外生菌根真菌——厚环乳牛肝菌发酵条件的研究^*          下载免费PDF全文

王学聘  赵志鹏  郭秀珍 《林业科学研究》1990,3(4):310-313

本文对外生菌根菌－厚环乳牛肝菌（Suillus grevillei(Kl.)Sing.)8001菌株的发酵条件进行了研究，其中培养基初始PH以4．5－5．6为宜，装液量选为150ml/500ml三角瓶，该菌株不需要特殊的碳源和氮源。14L发酵罐液体深层发酵结果表明，8001菌株具有发酵周期短、生长迅速、易于工业化生产等特点，本研究为外生菌根菌剂的大规模工业化生产提供了理论依据。  相似文献   

漆酚—邻苯二酚氧化还原树脂：Ⅰ结构分析     

雷福  喻宗源 《林产化学与工业》1993,13(3):233-238

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河北零叶蝉的研究     

梁丽娟  栾景仁  郭素萍  蔡平 《河北林果研究》1995,(1)

河北零叶蝉系一新种，是吸食柿树叶片汁液的害虫。分布河北、安徽。此虫在河北西部山区１年发生２代或３代，以卵在柿树当年生小枝皮层内越冬。在大发生地区，可用４０％氧化乐果喷冠、涂干或干基钻孔挂瓶输药进行化学防治。天敌有日本高姬蝽、红点平盲蝽、紫斑突额盲蝽、碎斑平盲蝽等。  相似文献   

香菇多糖提取纯化研究   总被引：8，自引：0，他引：8  

卢成英  李国章  黄早成  郭晓辉  曹庸 《中国林副特产》2006,(4):5-7

用0.2mol/L三氯乙酸、0.2mol/L氢氧化钠、1.0mol/L乙酸、蒸馏水为提取溶剂,结合超声波处理等方法从香菇子实体中提取香菇多糖,提取液经甲醇除杂、沉淀处理得粗多糖。粗多糖用CTAB络合沉淀,沉淀物乙酸溶解后取上清再用甲醇沉淀,沉淀物冻干得纯化多糖。分析检测结果显示干香菇三氯乙酸提取的纯化多糖的含量高达93.1%、提取得率达0.324%。薄层分析表明,纯化香菇多糖由葡萄糖、甘露糖、半乳糖、木糖组成。纯化多糖用Sephadex G-100凝胶层析,洗脱液经苯酚-硫酸法检测为单一吸收峰,红外光谱显示其具有多糖类的特征吸收峰。  相似文献   

Comparative study on antioxidative system in normal and vitrified shoots of Populus suaveolens in tissue culture     

Lin Shanzhi  Zhang Zhiyi  Lin Yuanzhen  Liu Wenfeng  Guo Huan  Zhang Wei  Zhang Chong 《中国林学(英文版)》2004,6(3):1-8

To explore the physiological and biochemical mechanism of the occurrence of vitrified shoots of Populus suaveolens in tissue culture, the changes in water, chlorphyll, lignin, H₂O₂, phenylalanine ammonialyase (PAL), malonaldehyde (MDA), protective enzymatic systems, and some key enzymes involved in the ascorbate- glutathione cycle were comparatively studied in both normal and vitrified shoots of P. suaveolens. The results show that the lower activities of peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR), glutathione reductase (GR) and PAL, and the less contents of chlorphyll, lignin, ascorbate (ASA) and reduced glutathione (GSH) as well as the lower ratios of ASA / DHA and GSH / GSSG are observed in vitrified shoots than in normal ones during the whole culture period. While in comparison with normal shoots, the higher activity of superoxide dismutase (SOD) and the more concentrations of water, H₂O₂, MDA, dehydroascorbate (DHA) and oxidized glutathione (GSSG) are found in vitrified shoots. Statistical analysis indicates that the enhanced activity of SOD and the decreased activities of CAT and POD as well as some enzymes involved in the ascorbate-glutathione cycle might be closely correlated to the accumulation of H₂O₂. The less regeneration of ASA and GSH and the lower capacity of the ascorbate-glutathione cycle observed in vitrified shoots might be due to a significant decrease in APX, MDAR, DHAR and GR activities and a decline in redox status of ASA and GSH. The decreases in chlorphyll content might result in a decline in photosynthesis. The lower activities of POD and PAL could result in the decrease of lignin synthesis and cell wall ligination, which might be the key factor leading to the increase in water content. It is concluded that the deficiency of detoxification capacity caused by the lower capacity of the ascorbate-glutathione pathway and the decreased activity of protective enzymatic system might lead to the large accumulation of H₂O₂ and the enhancement of membrane lipid peroxidation, which might be the main cause leading to the occurrence of vitrifying shoots of P. suaveolens in tissue culture. [Supported by National Natural Science Foundation of China (Grant No. 30271093) and the Foundation of State-designated Base for Biology Researching and Teaching in Beijing Forestry University]  相似文献   

