Abstract:The Ultracytochemical localization of Ca2+-ATPase during the phloem ganglion development in Phyllostachys edulis(Carr.) H.De Lehaie was studied with cytochemical technology.In the initiating phase of the phloem ganglion,the plasma membrane and nuclei have

Abstract:Toxicodendron vernicifluum(Stokes) F.A.Barkley is characterized by the presence of laticiferous canals,which are the places to produce and store raw lacquer.The results of observation on both the reproductive and vegetative organs,indicated that laticifer

Abstract:A full length cDNA sequence was obtained by in silico cloning.After searching against potato EST database in GenBank using Alfin1 cDNA sequence from alfalfa.The native cDNA sequence denoted as Stfin1(Solanum tuberosum Alfin1-like protein1) was isolated wi

Abstract:Thirteen accessions from five cultivated Capsicum species were analyzed with RAPD and ISSR markers,and 28 phenotypic traits.Twenty-three RAPD primers and sixteen ISSR primers generated 209 and 94 fragments,respectively.The number of fragments per primer,t

Abstract:The genetic diversity of Chinese seabuckthorn and Russian seabuckthorn was analyzed by ISSR.96 loci were detected with 13 primers and 95 loci of them were polymorphic.On the genetic polymorphism of individuals in the populations,the female and male of Rus

Abstract:SSCP analysis of single strand PCR products of 16S rRNA gene V2 - V3 and V4 - V5 regions with 42 rhizobia isolated from 23 Medicago sativa varieties and 2 reference strains of S. meliloti and S. medica. The results suggested that there were 12 different a

Abstract:以98个家系组成的Nipponbare/Kasalath//Nipponbare回交重组自交系及其亲本为遗传材料,利用不同方式GA3处理幼苗以及复合区间作图法,研究了苗高和叶鞘长度对外源GA3处理的敏感性及控制GA3反应指数的数量性状位点(QTL).结果表明,GA3浸泡处理的幼苗第一叶鞘长度较对照显著增加,苗高和第二叶鞘长度增加效应不显著;GA3喷洒处理对第一叶鞘长度增加不显著,苗高和第二叶鞘长度显著增加.GA3浸泡处理条件下,检测到1个位于第1染色体的控制第一叶鞘长度反应指数的QTL(qIFL-1),解释性状变异的14%,对GA3敏感的等位基因来自Kasalath.GA3喷洒处理条件下,检测到2个分别位于第3、12染色体的控制第二叶鞘长度反应指数的QTL(qISL-3和qISL-12),分别解释5%和20.2%的性状变异,对GA3敏感的等位基因分别来自于Kasalath和Nippon-bare.qIFL-1与控制第一叶鞘长度本身的数量性状位点qFSL-1a位于同一染色体区段(C742~R2414);qISL-12位于控制第二叶鞘长度本身的qSSL-12a与qSSL-12b之间(C732~G193).

Abstract:Leaves and stem segments,which are from in vitro cultural plantlets of two chrysanthemum cultivars,were treated by PYM with 0,1,2,4 and 8 mg/L for 20 days.Then the explants were transfered to medium without PYM for calli induction and differetiation.The r

Abstract:The effect of STS(a broad spectrum protein kinase inhibitor) on the stomatal movement in Vicia faba was investigated with laser scanning confocal microscopy(LSCM).The results showed that(1) STS promoted stomatal opening significantly in dark,but did not i

Abstract:The diurnal variations of photosynthetic rate,invertase activities and sugar content in tomato leaves were measured from 6:00 to 18:00.The results showed:there were two net photosynthetic rate high points at 10:00 and 16:00,and starch and fructose content

Abstract:In this paper,the change of membrane fatty acid and enzymatic activity of nectarines at chilling injury temperature were studied.The results showed that the activities of SOD,CAT and APX decreased rapidly when chilling injury happened.The relative membran

Abstract:Eighteen wheat cultivars were used to study on diversity changes about wheat canopy temperature and analysis the relationships between canopy temperature and source-sink activity indexes(MDA contents,activity of SPS,net photosynthetic rate,chlorophyll con

Abstract:P38 and B167,endophytic bacteria strains which previously exhibited biocontrol ability,isolated from Hami melon plants.Colonizing dynamics of the strains in root,stem and leaf of Hami melon plant and their effects on the plants growth were investigated af

Abstract:以高、中、低纤维比强度棉花品种科棉1号、美棉33B、苏棉15号和德夏棉1号为材料,研究与棉纤维加厚发育密切相关的可溶性糖、蔗糖和-β1,3-葡聚糖含量动态变化特性及其对纤维比强度形成的影响.结果显示,与中、低强纤维品种相比,高强纤维品种棉花铃龄为10 d时纤维可溶性糖、蔗糖含量高,全铃期内其转化率高且转化彻底,铃龄为24~31 d期间蔗糖累积量高;纤维加厚发育起始期的-β1,3-葡聚糖含量峰值高,其中后期转化迅速而彻底.高强纤维品种棉纤维中可溶性糖、蔗糖和-β1,3-葡聚糖含量动态变化特性利于纤维素累积特性的优化,即快速累积期长、累积速率平缓,易形成高强纤维.研究表明,在物质变化水平上,可溶性糖、蔗糖和β-1,3-葡聚糖含量动态变化特性影响到棉纤维素累积特性,是导致棉纤维比强度品种差异的重要原因.

