270756,31470704)

      作者簡(jiǎn)介:王琦,從事園林植物研究。E-mail:hankywang@hotmail.com。通信作者:王彬,實(shí)驗(yàn)師,從事植物生理生態(tài)研究。E-mail:wangbin@zafu.edu.cn

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