云南松花粉精粉及其加工产品的成分分析及评价     

范国栋  刘嘉宝  冯武 《西部林业科学》2002,(3):86-89

对以云南松破壁松花粉为原料 ,采用具创新性生物技术研制的云南松花粉脂提物精粉、活性酶精粉、黄酮精粉、营养及活性物质精粉 ,以及用此 4种精粉经加工而获得的亚油酸软胶囊、口服 0 #胶囊、黄酮药片 (胶囊 )、精粉口服液和松花粉酮酒 5种产品的成分进行了分析 ,了解到它们相关成分的含量。分析结果表明 ,4种云南松花粉精粉具有速溶性好、营养及生物活性物质集中的特点 ,其主要营养及生物活性物质含量数倍于破壁松花粉。以其为原料加工的各项产品很好地保留了精粉的主要功能成分 ,因而对人体具有更高的保健、医疗功效。  相似文献   

Carbon return and dynamics of litterfall in natural forest and monoculture plantation of Castanopsis kawakamii in subtropical China     

Guo Jianfen  Xie Jinsheng  Lu Haoliang  Liu Dongxia  Yang Yusheng  Chen Guangshui 《中国林学(英文版)》2004,6(1):33-36

The amount of carbon returned through litterfall and its seasonal pattern were studied in a natural forest of Castanopsis kawakamii (NF) and adjacent monoculture plantations of C. kawakamii (CK) and Chinese fir (Cunninghamia lanceolata) (CF) in Sanming, Fujian Province, China. Mean annual carbon return through total litterfall over 3 years (from 1999 to 2001) was 5.097 t·hm⁻² in the NF, 4.337 t·hm⁻² in the CK and 2.502 t·hm⁻² in the CF respectively. Of the total carbon return in the three forests, leaf contribution accounted for 58.96%, 68.53% and 56.12% and twig 24.41%, 22.34% and 26.18%, respectively. The seasonal patterns of carbon return from total litterfall and leaf-litter were quite similar among the three forests. A peak of carbon input from litterfall in the NF and the CK occurred in spring except for the highest annual C return through branch litter of the NF in summer, while the CF showed the maximum C return in summer. The results of this study demonstrate that the natural forest has a greater C return through litterfall than monoculture plantations, which is beneficial to the increase of soil organic matter storage and the maintenance of soil fertility. [Supported by the Teaching and Research Award Program of MOE P.R.C. (TRAPOYT) and the Key Basic Research Project of Fujian Province (2000F004)]  相似文献   

温度对大叶桃花心木(Swietenia macrophylla King)幼苗叶片的光合影响   总被引：2，自引：0，他引：2  

张成军  祖元刚  郭佳秋 《林业研究》2003,14(2):130-134

本文研究了大叶桃花心木（Swietenia macrophylla King）一年生幼苗在经过夜温处理后的光响应曲线和在饱和光强下的CO2反应曲线.结果表明:在大气CO2浓度下,叶片的最佳光合作用温度在25-31℃之间,而在饱和CO2浓度下为31-35℃.在25℃以下光合速率开始降低,主要是由于羧化效率的降低,而当温度超过31℃时,光合速率下降,是因为羧化效率的降低和呼吸速率的增加.CO2浓度对光合的促进作用在低温下受到抑制,这意味着未来在CO2浓度增高的情况下,高浓度的CO2对热带常绿植物光合的促进在冬天低温情况下表现不十分明显.图4参23.  相似文献   

高温水供热干燥速生杉木方材     

涂登云  顾炼百  杜国兴 《木材工业》2001,15(5):31-32,34

运用高温水供热系统干燥速生杉木方材。生产性试验表明，6天内初含水率为55．5％的杉木方材干至始含水率5．4％，干燥质量符合细木工板生产的要求（少数高含水率木材除外）。此干燥法集中供热，具有热效率高、运行安全和经济可行等特点。  相似文献   

如皋市双条杉天牛的发生及综合防治   总被引：3，自引：0，他引：3  

沈继珍  高国兴  丁海琴  陈建华  许小林 《江苏林业科技》2001,28(4):34-36

对双条杉天牛从形态特征、生物学特性、寄主范围、危害率等方面进行了调查，并提出了防治双条杉天牛的对策和措施。  相似文献