Abstract:Under the saline environment,in the cells of saline plants such as Halocnemum strobilaceum,Kalidium foriatum and Salicornia europaea,MDA,the product of lipid over-oxidation,increas-es,and SOD increases correspondingly.The SOD content is always 1.2 time hi

Abstract:The development processes ofembryo and endosperm in spring wheat of twins seedling wereobserved by using paraffin section method and intact dissection.Many abnormalities were ap-peared.The results were as follows:1.twins embryo,the frequency is about 6 pe

Abstract:In the Process of Calenaula Officinalis Linn.seed germination,all those seedlings will be-come strong ones that hypocotyls are long and grow fast.Most portion of hypocotyl has the char-acteristic of the primary structures of its root and stem.Transition z

Abstract:Secondary xylen structure of Ephedra przewalskii Stapf and E.intermedia Schrenk ex Meywas investigated by means of light and scanning electron microscopy.The axial system is chieflycomposed of tracheids and vessel elements.The horizontal system comprises

Abstract:本文用八倍体小黑麦与普通小麦进行正反交。用ＧｉｅｍｓａＣ－带技术对亲本及杂种Ｆ＿１的体细胞染色体进行了分析，并研究了它们的性状。结果表明体细胞染色体组成与植株性状有密切的关系；并发现八倍体小黑麦的染色体数目不稳定，有自然减小的趋势。同时，用ＧｉｅｍｓａＣ－带技术研究了八倍体小黑麦及Ｆ＿１杂种花粉母细胞的减数分裂行为。表明：减数分裂不规则是八倍体小黑麦结实率低、籽粒皱缩的重要原因之一；Ｆ＿１杂种后代的中期染色体基本构型为２１Ⅱ＋７Ⅰ，减数分裂更加的不规则，但通过分离和重组，可产生各种类型的配子，从后代中可选出稳定、高产的重组品系，对改进八倍体小黑麦的不良性状有重要的意义。

Abstract:The method of heat therapy plantlets followed by shoot tip culture In Vitro to eliminate virusdiseases in 7 table grape varieties were studied.The results showed that 61.2% of shoot tips ex-cised from heat therapy plantlets In Vitro survived and 18.1% of

Abstract:本研究的目的是寻找一种可行的花粉贮藏方法。我们采用快速冷冻－真空干燥－常低温保存的方法进行花粉贮藏研究。对贮藏花粉分别作了活性染色，过氧化物酶同工酶活性分析及花粉培养，以测定其生活力（以下称活力）。研究表明，快速冷冻－真空干燥－常低温（－１０℃─－２０℃）保存玉米花粉的方法是可行的。保存１５０天的玉米花粉仍有８％的萌发率。同时证明，常用的各种染色方法只能反映花粉的成熟度，而不能作为检验花粉是否具有活力的唯一标准。而花粉是否能够萌发，即长出正常的花粉管，才是判断花粉活力的主要指标。

Abstract:When different combination of GA_3,KT and nutriment solution were applied to Oyster mushroom.It was observed that effects was differentiol on bypha growth applicably combination of GA_3,KT could increase the branch of hypha,the yield and qulity of fruitin

Abstract:将浸泡５ｈ的小麦粒，置于各种强度的磁场下１２ｈ，测其发芽率，以２００Ｏｅ的效果最好。同样材料用各种强度磁场处理４８ｈ，当长成苗后，发现处理的株高普遍高于对照，相同的幼苗，经０．７９－１．５９ｍｇｍ￣（－３）浓度的Ｏ＿３熏气６、９、１２ｈ，经２００、４００Ｏｅ磁场强度处理的材料，叶片细胞外渗液中核酸和可溶性糖含量较对照低，叶内可溶性糖含量多数情况也低于对照，而叶绿素含量却不同程度地高于对照，总的说明２００－４００Ｏｅ范围的外磁场处理可促进小麦的萌发和生长，并对Ｏ＿３伤害有一定防护作用。

Abstract:Spring wheat plants(Triticum aestivum L.)were fumigated with ozone(O_3)and hydrogenfluoride(HF)alone or the combination of the both in open-top chambers.The effects of the fu-migation on morphology,membrane permeability,carbohydrates metabolism and chloro

Abstract:Byusing N.commune and alkali paper,we synchronously monitored the Sulfur Dioxide con-centration inside a smeltry and around it in Baiyin region.Based on correlation analysis,the sul-fur contents in N.commune was closely related to the SO_2 concentration i

Abstract:This paper has sorted out 20 species and 3 varictics of the Subgen.Cercidothrix Bunge ofthe genus Astragalus Linn.from Gansu.The species key,the document,the distribution andhabitats of every species has been put cut.

Abstract:The basdiodarps of most species in Lycoperdaceae can be used as edible or efficient medicine which have functions of anticancer,hemostasis and contracting muscle.In order to exploit and utilize the valuable fungi abundantly,this paper has studied the spec

Abstract:This paper mainly analyses the distribution types of the 48 genera of rare and endangeredplants and their geographic distribution of 51 species(including varieties)as well as the flora char-acteristics in Gansu Province.

Abstract:Firstly,the geographical distribution outtline on species and sections within the genus Hip-pophae L.have been described in this paper.The facts indicate that the areal type of the genusbelongs to Old World temperate,the species of the genus are floristic

Abstract:The present distribution and the area of Potaninia mongolica were investigated,the naturallife habits and propagating way of the plant were observed.It was found that rooting on thebranches covered by sand grains is one of the important propagating way fo

Abstract:本文研究了草莓（Ｆｒａｇａｒｉａ×ａｎａｎａｓｓａＤｕｃｈ．）果实红色素的可见吸收光谱、光稳定性、热稳定性、耐氧化还原性、耐糖性以及金属离子、ｐＨ的变化对色素的影响。结果表明，草莓果实红色素的提取方法简单易行，色素性质优良。该色素具有广阔的开发应用前景。

Abstract:Analysis of isoperoxidase of 36 kinds of day lily(Hemerocallis citrina Baroni)collected from 16 regions of China by polyacrylamide gel vertical slab electrophoresis,and their main characters and agronomic characters observed from the year 1987-1994.The re

Abstract:对张掖具代表性的五个人工地塘的浮游植物四季采样，共获７９种（未鉴定到种的按一种计），其中蓝藻１２种，绿藻３２种，硅藻１８种，甲藻３种，裸藻８种，黄藻、隐藻和金藻各２种。浮游植物的年平均密度为５７８．２３６万个／Ｌ，生物量为３．１０４０ｍｇ／Ｌ。不同池塘中的现存量有一定的差别，种类以流泉最高，生物量以市鱼场最高。文中对浮游植物的季节变动作了分析，并对浮游植物的产鱼潜力进行了初步估算。

Abstract:The three brccd varieties anthers of variant fertility of citron daylily(Hemerocallis citrina),in cluding Gaoting daylily,Malian daylily and Shayuan daylily and one species of orange daylily(H.fulve) were examined.The pollen activity and the plasmic membr

Abstract:Different factors affected on cardiac glyoside content of the young leavs of Digitalis in vitroculture.The component of cuiture medium was very important to the compost of cardiac glyco-side and MS+2,4-D1.0mg/L+BA1.5mg/L+activedcarbon 0.5%obviously advanc