木质素降解酶系研究新进展   总被引：1，自引：0，他引：1  

张辉 《天津农业科学》2006,12(3):8-12

从木质素降解酶系的组成、作用机理、生理学研究、分子生物学研究四个方面对木质素降解酶系研究新进展进行了综述,并对木质素降解酶系在农业固体废弃物降解中的应用做了展望。  相似文献   

Multiple mechanisms account for resistance to sterol 14α-demethylation inhibitors in field isolates of Mycosphaerella graminicola     

Leroux P  Walker AS 《Pest management science》2011,67(1):44-59

  相似文献   

烟草木质素合成途径几个中间代谢物HPLC分析   总被引：1，自引：0，他引：1  

陶霞娟  赵艳玲  陈雪梅  王天华  蒋湘宁 《北京林业大学学报》2005,27(5):111-114

该文建立了烟草木质素生物合成途径几个中间代谢物咖啡酸（CA）、4 香豆酸（PA）和阿魏酸（FA）的RP-HPLC分析方法.用ODS-C18色谱柱分离、紫外波长扫描检测器检测，并确定320 nm为最佳检测波长；Ｖ（甲醇）∶V(水)（含1.5％乙酸）为20∶80，是最理想的流动相.该方法对CA、PA和FA的回收率分别为95.59%、93.67%、97.32%，相关系数（R[[sup]]2[[/sup]]）分别为0.994 6、0.994 6、0.994 5，满足定量分析要求.经测定，发现转基因烟草CA、PA和FA含量分别为未转化烟草的2.6～3.0、3.4～4.1和7.1～8.2倍.   相似文献   

温度对水稻突变体W1叶色及叶绿素生物合成的影响   总被引：29，自引：0，他引：29  

崔海瑞  夏英武  高明尉 《核农学报》2001,15(5):269-273

本文研究了温度对水稻突变体W1叶色及叶绿素 (Chl)生物合成的影响。W1是温敏型叶色突变体 ,叶色转变的临界温度约为 2 3℃。在高温下 ,突变体W1的Chl和类胡萝卜素 (Caro)含量与对照无显著的差异 ,幼苗呈绿色 ;低温 (1 5～ 2 0℃ )下W1的Chl和类胡萝卜素 (Caro)含量明显较低 ,表现白化。突变体W1白化苗中的Chla和Chlb含量同时下降 ,Caro Chl的比值增大 ,说明该突变体属于不是由Caro降低而导致的总叶绿素缺陷型。白化苗中Chl生物合成的中间产物原叶绿素 (酸 ) (Pchl)、镁原卟啉 (Mg proto)、原卟啉IX(ProtoIX)含量减少 ,而δ 氨基酮戊酸 (ALA)和胆色素原(PBG)大量积累 ,证明突变体W1低温下Chl生物合成卟啉原形成部位受阻  相似文献   

木质素吸附缓释性质及在肥料中的应用   总被引：2，自引：0，他引：2  

廖俊和  罗学刚 《中国土壤与肥料》2004,(5):43-45

综述了木质素的吸附缓释性质,介绍了其作为载体基质材料在肥料中的应用开发研究进展情况,为工业木质素的综合利用和解决造纸行业及由于普通肥料流失所带来的环境污染问题提供了一条新的途径。  相似文献   

高沸醇溶剂法提取花生壳中木质素的研究   总被引：6，自引：2，他引：6  

陈为健  程贤甦  方华书  陈跃先  李勉钧  陈云平 《花生学报》2003,32(2):7-11

采用1，4-丁二醇为溶剂，在70％～90％的1，4-丁二醇水溶液中添加少量助剂，在180～220℃条件下蒸煮30～90min，从花生壳中制得木质素。采用高沸醇溶剂法提取的木质素(简称HBS木质素)不溶于水，可以通过加水沉淀的方法，与反应后的液体混合物中分离。HBS木质素具有较高的反应活性，通过进一步的改性，还有更多潜在的应用价值。高沸醇溶剂(简称HBS)通过回收处理可以循环使用。  相似文献   

