Abstract:The developmental process of Achyranthes bidentata roots was examined by anatomical methods.It was shown that the development of A.bidentata roots included five developmental stages,promeristem,primary meristem,primary structure,secondary structure and te

Abstract:In Salvia miltiorrhiza ,the microsporogenesis and male gametophyte developments with their relativity to the morphologies of flower buds at different developmental stages were microscopically examined. It was shown that Salvia miltiorrhiza has two stamens

Abstract:The male gametophyte development of autotetraploid radish(2n=4x=36) was examined by Ehrlich's hematoxylin staining-methyl salicylate clearing and is reported for the first time in the paper.It was shown that in autotetraploid radish the microspores produc

Abstract:Chromosome numbers and karyotypes of seven populations,which were located in Hengduan Mountains belonging to two species of Pleurospermum Hoffm.,P.franchetianum Hemsl.and P.hookeri C.B.Clarke var.thomsonii C.B.Clarke and two species of Pimpinella L.,P.div

Abstract:GmCO and GmFT,two congeners of CO and FT,were isolated from soybean by homology-based candidate gene method from soybean for studying if the photoperiod response was regulated by CO and FT,the genes controlling the flowering time of soybean.GmCO and GmFT

Abstract:以嘎拉苹果的叶片为转化受体,应用超声波法将菜豆铁蛋白基因导入受体中.实验表明,以0.5 W/cm2的声强、25℃、20 min超声波处理的转化效果最佳,抗性愈伤组织的比例高达24%.抗性愈伤组织经诱导获得了16个苹果抗性植株,有11株表现出GUS阳性,阳性比率为2.75%.经PCR检测,11株GUS阳性植株中有6株能扩增出目的条带;而Southern blotting实验表明,菜豆铁蛋白基因仅在2个苹果转基因株系的基因组中实现了完整插入,并且杂交的信号较强;进一步RT-PCR检测实验显示,外源菜豆铁蛋白基因在上述2株转基因植株中并未转录,发生了基因沉默.

Abstract:Two watermelon hybrid varieties,'Heigongzi' and '04-17',and their parental inbred lines were used to study the polymorphorism of amplifiable spectral bands in hybrids and their parents by SSR marker in order to detect true and fake hybrid seeds.Of the 52

Abstract:The genetic diversity of Dioscorea bulbifera L.was investigated with fourteen D.bulbifera accessions by ISSR.Nine polymorphic primers were screened from fifty five ISSR primers and seventy bands were amplified with the nine primers;the bands included sixt

Abstract:The fertilization and early embryo development in the cross of common wheat Chinese spring(CS) and its mutant CSph2b were examined.It was shown that a majority of pollens produced by Qinling rye(Secale cereale cv.Qinling) could germinate on the stigmas of

Abstract:The stems and leaves of Rhodiola crenulata, Rhodiola yunnanensis, Rhodiola fastigiata and Rhodiola sachalinensis were in vitro cultured as the explants, the stems of Rhodiola crenulata and the leaves of Rhodiola yunnanensis ,Rhodiola fastigiata and Rhodio

Abstract:以3个普通小麦杂交组合的F1群体为材料,研究了小麦花药离体培养中Cu2 对花药组织脱分化和再分化特性的影响.结果表明,诱导培养基中的Cu2 对小麦花药愈伤组织的诱导及再分化均有影响,均表现为低浓度下的促进作用和高浓度下的抑制作用,最适Cu2 浓度为0.15μmol/L.在该浓度下,3个供试材料的出愈率分别比对照提高了239.14%、214.72%和80.00%,反应率分别比对照提高了156.70%、151.86%和65.96%,绿苗分化率分别比对照提高了200.05%、241.87%和333.49%.再分化培养基中的Cu2 对小麦花药愈伤组织的再分化有明显的负向效应,3个供试材料中,均以不附加Cu2 的对照的绿苗分化率最高,分别为70.00%、66.67%和39.29%,附加不同浓度的Cu2 后,绿苗分化率显著下降.

