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The ethanolic extract of the bark of Syzygium cumini was investigated for its anti-inflammatory activity in animal models. The extract did not show any sign of toxicity up to a dose of 10.125 g/kg, p.o. in mice. Significant anti-inflammatory activity was observed in carrageenin (acute), kaolin-carrageenin (subacute), formaldehyde (subacute)-induced paw oedema and cotton pellet granuloma (chronic) tests in rats. The extract did not induce any gastric lesion in both acute and chronic ulcerogenic tests in rats. Thus, the present study demonstrated that S. cumini bark extract has a potent anti-inflammatory action against different phases of inflammation without any side effect on gastric mucosa. 相似文献
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《林业研究》2021,32(1)
The Atlantic Forest is one of the largest and most biodiverse rainforests of South America but anthropogenic activities are drastically changing these landscapes.The invasion of alien or exotic species is one of the greatest threats to biodiversity.There are few studies of invasive species in tropical Brazilian ecosystems.This research examines growth and ecological aspects of Syzygium cumini and Clitoria fairchildiana,two invasive tree species in the Pedra Branca State Park,an Atlantic Forest remnant in southeastern Brazil.Both species were successfully dated,indicating an average age of 58 and 31 years,respectively.A positive relationship between growth and precipitation of the previous growing season suggests an ecological adaptive strategy,which could be facilitating their invasion into the environment.Cumulative growth diameter curves indicate slow and fast growth rates for S.cumini and C.fairchildiana,respectively.Growth release episodes detected in the tree rings indicate increased anthropogenic disturbances over the last 50 years. 相似文献
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通过引种9种阔叶树种种植比较试验,试验结果表明马占相思、大叶相思、海南红豆、海南蒲桃在该地方生长速度较大,是该地区营造生态林的优势树种。 相似文献
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东莞生态公益林改造树种的早期生长季节节律及其与气候条件的关系 总被引：2，自引：0，他引：2
对东莞板岭生态公益林林分改造所用的55个树种的基径和树高生长量按季节进行调查,为期2年,结果显示：春分～秋分是这些树种的生长峰期.对大多数树种而言,温度对生长量的影响最大,其次是降水、日照时数,春分～夏至期间的水热条件最适宜树木的生长.进一步分析发现猫尾木、吊瓜木、楠木、云南石梓、米老排、香椿、阴香对水热条件较敏感,红锥、密花树、蓝花楹、竹节树、樟树、火力楠、西南荷、格木对水热条件的适应性较强;猫尾木、吊瓜木、云南石梓、石梓、乌墨、木波罗、扁桃性喜高温多雨,生长最高峰出现在夏至～秋分;肖蒲桃、格木、木波罗、乌墨、华杜英受日照时数的影响较大,密花树、猴欢喜、长叶竹柏、蓝花楹、竹节树、扁桃受日照时数的影响较小.这对植物引种和树种选择有一定的指导意义. 相似文献
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水淹胁迫对尖叶杜英和水蒲桃幼苗生理特征的影响 总被引：2，自引：0，他引：2
以尖叶杜英和水蒲桃幼苗为试验材料,人工模拟水淹胁迫环境,共设置水位在土壤表面和土表上5 cm处2种水淹强度,分别水淹7、14、21、28、35天以及水淹35天后恢复正常生长7天,测定幼苗叶片的叶绿素、可溶性糖、可溶性蛋白、超氧化物歧化酶(SOD)、丙二醛(MDA)含量。结果表明:随着水淹深度的增加,尖叶杜英幼苗的叶绿素含量多显著低于对照,水蒲桃幼苗的叶绿素含量一般大于对照;2种幼苗的可溶性糖含量一般都高于对照,水蒲桃叶片可溶性糖含量的增幅大于尖叶杜英。2种幼苗在水淹深度为5 cm时的可溶性蛋白质含量均显著小于对照。除了水淹35天外,2种幼苗其他水淹处理的SOD活性均显著大于对照;尖叶杜英幼苗的MDA含量比对照显著增加,而水蒲桃幼苗的MDA含量保持稳定。由叶绿素、可溶性糖和丙二醛的变化来判断,水蒲桃的抗水淹能力强于尖叶杜英。 相似文献
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First report of Lasiodiplodia theobromae and Pseudofusicoccum stromaticum causing dieback in Syzygium malaccense tree in Brazil 
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下载免费PDF全文 G. F. Silveira M. P. Melo J. W. M. Teixeira D. C. Viana J. D. C. Silva J. E. A. Beserra Jr 《Forest Pathology》2018,48(2)
