Abstract:Influence of carbon sources,maltose,sucrose,and lactose,and nitrogen sources,KNO 3,(NH 4) 2SO 4,and glutamine on microtuber formation of Hutao,Kesi and Favorita as well as kinetic change of sucrose concentration and conductivity in liquid medium were

Abstract:南方红豆杉茎段愈伤组织在不同基本培养基及激素组合的培养基上，其平均鲜重生物量具显著差异，而干重生物量无差异。适宜浓度的ＮＡＡ可以取代常用的、但致癌活的２，４－Ｄ。

Abstract:用共同的保持系陕３Ｂ将０７Ａ、２２Ａ、ＮｉｋＡ、陕２Ａ、ＰｏｌＡ５种不同的ＣＭＳ转育成同核异质不育系，研究不育胞质与可育胞质的差异和５种不育胞质之间的差异。

Abstract:Content of nuclear DNA for apple cultivars including 12 diploid and 5 triploid was measured by flow cytometry.The average nuclear DNA content of diploid cultivars was 2.27 pg and that of triploid cultivars was 3.13 pg,which indicated that variation of nuc

Abstract:Under 150 mmol/L NaCl stress,higher K and lower Na ion contents in shoots of 4E(4D) substitution line,of which 4D chromosome is substituted by 4E chromosome from Agropyron elongatum (2n=70),are kept than those in common wheat.Thus 4E chromosome carrie

Abstract:根据数量遗传学原理和杂交育种实践，并以１６个小麦单交组合为材料，探讨了Ｆ２代组合和单株选择的相对重要性以及Ｆ１组合评选的可行性和适宜参数。

Abstract:Gene effects and heterosis of lodging resistance traits in wheat were studied syculmatically by Hayman diallel analysis methods.The results indicated that additive and dominance effects were significant for all the traits and dominance effects were more i

Abstract:通过人为改变小麦旗叶与茎秆的夹角，比较了晴天田间小麦直立叶（１０°）与平展叶（９０°）光合作用光抑制程度的差别。在叶温高达３７．６℃、最高光强为１６００μｍｏｌ．ｍ＾－２．ｓ＾－１的晴天，田间小麦经午间强光照射４ｈ后，ＰＳⅡ光化学效率明显下降。

Abstract:With -0.9 MPa D Mannitol treatment,the elongation growth (LER) and H + extrusion of mung bean seedling hypocotyl was significantly inhibited,and the inhibition was even more serious with treatment time.The PMH + ATPase activity under osmotic stress de

Abstract:Effects of different concentration of selenium on the activity of GSH Px and the contents of GSH and MDA in germinating seeds and seedlings of rice,wheat,towel gourd,cucumber and Chinese cabbage were studied in order to find the relation of selenium and

Abstract:Both the free proline contents of anther and the pollen germination rate were compared between the virosis plants infected with TMV and non virosis plant in hot pepper ( Capsicum frutescens L.).The results indicate that the virosis plants and non vir

Abstract:Changes in MDA and soluble protein content and activity of superoxide dismutase (SOD),catalase (CAT),and peroxidase (POD) in flowers of two varieties of Tulipa gesneriana L.during flower senescence were investigated.The results showed that activity of

Abstract:Two examples of bilacunar nodes and 21 examples of bilobed leaves from 500 individuals and 3500 leaves of Circaeaster was reported in this paper.The bilacunar nodes we found are similar to the cotyledonary nodes of Circaeaster .The different node s

Abstract:莲胚子叶细胞中质体的产生从受精后的４ｄ左右一直延续到２１ｄ左右，质体的分裂是质体数目增加的一种方式。子叶细胞在发育阶段１，即分生组织细胞中前质体大量出现，体积小，多为变形虫状，大量的位于细胞的外围。

Abstract:The development of the pericarp of Juglans regia Linn.may be divided into three stages.At the early stage,no boundary line in exocarp,mesocarp and endocarp,the development of vascular bundles is in primary stage.At the middle stage,the boundary line b