Abstract:以优质强筋小麦品种‘济麦20’为供试材料,研究了不同氮肥基追比（基肥：追肥为1：1、1：2、1：5）和灌浆中期高温胁迫对小麦籽粒产量和品质的影响.结果显示,灌浆中期高温胁迫处理能显著降低小麦千粒重、籽粒产量以及籽粒的淀粉含量、支链淀粉含量、支链淀粉/直链淀粉比例,峰值粘度、稀懈值、最终粘度也相应降低,而籽粒蛋白质含量相应提高,导致淀粉品质变劣而面团的流变学特性得以改善;在基追比例1：1的基础上增大拔节期氮素追施比例,能显著提高小麦常温和高温胁迫下籽粒产量,缓解高温胁迫对小麦千粒重和籽粒产量的不良影响,而对小麦籽粒面团流变学特性及面粉的粘度指标影响甚微.研究表明,适当提高拔节期氮肥追施比例可有效减缓灌浆中期高温胁迫对小麦产量的负面影响,但对小麦籽粒品质影响较小.

Abstract:以玉米幼苗为材料,在20%PEG模拟干旱条件下,研究了植物生长物质冠菌素0.001~1.0μmol?L-1处理时叶片水分状况及其脯氨酸、可溶性糖、MDA含量及抗氧化酶活性.实验表明,在干旱胁迫条件下,低浓度(0.01μmol?L-1)的冠菌素处理能显著降低干旱胁迫下叶片水势,并显著提高玉米幼苗叶片相对含水量、可溶性糖和游离脯氨酸的含量;同时能显著提高玉米叶片中POD、CAT和APX的活性(分别比对照高32.1%、13.8%和29.5%),而对SOD和GR的活性无显著影响;此时叶片中MDA的含量显著比对照降低11.6%,能够在一定程度上维持细胞膜的完整性.高浓度冠菌素处理(1.0μmol?L-1)下各指标的变化趋势则相反.结果证明,低浓度冠菌素(0.01μmol?L-1)能增强玉米幼苗耐干旱胁迫的能力.

Abstract:By measuring groundwater level of Shajilike and Aqihe sections in the middle reaches of Tarim river and analyzing physiological characteristic of soluble sugar and proline of Populus euphratica,Tamarix spp.and Phragmites communis,the relationships between

Abstract:Through pot cultivation,potherb mustard was used as a test material in order to study the photosynthetic characteristics of plants with heavy metal(Pb) in soil and by different fertilizations.The results showed that the different fertilizations significan

Abstract:Winter wheat variety 'Shaan 253' with strong gluten was chosen to study the effects of nitrogen,phosphorus and potassium fertilizer management on net photosynthesis rate of function leaf of main stem and its tillers at booting and filling stage.The result

Abstract:In order to investigate the physiological variation characteristics of the desert plant Reaumuria soongorica,the chlorophyll and proline content in leaves were measured in 407 individuals from 21 natural populations.At the same time,the soil physiochemica

Abstract:利用1982年至2003年NASAGIMMS逐月归一化植被指数（NDVI）数据集和玛曲县气温、降水资料,对玛曲县近22年来NDVI变化和气候变化特征及其相互关系进行分析,以揭示黄河上游地区植被对全球变暖的区域响应.结果表明：（1）玛曲县植被变化在不同时段表现出较大差异,NDVI年际变化略有增加.（2）夏季是NDVI增长最快的季节,春季NDVI在20世纪90年代后期到本世纪初呈下降趋势,秋、冬季NDVI呈下降趋势.（3）返青期和NDVI值在春季达到同一水平值的时间及夏季达到峰值的时间逐年提前,说明生长季提前是该地区植被对全球变暖的主要响应表现.（4）玛曲县近22年来植被的NDVI变化在中等盖度水平（0.3～0.5）呈增加趋势,高盖度水平（≥0.7）的植被呈下降趋势,而在年代间变化水平上,气温和降水对植被生长都有影响,其中气温要比降水更显著;玛曲县降水和气温在季节尺度上对NDVI的影响不明显,除夏季气温与夏季NDVI关系密切之外,其他季节的关系均不明显.（5）按植被变化特点,将NDVI变化斜率最大值0.005定义为返青期指标,发现该地区牧草返青期的变化主要受温度条件影响,随气候变暖,返青期提前,其变化规律为4～5月份平均气温每10年升高0.6℃,返青期每10年提前3 d.

