Abstract:Low temperature wheat germplasm with constantly low plant temperature as well as corresponding high-temperature wheat germplasm with constantly high plant temperature had been discovered to exist in the world of nature through the long time observation of

Abstract:Semi-thin sectioning and the method commonly referred in histochemistry were used to study the development of vascular bundles in Aloe arborescens leaves with emphasis on the origins and tissue types of vascular bundle sheath cells and aloin-containing ce

Abstract:The Ultra-structural characteristics of the vacuoles in the infected ceils of Onobrychis viciifolia root nodules were studied by transmission electron microscopy. The results showed that the vacuoles of the infected cells contained a small amount of fiber

Abstract:Virus-introduced gene silencing is a technique that exploits the RNA-mediated antiviral mechanism. The modified virus vector carrying the fragment of a target gene were constructed and then inserted to silence the target gene within host plants by Agrobac

Abstract:The China spring-Egyptian Red substitution lines were used to position the genes of controlling water use efficiency, photosynthetic rate, transpiration rate, POD activity and SOD activity on wheat chromosomes the results revealed that the genes of contro

Abstract:19 pairs were chosen from 64 pairs of AFLP analysis primers. And 8 pairs of the 19 pairs suitable for fluorescent testing were screened through polyacrylamide gel electrophoresis and siliver-staining AFLP analysis. Of the 8 pairs, 4 pairs that had abundan

Abstract:Orthogonal design and variance analysis were used to study the optimization of the factors for the regeneration protocol of Rosa canina cv. 'Edelcaninas' and the results showed that the major factors affecting the regeneration of Rosa canina plants were N

Abstract:Micro-satellite markers are the second-generation molecular markers, which have been developed in recent years and are characterized by such favorable characteristics as even distribution, high polymorphism, co-dominance and selective neutrality, and used

Abstract:The seedling leaves and the kernels at milky stage and four Nian-type isonuclear and alloplasmic male sterile lines and their corresponding maintainers and restorers of Nian-type non-1BL/1RS wheat, were investigated, and the anthers of the male sterile li

Abstract:Eleven varieties (lines) of winter wheat, which perform well and present one advantageous agronomic trait, were chosen and divided into four groups, big-kernel type, multi-spike type,heavy-spike type and medium type in terms of their agronomic traits. The

Abstract:Potassium pyroantimonate precipitation method was adopted to the Ca~(2+) distributions in the developing connectives of different sterile lines and the corresponding maintainer lines as well as their fertile anthers of rice. The results showed that the Ca

Abstract:The PPO, PAL and POD activities and the isoenzymes in the leaves of the Brassica oleracea Seedlings infested by peach aphid (Myzus persicae Sulzer) were studied. The results denoted that with the aphid infestation going on, the PPO, PAL and POD activities

Abstract:Three cucumber cultivars with different cold tolerances were used to study the changes of SOD, CAT and POD activities in Cucumber leaves during cold damage. The results showed that under the stress of low temperature, the cultivars presented the CAT and P

Abstract:A field experiment was carried out to study the effects of five planting modes on protein turnover of wheat at the kernel-filling stage. The five planting modes were the common planting mode without mulching, the planting mode characterized by straw mulch

Abstract:An indoor pot experiment was conducted with Zhengyin 1 (the wheat type with high fertilizer and water requirements) and Shanhe 6 (drought-resistant wheat type), two wheat varieties, to study the contents of chlorophyll (chl a and chl b) and MDA in the lea

Abstract:Sand culture was conducted to study the response of Aloe vera seedlings to seawater. The results revealed that:(1) The Aloe vera seedlings in the treatment with seawater covering 30% did not significantly differed from the ones in the control in dry weigh

Abstract:Puccinellia tenuiflora seedlings were treated with Na2CO3 at different concentrations and the relative conductivity, osmotic potential, photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate and water use efficiency

Abstract:With drought-tolerant Robinia pseudoacacia L., Acer truncatum Bge., Hippophae rhamnoides L., Ulmus pumila L., Pinus tabulaeformis Carr., and Pinus bungeana Zucc.ex Endl. and mesophilous Ligustrum lucidum Ait. and Salix matsudana Koidz. f. pendula Schneid.