Abstract:Mature seeds of creeping bent grass were used to study the effects of 2,4-D on embryonic callus induction and plantlet regeneration of creeping bentgrass and observe somatic embryogenesis of creeping bent-grass.The experiment results showed that the callu

Abstract:The surface of tomato stems were chemically disinfected and 17 strains of endogenetic bacteria were obtained from the stems by spread plate and streak plate methods.The morphological observation and physiological and biochemical identification of the stra

Abstract:采用真空干燥、冷冻干燥、微波干燥、蒸后烘干、烘干和晒干等6种干燥技术对大白期金银花花蕾外观性状及内在品质的影响进行分析研究.结果表明:(1)微波干燥、蒸后烘干和冷冻干燥所获得的金银花外观品质好;(2)从水溶出物量和醇溶出物量上看,微波干燥、蒸后烘干和晒干技术所获得的溶出物量高;用比色法和HPLC法检测显示,蒸后烘干样品中有效成分———绿原酸、总黄酮含量最高,其次是微波干燥法,而烘干样品中含量最低;(3)不同干燥技术对金银花中营养成分———游离氨基酸和可溶性糖含量的影响以及对药用有效成分的影响不同,因此金银花作为药材使用时应选择蒸后烘干技术进行初加工;(4)晒干、冷冻干燥和微波干燥3种干燥方法对金银花挥发油主要组分种类没有产生影响,但相对质量分数仍有明显差异,只有晒干的金银花挥发油中检测出了9,19-环化-羊毛甾烯醇,而微波干燥的样品中维生素E含量最高,挥发油中γ-5-谷甾烯-3-醇、5,2-豆甾二烯-3-醇、菜籽甾醇相对含量较其它方法明显高出很多.因此,蒸后烘干和微波干燥技术可作为规模化干燥加工金银花的最佳方法.

Abstract:以26个大蒜品种为试验材料,分析了不同品种不同生长期和不同产品器官硝酸盐积累特点,结果表明:大蒜不同生长时期和不同产品器官中硝酸盐积累量不同,叶片和叶鞘中硝酸盐含量在生长旺盛的春季(4月5日)和早春(3月14日)明显高于冬季(1月7日);不同器官以蒜苗中最高,蒜薹中次之,蒜头中最低;蒜苗中硝酸盐含量多为叶鞘高于叶片.大蒜不同品种间叶鞘、叶片、蒜薹和蒜头中硝酸盐含量均有极显著差异,按照沈明珠等的4级分类标准,3个品种叶鞘中,9个品种叶片中,4个品种蒜薹中,22个品种蒜头中的硝酸盐含量均低于432 mg/kg,属轻度积累;大蒜中硝酸盐含量最高仅达到三级(785~1 440 mg/kg),属高度积累.依据国家标准(GB18406.1-2001),大蒜不同品种的各产品器官中硝酸盐含量均未超出限量指标.

Abstract:采用营养液栽培系统,以黄瓜品种中农8号为材料,研究了Ca2 对根际低氧胁迫下黄瓜幼苗体内超氧阴离子(O2?-)、过氧化氢(H2O2)、丙二醛(MDA)含量和超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)、谷胱苷肽还原酶(GR)活性的影响.结果表明:低氧胁迫下黄瓜体内活性氧含量和保护酶活性均高于对照;低氧缺钙处理的活性氧含量最高,而保护酶活性却较低;营养液Ca2 浓度提高到8mmol/L后,显著降低了低氧胁迫下黄瓜幼苗体内MDA、H2O2含量和O?2-产生速率,提高了SOD、POD、CAT、APX、GR活性,说明Ca2 可减少低氧胁迫下黄瓜幼苗体内活性氧的产生,提高抗氧化酶的活性、降低膜脂过氧化水平,减缓低氧胁迫对植株的伤害,增强黄瓜幼苗对低氧逆境的适应性.

Abstract:采用营养液水培的方法,研究了外源一氧化氮(nitric oxide,NO)对50 mmol?L-1NaCl胁迫下黄瓜(Cucu-mis sativusL.)幼苗根系和叶片内硝酸还原酶(nitrate reductase,NR)活性、硝态氮(NO3--N)、铵态氮(NH4 -N)及可溶性蛋白含量的影响.结果表明:100μmol?L-1外源NO供体硝普钠(sodium nitroprusside,SNP)能明显提高NaCl胁迫下黄瓜幼苗叶片和根系内NR的活性,缓解由于盐胁迫造成的NO3--N含量的下降,减少NH4 -N在植株体内的过量积累,提高渗透调节物质可溶性蛋白的含量,从而减轻由于盐胁迫对黄瓜幼苗植株造成的伤害.

