Abstract:saponin of thea sasanqua scientific name thea saponin, structural sugar is composed of glucuronic acid, arabinose, xylose and galactose, structural acid is composed of tran, cis-1, 2-dimetnylacrylic acid and acetic acid. Thea saponin is to make up similar

Abstract:采用气相色谱─质谱联用的方法，分析测定了黄蔷薇花精油的化学成分，从中分离到４５种成分，鉴定出４０种，其含量占精油总量的９２．７４％，主要的香气成分是１，８─桉油醇（１９．９４％），苎烯（１３．４０％），△─３─蒈烯（５．１０％），月桂烯（３．６０％），α─萜品醇（２．４９％），莰烯（２．１６％），芳樟醇（１．１５％），β－罗勒烯─ｙ（０．８６％），丁香酚（０．８２％）和香叶醇。

Abstract:UMH Polysaccharide has been obtained fron Umbilicaria hypococcinea Llano. By sephadex G-150 column chromatography, UMH was shown to be single substance. By G. C.analysis was composed of glucose mannose and glucuronic acid, molecule ratio was about 45:1:9.

Abstract:There are 51 species of the Gasteromycetes, in Shaanxi Province, including 2 doubtful species and 13 new records of Shaanxi Province, belonging to 19 Genus, 9 Families and 6 Orders.

Abstract:Ultrastructure of secretory cavity in the fruit of Zanthoxylum bunge anum from electronic microscopy studies shows the most notable feature of secretory cavity cells is a large number of plastids filled electron-dense osmiophilic material, without lamella

Abstract:It was revealed that the crystal cells distributed in each organ within Sainfoin (Onobrychic viciaefolia scop.). The typies of crystal inclued prismatic crystal and sand crystal.In the vegetative organs, prismatic crystals mainly distributed in vascular t

Abstract:Anomalous thickening occurs in the stem of Amaranthus craudatus as a result of successive activity of anomalous cambium originated from procambium, which gives rise to many rings of scattered anomalous bundles. Anomalous cambium composed of one to two cel

Abstract:草莓、漆树、芥菜和薄荷四种植物花蜜腺形态结构各异。草莓花蜜腺着生在花管内壁上属花被蜜腺。芥菜花蜜腺４枚，包括一对侧蜜腺和一对中蜜腺。漆树和薄荷的花蜜腺为花盘蜜腺，位于子房基部。四种花蜜腺都属结构蜜腺，其中仅芥菜的侧蜜腺组织中具维管束。它们在发育早期均无特殊的原始细胞，都由花器官表层细胞反分化形成原基，再发育成蜜腺。四种花蜜腺发育过程中细胞原生质体的液泡都表现出了规律性的消长变化。漆树和薄荷的花蜜腺具典型的淀粉动态变化，草莓的花蜜腺则属非淀粉型蜜腺；芥菜花蜜腺介于这两种类型之间。草莓和薄荷的花蜜由表皮细胞直接渗出。芥菜则气孔和表皮泌出兼备而漆树通过气孔泌蜜。

Abstract:The development of the anther wall follows dicotyledonous type.The cytokinesis at the time of pollen mother cells meiosis conforms to successive type. The arrangement of the microspores in the tetrad is referred to tetrahedral mainly and a few of them is

Abstract:This studies were conducted with morphology on pollens in 30 of the honey plants commonly distributed in Shaanxi,by means of scanning electron microscope. In this paper, the pollen sizes, the patterns of germination apertures, and the exine onaments were

Abstract:通过矮牡丹的树干解析，得出了以下结论：矮牡丹的地径的增长速度、株高的增长速度在植株生长３─９年时最快，以后逐渐变慢；株高生长的成熟龄为６─１２年，在植株生长９年以后，几个标本的生长速度都明显降低；在材积的增长过程中，１６年株龄的标本仍然没有达到成熟龄，连年生长曲线和平均生长曲线没有交点，表明矮牡丹的生长仍然处于旺盛阶段；立地条件对植株的生长也有着较大的影响，在立地条件较好的区域，植株明显生长比较快，而在立地条件较差的区域生长也差。