Abstract:以自然状况下生长良好的耐旱树种刺槐（Robinia pseudoacacia L.）、元宝枫（Acer truncatum Bge）、沙棘（Hippophae rhamnoides L.）、白榆（Ulmus pumila L.）、油松（Pinus tabulaeformis Carr.）、白皮松（Pinus bungeana Zucc.ex Endl.）及中生树种女贞（Ligustrum lucidum Ait.）、柳树（Salix matsudana Koidz.f.pendula Schneid.）为研究对象，用压力室法测定木质部水势，用冲洗法测定木质部栓塞程度，研究不同生长季节木质部栓塞与水势间的火系。结果表明：针叶树油松、白皮松在各个季节水势均较高，水势变化幅度较小，木质部不易发生栓塞，这与其木质部由管胞构成，对木质部栓塞不敏感，在干旱时采用高水势延迟脱水的耐旱策略有关。阔叶树刺槐、元宝枫、沙棘、白榆、女贞和柳树的木质部栓塞现象是其在每天正常生长过程中不可避免的“平常事件”，是它们适应干旱的一种方式。它们的木质部栓塞程度与水势表现出了相反的变化趋势，即同一树种在同一季节内水势值越低，木质部栓塞程度越大，但在不同树种及同一树种的不同季节不存在这种关系。由此可见，植物木质部栓塞对水势的敏感程度（即木质部栓塞脆弱性）主要由树种的木质部结构决定，同时受到树种特性、树木生长发育时期、外界环境因子的影响，木质部栓塞的脆弱性也具有季节变化特征。

Abstract:运用开放式气体交换LI-6400便携式光合作用测定系统,研究了葡萄(VitisviniferaL.cv.Yatomirosa)在不同土壤水分条件下净光合速率(Pn)、蒸腾速率(E)、气孔导度(Gs)及水分利用效率(WUE)特征.结果表明,葡萄在湿润和干旱条件下净光合速率(Pn)日变化均呈不明显的双峰曲线,有轻度的中午光合下调现象;湿润条件下葡萄Pn高于干旱条件下,日平均分别为(9.16±0.10)μmol.m-2.-s1和(7.34±0.08)μmol.m-2.-s1,提高了24.8%;E也是湿润条件下高于干旱条件下,日平均分别为(2.59±0.03)mmol.m-2.-s1和(1.07±0.02)mmol.m-2.s-1,提高了142.1%;WUE则不同,日平均湿润条件下低于干旱条件下,分别为(4.28±0.16)mmolCO2.mo-l1H2O和(7.08±0.20)mmolCO2.mo-l1H2O,降低了39.6%.在土壤水分条件好时葡萄Pn升高,但蒸腾速率也明显增大;在土壤水分条件差时,虽然光合速率有所减小,但蒸腾速率大幅度减小,水分利用效率显著提高.这表明,高的土壤水分显著增大了葡萄蒸腾强度,适度干旱则有利于提高葡萄水分利用效率.

Abstract:Different genotypes of corn hybrids with their parents were hydroponically cultured to study the effects of water stress on the hydraulic conductivity of their root systems and the hydraulic-conductivity difference of the root systems were analyzed from p

Abstract:With Gaoyou 115, a corn variety with its leaves highly levelly extending, Nongda 108, a variety with its leaves moderately levelly extending, and Zhengdan 958, a variety with its leaves least levelly extending, as the materials, the light-response curves

Abstract:The study was conducted to investigate and collect the rhizobia in Pamirs Plateau of China:the symbiotic resources with leguminous plants, and analyze the characteristics of their nodules and their resistances to adversities. It totally collected 22 legum

Abstract:A method of fractal geometry was adopted to analytically study the relations between aboveground biomass and plant height of Aneurolepidium dasystachys populations. The results revealed that there existed a obvious fractal relation between aboveground bio

Abstract:The spatial and temporal trends of the community numbers of five dominant species in Minqin Liangucheng Nature Reserve were studied in terms of their importance values, distribution patterns, age structures, and static life curves. The results indicated t