Abstract:Shrub is a dominant vegetation type in south slope of Tianshan Mountains,Luntai County.Meanwhile,it is also a relatively stable ecosystem type and plays vital ro1e for water and soil conservation in this region.The results were as follows:(1) The plant sp

Abstract:The main tree speices of Pinus tableformis forest in Ziwuling Mountains were inventoried.13 tree species were selected based on the important value.And the data was analyzed by spatial distribution index and x2 and interspecific association index.The resu

Abstract:The plant community characteristics were measured with quadrat samples in Hulunbeier meadow steppe.The vegetation and soil data were used to divide the quantitative stage of degradation with systematic cluster analysis.The results showed as follows:(1) Th

Abstract:Fern flora in Tongtieling,Hainan Island composes of 117 species of 71 genera in 40 families.The species-rich families are Polypodiaceae,Thelypteridaceae,Aspleniaceae,Aspidiaceae,Lindsaeaceae,Hymenophyllaceae and Pteridaceae,all of which contain over 6 spe

Abstract:Based on the field collection, specimen examination and textual research of literature, we studied the taxonomy of Astragalus with medifixed hairs in Boundary Mountainous Area with Kazakhstan,west Junggar Basin,Xinjiang,China. The result showed that 26 sp

Abstract:Chusua nana(King & Pantling) Pradham f.alba Z.H.Wu & Q.H.Yang,a new form of Chusua(Orchidaceae) from Shaanxi,China,is described and photographed.It differs from f.nana by having white flowers as well as green bracts and rachis.

Abstract:This is the fourth paper that deals with addenda on seed plants of Flora Tsinlingensis.Myriophyllum spicatum Linn.of Haloragidaceae was included in the present paper.The family is a new record of Mt.Qinling.

Abstract:Six species and one variety of Pteridophyte in Shanxi Province belonging to seven genera in six families are firstly reported.They are Pteris multifida Poir.,Woodwardia orientalis Sw.,Asplenium interjectum Christ,Macrothelypteris oligophlebia(Bak.) Ching

Abstract:从木瓜[Chaenomeles speciosa（Sweet）Nakai]果实的乙酸乙酯提取物中分离并鉴定了4个化合物,利用现代波谱技术（MS、^1H NMR、^13C NMR）进行结构鉴定,它们分别为对苯二酚（1）、3,4-二羟基苯甲酸（2）、槲皮素（3）和3-羟基丁二酸甲酯（4）.2,2-二苯基-1-苦肼基（DPPH）自由基清除试验表明化合物（1～3）显示抗氧化活性.化合物1～4均为首次从该植物中获得.

Abstract:The aim of this study was to establish a suitable medium for the conservation of pineapple germplasm 'Bali' at norma1 temperature in vitro.The pineapple plantlets were conserved on five different media with different concentrations of the mineral nutritio

Abstract:以京丰1号甘蓝品种为试验材料,通过田间小区试验研究了不同氮肥用量对甘蓝产量、品质以及土壤NO3--N含量的影响.结果表明,(1)随着施氮量的增加,甘蓝产量呈先升高后降低趋势,并于施氮量为185.14 kg/hm2时产量最高(25.86 kg/8.4 m2).(2)随着施氮量的增加,甘蓝的NO3--N含量明显增加,而Vc和可溶性糖含量则逐渐下降,并且残留在土壤中的NO3--N含量持续增加.因此,为达到优质高产并同时保持土壤的可持续利用和提高氮肥利用率,在生产实践中甘蓝适宜氮肥施用量为185.14 kg/hm2.

Abstract:内切-1,4-β-葡聚糖酶(EGases)可以催化水解具有1,4-β-葡聚糖主链的多聚糖,如纤维素和木葡聚糖分子,从而参与对细胞壁的修饰.植物细胞中存在一个EGase蛋白家族,且多为分泌蛋白;在植物细胞中还存在另一类跨膜EGase,是细胞壁纤维素生物合成所必需的,但植物EGases在体外具有降解纤维素人造底物羧甲基纤维素(CMC)的能力,而绝大多数植物EGases在活体细胞中并不能有效地降解结晶态纤维素分子和木葡聚糖分子.本文就EGases在细胞伸长、果实成熟和组织器官脱落等发育过程中的作用,以及EGases在植物纤维素合成与降解中的作用进行综述.

Abstract:Resveratrol is a phytoalexin produced by some plant species in response to biotic and abiotic stresses.It quickly metabolize into pterostilbene,piceid,viniferins etc in vivo.These metabolins also have a wide-array of biological activities like resveratrol