梁山慈竹体细胞突变体特性及分子水平变化     

周振华  胡尚连  徐刚  曹颖  卢学琴  龙治坚 《福建林学院学报》2015,(1):67-73

以同期生长的梁山慈竹体细胞突变体No.29植株和实生植株(对照)为材料,对其茎秆化学成分和光合生理相关指标进行测定,并基于RNA高通量转录组测序结果,对No.29植株的纤维素、木质素等合成有关的基因差异表达进行分析。结果表明,与实生植株相比,No.29植株具有较高的株高、胸径、茎秆的鲜重和干重以及纤维素含量、纤维长度和宽度;纤维素含量比实生植株高12.89%;外方和内方纤维股明显增大;灰分含量、卷曲指数和扭结指数明显降低;但发笋量、木质素含量和细小纤维含量没有明显差异。No.29植株中的Ces A、Su Sy、UDPase基因分别比实生植株上调了117%、205%、115%,转录因子MYB基因表达上调了214%,驱动蛋白基因表达上调了10倍,动力蛋白基因表达上调了760%。No.29植株纤维素含量与纤维形态上明显的改变有其遗传基础,为No.29的进一步研究与利用奠定了基础。  相似文献   

Study on Chemical Components of Alkaline Nitrobenzene Oxidation from Plantation Woods     

Yoich TOMIMURA 《中国林业科技(英文版)》2002,(2)

This paper deals with the chemical components and the chemical structure of lignin of Chinese fir and Poplar I-214 from plantationforest. The results revealed that the contents ofchemical component in heart wood and sapwood were almost the same except ethanol-benzene extract both in Chinese fir and in Poplar I-214, The contents of ash, holocellulose, α -cellulose, pentosan, ethanol-benzene extract and cold-water extract in Poplar I-214 were higher than that in Chinesefir, The content of lignin in Poplar I-214 was lower than that in Chinese flr. Vanillin, vanillic acid and p-hydroxybenzaldehyde were found in Chinesefir while vanillin and vanillic acid, p-hydroxybenzoic acid, syringaldehyde and syringic acid werefound in Poplar I-214 in investigation of the chemical structure of lignin by using nitrobenzene oxidization method.  相似文献   

Enzymes of Ammonia Assimilation and Transamination in Relation to Hybrid Vigour in Pearl Millet (Pennisetum americanum L. Leeke)     

S. V. Chanda    A. K. Joshi    P. P. Vaishnav  Y. D. Singh 《Journal of Agronomy and Crop Science》1988,160(2):125-131

Changes in the activities of enzymes of ammonia assimilation viz., glutamate dehydrogenase (GDH), glutamine synthetase (GS) and glutamate synthase (GOGAT), together with the activities of glutamate oxaloacetate transaminase (GOT) and glutamate pyruvate transaminase (GPT) were analysed in the topmost fully expanded leaf of pearl millet (Pennisetum americanum L. Leeke) hybrid BJ-104 , and its parents, J-104 and 5141-A , during the entire period of growth in field. Ammonia assimilation enzymes showed strong ontogenic trends and the hybrid attained activities either equal to the better (male) parent or showed better parental heterosis. In contrast to this both GOT and GPT activities were slightly higher than the poor (female) parent. The role of these enzymes in relation to chlorophyll synthesis and transport of metabolites from cellular compartments of C₄ plants, are discussed. Surveying the literature on attempts to propose biochemical criteria for hybrid vigour, it is proposed that there cannot be a universal criterion, rather rate limiting steps in different cultivars should be searched.  相似文献   

NOVEL SYNTHETIC METHOD OF LINGNINAMINETYPE ASPHALT EMULSIFIER     

Wu Baoguo Yang Yirong Pan Xuefeng Wang Xiaoshui Liu Guangping Northeast Forestry University 《林业研究》1992,(1)

The slurry sealing with cationic emulsified asphalt,which is a new technique inhighway construction,is rapidly extended at home and abroad.The technique should apply an ex-cellent slow set cationic cmulsifier.Now,slow set emulsifiers are ligninamines which are synthesizedby trimethylamine-epichlorohydrin route.Owing to high price and unstable quality,the extendingof slurry sealing technique is affected seriously.We prepare the ligninamine by a novel syntheticmethod.By the novel method,the cost of production is reduced by more than 30%,and the prod-ucts have stable quality,high emulsifying function and broad daptability for various asphalts.Thenovel synthetic method uses soda lignin,secondary amines and inexpensive aminating assistants asraw materials.The technological process of the method may use either one or two-step process,andthe technological condition are uncomplicated and easy to master.master.  相似文献