Abstract:The mountainous region of west Xingtai Prefecture is the area covered by the southern part of the Taihang Mountains, and taken over by plenty of plants, which total 823 species, 393 genera and 93 families that belong to seed plants, Of the dominant famili

Abstract:The stems and leaves of Rhodiola kirilowii were used to induce their calluses which were then subcultured at 24 C and 4 C, respectively. And then the activities of phenylalanine ammonia lyse and cinnamate 4-dedroxylase and tyrosine ammonia-lyse in the cal

Abstract:Matrine was extracted from Sophora flavescens Ait. with acidic ethanol or aether, and isolated by silica gel column chromatograph. The toxicity of matrine was tested on Mus musculus. Mus musculus death mainly occurred within 48 hours after testing and no

Abstract:The genus Hippeophyllum Schltr.(Orchidaceae) and the species H. sinicum S. C. Chen et K. Y. Lang are reported as new records of Shaanxi Province.

Abstract:Five species of Scleria (Cyperaceae) are reported as new distribution records to 4 provinces of China. S. radula is a new record from Fujian, S. tonkinensis from Guangxi, S. parvula and S. terrestris from Jiangxi, and S. lithosperma from Yunnan.

Abstract:Raw fat, soluble protein, coarse fibre, soluble sugar,and vitamin C in different parts of Exochorda giraldii such as young stems,leaves, and flowers were determined. The results showed that Exochorda giraldii was rich in crude fat its content of which amo

Abstract:The antibiotic activities of the active component of Stellera chamaejasme L. against E. coli, S. aureas, Candida albicans, T. purpureatum, T. gypsum, M. gypsum and E. floccosum, pathogenic bacteria and fungi, were preliminarily tested by Neo-Sensitab disk

Abstract:Polyacrylamide gel electro phoresis (PAGE) was adopted to study peroxidase isozymes in three Gastrodia elata variants. The results showed that the three variants presented different peroxidase isozyme activities, and had 5-7 isozyme bands including their

Abstract:用超临界萃取技术对产于青藏高原上的糖茶蔗种子中脂肪酸进行萃取，其萃取率为12％。用毛细管气相色谱对萃取的脂肪酸进行了分离和分析。结果表明不饱和脂肪酸的质量分数在90％以上。其中α-亚麻酸（α-linolenic acid）为27.4％，У-亚麻酸（У-linolenic acia）为2．70％。亚油酸（1inoleic acid）40．0%，油酸（oleic acid）21．0％。

Abstract:Six genotypes of wheat were used to study SOD activities and superoxide radical (O~()_2) contents at different stages of wheat growth and analyze the relations between the two. The results showed that the SOD activities and superoxide radical contents of

Abstract:The paper analyzes the characteristics of Dalbergia hupeana florae, which indicates that the florae have highly-diversified family-genus and genus-species compositions and belong to typical secondary communities; the florae present remarkable intermixed c

Abstract:Charophytes have 13 areal types in China. Of them,the areal types only found in China are absolutely dominant and the others cover a small percentage, which indicates the charophytes in China are weakly associated with the ones in other regions. Nitella h

Abstract:Chlorophyll is the important pigment participating in photosynthesis in plant chloroplasts. Chlorophyll-deficit mutation is an obvious trait mutation, which plays an important role in both theoretical research and practical uses. The paper deals with the

Abstract:Zingiberaceae plants are highly diverse in species, morphology and anatomic structure as well asin pollination. Thus it is of high importance in phylogenetical and evolution researches of ginger order, even monocotyledons, to study Zingiberaceae plants. T

Abstract:The paper summarizes the research advances of Cuminum cyminum related to chemical composition, medical treatments, foods and agriculture with emphasis on its insecticidal 1 and anti-bacterial orfungal effects so as to provide the basis for its pesticide r

Abstract:11 S glycinin is part of storage protein in soybean seeds and six kinds of functional glycinin that have been discovered so far are G1, G2, G3, G4, G5 and G7; the gene families encoding these kinds of functional glycinin are Gy1, Gy2, Gy3, Gy4, Gy5, and G