Abstract:Under water stress root dry weight of winter wheat grown in the pots is positively linearly related to its root length density significantly. In view of root length density reflecting the most active part of root system in soil, the relationship between r

Abstract:通过对抗旱性不同的高粱品种在不同水分胁迫条件下种子萌动、萌发及吸水过程的研究表明：高粱种子在萌动、萌发两个生理过程中对环境水分条件的敏感性不同，种子在萌动时比萌发时更适应低水环境。不同的高粱品种在萌动、萌发时所忍耐的临界环境水势也存在明显差异。种子胚和胚乳两部分的吸水过程具有不同的特点。胚部的干重含水量在吸水后一直急剧增加，直到萌动时达到最大，而胚乳的含水量除在前期快速增加外，随后缓慢增加，保持在相对稳定的水平。在种子吸水萌动过程中，种子胚与胚乳间，以及它们与环境间始终存在着水势梯度。

Abstract:By comparison research of PFP carboxylase in the facultative and obligate CAM plants, it is showed that there is new PEPC isozyme appearence from M. cordifolium and S. spectabile by drought induction. But it does not appearence from S. aizoon. It is not o

Abstract:采用小偃６号小麦品种，在模拟田间原状土容重的条件下土培，研究了土壤水分和磷营养对小麦根系生长生理特性的效应。结果表明：在土壤相对含水量为４０％─７０％范围内，土壤水分亏缺，小麦根系生长受到限制，根系比表面积（ＲＡ）、根呼吸速率（Ｒｐ）、根水势（Ｒψｗ）和叶片蒸腾强度（ＥＩ）明显降低，根系干物重（ＲＤＷ）减少；轻度干旱有利于根系的延伸生长；在土壤干旱条件下，磷营养可以提高根系ＲＡ，降低根系Ｒｐ，提高Ｒψｗ、增加叶面ＥＩ，促进根系延伸生长，扩大小麦根系对土壤深层水分的吸收和利用，进而促进地下部生长，提高ＲＤＷ。磷除作为一种营养物质促进作物根系生长发育外，在水分胁迫条件下，磷营养可明显改善植株体内的水分关系，增强对干旱缺水环境的适应能力，提高作物抗旱性。促进根系生长，提高水分利用的有效方法是根据土壤水分状况调节磷的用量。

Abstract:The changes of growth and development, water metabolism, and yield componment were studied under mid water deficit(40% soil Capillary Water, CW) condition, and only different level water supplement, 30% CW-100%CW, at jointing stage of spring wheat. The re

Abstract:Dynamics of DNA/RNA were studied during developing of pea seeds. The results showed that the fresh weight, RNA, DNA content per seed were increasing during developing of pea seeds. The RNA content per seed reached the maximum at 21 days after flowering, a

Abstract:During the grain development of Setaria italicd Beaur the increase of proteolytic activity in flag leaves and content of free amino acid in flag leaves or grain followed a bimodal with the first peak (maximum) at 13th day post flowering and the last at 25

Abstract:通过对猕猴桃果实成熟主要指标的测定，确定了秦美适宜采收期为１０月３日至１２日，西选１号和海沃德为１０月下旬。这时果实可溶性固形物含量为６．５─９％，硬度１２─１６ｋｇ／ｃｍ２。猕猴桃贮鲜技术在１９９２／９３年度中试（示范）成功的基础上，１９９３／９４年度在６４ｔ果实上的应用又取得了好结果。秦美贮藏１５７天，果实新鲜，完好果和商品果分别为９６．６％和９７．４％。果实在贮藏期间硬度逐渐降低，由采收时１２─１６ｋｇ／ｃｍ２下降到１．６ｋｇ／ｍ２；淀粉在酶的作用下不断转化为可溶性糖，可溶性固形物由采收时６．５─９％增加到１３．７％。简易降温库成本低，可利用自然低温设施，果实在箱袋内加保鲜剂后置该库内有利于延长猕猴桃贮藏保鲜期。