Abstract:在严格控水的防雨棚内，比较 抗旱筛选和省区试后表现抗旱高产的玉米新品种鲁玉１４号和对照掖单２号的殂态解剖结构，结果表明：玉米抗旱与不抗旱的差异并非品种的结构决定，而在抗旱性结构指标上存在差异。抗旱品种的叶片厚，气孔指数及气孔数／ｍｍ＾２大，侧根发生早、发生能力强可作为玉米抗旱育种与栽培的形态结构指标。

Abstract:Comparative studies on the anatomical structure of the leaves of 14 maritime halophytes ( Lathyrus maritimus,Calystegia soldanella,Glehnia littoralis,Asparagus dauricus,Dianthus chinensis,Silene aprila,Scutellaria strigillosa,Cynanchum thesioides,Limoniu

Abstract:With the method of dry ditching,the paper studied the affection of deep ditch manuring measure to the weight,composition and distribution scope of apple root system.It is proved that the total root weight,volume and length of the deep ditch manured tree

Abstract:Lodicule consisted of epidermis,ground tissue cells and some veinal vascular bundles.There was a cuticular layer,but no stoma on the epidermis.The number of the closed collateral vascular bundles and their vessels of the hexagonus barley is more than that

Abstract:The morphological characteristics of pollen of 9 species in genus of Arenaria in Xinjiang were studied by LM and SEM.Pollen shape is spherical,aperture is polybrochate,it have warts in aperture membrane,the exine sculpture is characteried by finely gr

Abstract:The method of contiguous grid quadrates was adopted to collect field data.The quadrate variance analysis,Greig Smith and Kershaw methods were used to study the spatial distribution pattern,pattern scale and pattern intensity of Pinus armandi populati

Abstract:The vertical difference of vegetation is one of the important law of vegetation ecology.On the basis of the vertical difference of shrub wood vegetation in flora,growth form,origin,dominant synusia,dynamics and human impacts,three vertical zones of shrub

Abstract:以驯化移栽的满天星试管苗为扦插母本，研究了生长素的种类，浓度处理方式，处理时间及扦插基质、扦插环境等对满天星扦插生根的影响。

Abstract:Restriction fragments length polymorphism analysis (RFLP),and random amplified polymorphic DNA (RAPD),and allozyme analysis are three representatives of the various techniques used in the estimation of genetic diversity at molecular level.Genetic variatio

Abstract:研究了菠萝叶片中苹果酸、柠檬酸、草酰乙酸、α－酮戊二酸和草酸等有机酸和转氨酶、脱氢酶活性的昼夜变化。结果表明，除了草酸外，其他４种有机酸的含量都呈白天降低晚上增高的趋势。有机酸的含量在上午９∶００时有最高值，下午１８∶００时有最低值。苹果酸、柠檬酸、草酰乙酸、α－酮戊二酸和草酸的昼夜最大差值分别为１４０、６１、３１．８、８．２和６．７ｍｍｏｌ·ｋｇ－１ＦＷ。异柠檬酸脱氢酶和琥珀酸脱氢酶活性的昼夜变化与有机酸的趋势一致，白天降低晚上增高。可溶性蛋白和游离氨基酸含量以及谷草转氨酸、谷丙转氨酶活性在下午１８∶００时有最高值，凝胶电泳显示菠萝叶片中有新的蛋白带出现。

Abstract:Responses of wheat to salt stress and mitigative effects of salicylic acid,aspirin on salt stress induced injuries were studied during the stage of seedling growth of wheat ( Triticum aestivum L.).The results showed that,salicylic acid and aspirin can

Abstract:Wheat cultivars of different grain weight (representing small of large grain cultivars respectively) were selected as experimental materials,the effect of removal of top two spikelets on 1000 grain weight,grain number per ear,grain weight per ear,average

Abstract:The cotyledon explants of 7 Brassica napus and 2 B.campestris varieties (lines) were cultured and some of factors affecting shoot regeneration at high frequency were also studies.Results showed that the frequencies of shoot regeneration of cotyled