Abstract:Using 'Kagemusya'(Lycopersicon esculentum Mill.) as the root stock and 'Baoda 903' as the scion the study investigated biomass,Na~ ,K~ ,Ca~(2 ),Mg~(2 ) and Cl~-differences between grafted seedlings and own-root seedlings of tomato under NaCl stress.It sho

Abstract:The salt-tolerant physiological characteristics of 'Dekang 961' were indoor examined under the stress resulting from 200 mmol/L NaCl in terms of water retention and anti-oxidation protection with those of 'Shannong 215953',a high yield wheat variety,as th

Abstract:The chlorophyll contents,photosynthetic rates and chlorophyll fluorescence kinetic parameters of xantha wheat mutants and its parent(Xinong 1718) were comparatively studied.It was shown that(1) The total chlorophyll contents in golden,greenish-yellow and

Abstract:The allelopathic effects of salicylic acid stress on membrane lipid peroxidation and osmosis-regulating substances in two well performing Chinese fir clones(referred to as 01 and 02) were studies.It was shown that(1) salicylic acid appeared to limit the M

Abstract:Three plants were chosen as the experimental materials and the daily carbonic anhydrase activities and net photosynthetic rates in their leaves and pods as well as their leaves at different positions and pods with different lengths were determined.It was

Abstract:With Li-6400 portable photosynthesis system,the photosynthetic characteristics of six plants species in the communities of forest-formed Quercus aliena var.acuteserrata in Huoditang Forest Region,were investigated.It was shown that(1) in the community,the

Abstract:The study measured the leaf reflectivity of the flue-cured tobacco variety 'Zhongyan101' and anatomically observed the leaf tissue structure of the varieties to analyze the relation between the two and investigate the effects of leaf maturity,leaf positio

Abstract:The experiment about the grazing intensities of yak in alpine Kobresia parva meadow revealed that(1)at different grazing intensities the aboveground biomasses extremely significantly differed from the total aboveground biomass in different plant groups,th

Abstract:The plant community structure and its spatial dynamics in natural Pinus yunnanensis forest region,which belonged to Yipinglang Forest Farm of Lufeng County,Yunnan,were field investigated in April 2005.It was shown that the species compositions became rich

Abstract:The species,heights,diameter breast heights,canopy widths and plant numbers in 38 quadrats of 6 belt transects,which were located in Yingsu Crosssection and Kaerdayi cross-section lying in the lower reaches of Tarim river where Populus euphratica concentr

Abstract:Belonging to Nartheciaceae,Aletris L.has twenty three species and one variety of which there are 18 species and one varieties in east Asia and five species in the southern part of North America,so that it is a genus with a typical East Asia-North America

Abstract:The fertilization and embryo development of Thellungiella hallophila(C.A.Mey.)O.E.Schulz were observed by light microscopy and paraffin sectioning.The results showed that the karyomixis in fertilization occurred around the full blooming stage and two pola

Abstract:从蓝桉(Eucalyptus globulusLabill.)果实乙醇提取物的石油醚部位分离鉴定出6个化合物,通过理化和波谱分析结构鉴定为:5-羟基-4′,7-二甲氧基-6-甲基黄酮(1)、blumenol A(2)、蓝桉醇(3)、绿花白千层醇(4)、β-谷甾醇(5)、二十二烷酸(6),其中化合物1~4和化合物6系首次从该植物中分离得到,化合物1和2首次从桉属植物中分离得到.

Abstract:The root secreta of Haloxylon ammodendron(C.A.Mey.) Bunge seedlings of different ages,which grew under nearly natural conditions,were collected through cyclic irrigation and the components and component contents of the secreta were determined by Gas chrom

Abstract:Root biomasses,soil organic carbon contents and soil carbon contents in Robinia pseudoacacia, Pinus tabulaeformis and Platycladus orientalis plantations in the northern slope of Qinling Mountain were investigated. It was shown that the three plantations d

Abstract:Pea has many multi-genetic quantitative traits under multi-genetic control and QTL mapping determines genomic positions of the genes that control quantitative traits relying on the relation between molecular markers and QTL by means of molecular markers,o

Abstract:Jasmonic acid and its derivative methyl jasmonate,collectively called jasmonates,are phyto-regulators existing widely in plants and playing an important role in plant cells.Jasmonic acid as a signal molecule extensively involves in the regulation to plant

Abstract:Arbuscular mycorrhizae are the most widespread mutualistic symbionts among the symbionts between plants and microbes.Fungi form mycorrhizae in plant roots and the hyphae take in carbon from plants through their epidermal cells and move mineral nutrients a

Abstract:Banana is an important crop in the world.Genetic engineering has created effective means for breeding improved banana varieties with advantageous traits.The paper summarizes the latest research advances in genetic engineering of banana having appearing in

Abstract:Known as the rapid non-destructive probe for studying plant photosynthesis,chlorophyll fluorescence analysis has been gradually put into use in studying the effects of stressful environments on plant photosynthesis and as it develops further on its uses w