Syzygium malaccense is a woody species, known as Malay apple, which is grown as an ornamental or for fruit production in Brazil, mainly in the northern and north‐eastern regions. A high incidence of dieback has been observed in Malay apple in ornamental situations, including streets and gardens. Morphological identification, sequencing analysis of TEF+ITS gene regions and a pathogenicity test confirmed that fungi in the Botryosphaeriaceae cause the disease. This is the first report of Lasiodiplodia theobromae and Pseudofusicoccum stromaticum causing dieback on S. malaccense trees in Brazil. 相似文献
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Wesley Dáttilo Rodrigo L. Martins Vera Uhde Janaína C. Noronha Fernando P. Florêncio Thiago J. Izzo 《Agroforestry Systems》2012,85(1):105-111
The fruit production of flowering plants critically depends on the pollination services provided by animals that compete for flower resources. The output of competitive interactions between ants and bees for inflorescences of jambolan Syzygium jambolanum (Myrtaceae) in an agroforestry system in Brazilian Meridional Amazonian are an interesting system of investigation due the possibility to control variables experimentally. In 20 S. jambolanum individuals we performed 300 treatments in different inflorescences of two strata (upper and lower) as follows: (1) ants exclusion, (2) bees exclusion, and (3) control group where ants and bees could access the inflorescences. There was no difference in the number of inflorescences, volume of nectar and sugar concentration between the strata. Also the visitors considered are distributed equally in the tree??s stratum. When bees were prevented from access the inflorescences, ants dominated more inflorescences only in the lower stratum. On the contrary, when ants were excluded, bees visited more inflorescences only in the upper stratum. We conclude that ants prevent the access to bees and vice versa as the result of different ability of resource utilization and foraging strategies. Thus, preventing the access of ants to the floral nectar could increase the level of nectar available to pollinators of S. jambolanum, thereby increasing productivity and reducing economic losses. 相似文献
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为了开发木材变色防治用的天然环保产品,选用19种植物精油,依据精油的挥发速率及其对培养基中变色菌的抑菌效力,筛选综合性能较优的精油产品。结果表明,植物精油的挥发速率为7.9~550.8g·m^-2·h^-1,迷迭香和丝柏精油挥发较快,而雪松、肉桂和安息香精油挥发较慢。随着植物精油的体积分数由0.01%提高至0.05%,其对可可球二孢和串珠镰刀菌的平均抑菌效力分别由19%和21%增加至50%和59%,抑菌性能明显增强。以抑菌效力为变量的聚类分析表明,肉桂、丁香花、柠檬草和百里香4种植物精油对两种变色菌表现出较优的抑菌特性,其在体积分数0.05%条件下的抑菌效力达到100%。综合考虑抑菌效力和作用持久性,肉桂、丁香花和柠檬草精油是防治可可球二孢和串珠镰刀菌的较优品种。 相似文献
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五桂山位于广东中山市东南沿海,其东南坡向的海岸带迎风坡性质明显。在造林4年和1年的两块林地上,分别建立两条跨越迎风坡和背风坡的固定样带,对样带的调查研究结果表明：只要实行高强度营林措施,适地适树,海岸带坡地退化生态系统是可恢复森林植被的;根据参试树种的早期生长表现,大叶相思、西南桦、台湾相思、米老排、红锥、厚荚相思、海南蒲桃等的生长速度较快,海南红豆和云南石梓的生长速度则较慢,这两种树种不太适宜在迎风坡造林;在采用相对密植的前提下,林分郁闭前迎风坡造林树种的死亡率高于背风坡,郁闭后则背风坡较高,为尽快形成森林小环境,建议迎风坡的造林密度应大于背风坡;在造林措施相同的条件下,背风坡林木生长量、物种多样性和林分质量明显优于迎风坡,说明海岸带坡向因子对植被恢复具有显著影响。 相似文献
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Ahuja Nitina Batish Daizy R. Singh Harminder Pal Kohli Ravinder K. 《Journal of pest science》2015,88(1):209-218
Journal of Pest Science - The present study investigated the phytotoxic potential of eugenol, a major component from the essential oil of clove [Syzygium aromaticum (L.) Merrill and Perry], towards... 相似文献