Abstract:In this paper,we made a comparision of biochemical and morphal anatomy among three breeds of Malus pumila Mill. stored in natural condition, by analysing biochemical composition, LM and SEM. The results is the content of pectin. sugar and protein in Red F

Abstract:采用由我们研制的植物低温保护剂对番茄幼苗抗寒力的影响。用植物低温保护剂处理番茄幼苗，超氧物歧化酶（ＳＯＤ）、过氧化物酶（ＰＯＤ）、过氧比氢酶（ＣＡＴ）活性升高，丙二醛（ＭＤＡ）含量及电导率降低。脯氨酸、可溶性总糖和叶绿素含量增加；根和叶的ＴＴＣ还原率同步增大，电导率同步降低；抗寒力鉴定结果表明：番茄幼苗可抵抗－２℃─－５℃［－２℃（５ｈ）─－３℃（３ｈ）－─４℃（３ｈ）─－５℃（１ｈ）］长达１２小时的低温，田间结果表明，番茄幼苗可抵抗－２℃─４℃低温长达一周。

Abstract:in this paper, the plants of the family Sargentodoxaceae was comparatively studied in aspects of flower and leaf morphology, leaf anatomy, pollen morphology, karyotype and isozymies. The results showed that: 1)The flowers of the family were unisexual beca

Abstract:马蹄香是我国特有的单种属植物，也是一个受威胁的物种，被列为国家级重点保护植物。作者调查了马蹄香在陕西秦巴山区的分布、生境及其现状，论述了它的保护价值，重点分析了致濒原因，提出了以就地保护与迁地保护相结合，以就地保护为主，积极进行分株繁殖，以实现在其原产地恢复和发展种群为最终目的的保护措施。

Abstract:There are 15 genera with 68 species, 2 subspecies, 5 varieties and 1 form of Caryophyllaceae in Loess Plateau from Chima. In this paper, their correct names,synonyms, distributions, habitats and uses are reported.

Abstract:in this paper, 30 species, 1 subspecies 2 varieties and of Astragalus Linn. from Qinling Mountains are reported, among them, 9 species, 1 varieties are new record in Qinling region.

Abstract:Moist stratification, seeding time, manage methods, transplantation time and blossom time of Yulan Magnolia have been studied in this paper. The results show that the longer they conduct moist stratification, the earlier and more concentrated they lift, t

Abstract:Iris is a kind of perennial herbaceus flowers and plants belong to Iridaceae. They had been introduced by us since 1962. The results of domestication experimentation have indicated that most of Iris cultivated in natural condition in Xi'an can pass their

Abstract:采用气相色谱，液相色谱，氨基酸高速自动分析仪，以及化学分析的方法，对中国特有植物金钱槭（ＤｉｐｔｅｒｏｎｉａｓｉｎｅｎｓｉＯｌｉｖ．）种子的化学成分进行了研究。首次报道金钱槭种子含油率２９．１４％。油的理化常数：折光率１．４７３２（２０℃），皂化值１７８；７０，酸值６．９０。油的脂肪酸组成（％）：油酸３６．７，亚油酸２４．２，芥酸１７．８，花生油酸７．２．亚麻酸２．８，棕榈酸６．７，花生酸３．０，硬脂酸１．５，以及微量的棕榈油酸、十六碳二烯酸，山酸和１种未鉴定酸。种子含蛋白质２９．１６％，含游离氨基酸０．４２５％，含水解氨基酸２２；８４４％，含１８种氨基酸成分。含可溶性糖１０．８６％，其糖分组成：蔗糖２．７３９％，葡萄糖０．９０９％，果糖０．６９８，及微量木糖与１种未鉴定糖。含纤维素２．２５％，含灰分５．３７％，含干物质９２．１０％。