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I. O. O. Aiyelaagbe 《Agroforestry Systems》1994,27(1):1-16
The cashew-coconut system in the Coast Province of Kenya was appraised to determine the efficacy and adoption potential of a fruitcrop based agroforestry intervention designed to increase the productivity of the system. Fruitcrops on farmers plots ranged between 16–22 species. They featured mainly as understorey trees in cashew-coconut plots and upper storey of foodcrop plots. Fruit tree management was generally poor.Between 67–100% of farmers interviewed were interested in planting more fruit trees on their farms. Envisaged cash generation was a major reason for their interest. Preferred species were generally adapted exotics. Preference was in the order ofMangifera indica, Citrus sinensis, C. reticulata > Cocos nucifera, Anacardium occidentalis, Carica papaya > Passiflora edulis var. flavicarpa,Ananas comosus, Syzygium cumini, Citrus limon, Musa sapientum, Persea americana > Musa paradisiaca, Citrus aurantifolia Annona spp. Locational differences existed in exact order of preference within the groupings. Constraints to fruit production included lack of improved fruit tree seedlings, low proficiency in fruit seedling production, transportation, no capital for initial investment, damage by wild animals, prolonged dry spells, and frequent die back of fruit trees. Based on its high adoption potential, a fruitcrop based agroforestry intervention is recommended for increasing the productivity of the cashew-coconut system of Kenya.Possible agroforestry technologies in which fruitcrops could feature are discussed. 相似文献
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【目的】植物精油是一类安全环保且具有抑菌特性的天然产物,在木材霉变防治领域的应用潜力很大。开展植物精油对我国常见木材霉菌及变色菌的综合抑菌效力的研究,可为天然环保型木材霉变防治剂的开发提供重要依据。【方法】配制经植物精油修正的马铃薯葡萄糖琼脂培养基,通过评价霉变菌在培养基中的生长状况,对比分析19种植物精油对6种木材霉变菌的抑菌效力。【结果】在体积分数为0.05%的条件下,19种植物精油对黑曲霉Aspergillus niger、桔青霉Penicillam citrinum、绿色木霉Trichoderma viride、可可球二孢Botryodiplodia theobromae、串珠镰刀菌Fusarium moniliforme和链格孢霉Alternaria alternata的抑菌效力分别为0~100%、0~100%、0~100%、0~100%、11%~100%和20%~100%。聚类分析表明,肉桂、丁香花和百里香精油的综合抑菌效力最高,在体积分数0.05%的条件下对6种霉变菌的抑菌效力均达到100%,而尤加利、甜橙和松树精油的综合抑菌效力最低。相关分析表明,植物精油对6种霉变菌的抑菌效力之间均表现出显著相关性(P=0.01),其Pearson相关系数为0.777~0.959。【结论】不同植物精油的抑菌效力之间表现出较大差异,肉桂、丁香花和百里香精油是可以用于木材霉变防治的较优品种。 相似文献
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以深圳地区8 种常见生态公益林树种的叶为研究对象,采用固相微萃取（SPME）收集挥发物
质（VOCs）成分,通过GC-MS 对VOCs 进行分离鉴定,并通过各峰质谱图进行标准谱库检索,以质谱
和KI 值的参比匹配和峰面积归一法确定挥发性物质成分及其相对含量,结合相关文献确定其保健功效。
麻楝Chukrasia tabularis、海南蒲桃Syzygium hainanense、红鳞蒲桃Syzygium hancei、乐昌含笑Michelia
chapensis、深山含笑Michelia maudiae、樟树Cinnamomum camphora、华润楠Machilus chinensis、枫香
Liquidambar formosana 分别鉴定出高匹配挥发物质17、20、21、28、24、21、30、21 种,占各自挥发性
总成分的80.21%、86.38%、98.08%、75.32%、98.83%、93.27%、95.25%、95.51%。经分析得出,有益
呼吸系统挥发物含量较高的有海南蒲桃、红鳞蒲桃、深山含笑、华润楠,有益心血管系统挥发物含量较
高的有深山含笑、华润楠,镇痛镇静挥发物含量较高的有红鳞蒲桃、华润楠,抗菌杀菌挥发物含量较高
的植物有红鳞蒲桃、深山含笑、华润楠,驱虫杀虫挥发物含量较高的植物有深山含笑。总体上,所试材
料中,红鳞蒲桃、深山含笑、华润楠3 种植物的保健作用较为广谱和突出。 相似文献
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研究了不同人为干扰强度对甜槠天然群落中主要种群甜槠和赤楠的分布格局的变化动态.结果表明,人为干扰会使甜槠种群的聚集性加强,而赤楠种群的聚集性降低.干扰强度对甜槠聚集性的影响随树龄的增大而逐渐减小,而对赤楠聚集性的影响则是随林龄增大呈现由小→大→小的规律. 相似文献
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继云南6种阔叶材的识别与利用研究之后,又就1989年从西双版纳普文林区采集到的窄序崖豆树、亮叶围诞树、假樱叶杜英、鹅掌柴、幌伞枫、镰尖蕈树、滇西蒲桃和簇花蒲桃的木材标本,对滇产的这8种树种的木材识别特征及利用途径进行了研究.依据研究结果,对这些树种的木材宏观构造、微观构造及物理力学性质作了报道,提出了它们的利用价值. 相似文献