Abstract:From 1981 to 1990,author observed the reproductive characteristics of Bashania fangenia include blossoming, bearing fruit,sprouting of seed, seedling renovating etc.The blooming cycle of Bashania fangenia is 45 to 55 years.And its blooming phase is about

Abstract:玉米产量与吐丝期至成热期干物质积累量和这一阶段群体库源特征密切相关。紧凑型玉米比平展型玉米，吐丝至成熟期的于物质积累量高３０８７．６－４５２５．５ｋｇ／ｈｍ￣２，群体库容量大（１３２２．６－１５１６．８ｇ／ｍ￣２），源供应能力强（１０７３．０－１１６８．８ｇ／ｍ￣２），库源比值适宜（１．４５左右），因而籽粒产量相戍提高了２２１４．０－２７１６．５ｋｇ／ｈｍ￣２。玉米品种改良的关键是提高吐丝后群体物质生产效率和光合生产效率，同时使群体库源关系协调发展，相对平衡.

Abstract:Perxidase isozymes in 10 organs of male-sterile line and maintainer line were examined inO. sative(keng-type).It was found that 9 kinds of peroxidase isozymes have been showed.POD_5, POD_6 were present in all 10 organs, the authors suggested that POD_5,

Abstract:The electrophoresis of protein with the single pollen grains of Cucurbita pepo L. had beenproceed in this paper.The result revealed that characterized protein bands were found in differentdevelopmental stage of the pollens from Cucurbita pepo L.. The

Abstract:采用ＰＥＧ沉淀和差速离心的方法提纯雀麦花叶病毒的Ｇ和Ｔ分离物。利用蛋白酶Ｋ和两相酚法制备雀麦花叶病毒的总ＲＮＡｓ。将Ｇ和Ｔ分离物ＲＮＡｓ进行琼脂糖凝胶电泳，结果发现Ｂｒ－ＭＶ－Ｇ除含有正常的ＲＮＡ组分外，还出现了另一新的ＲＮＡ＿（３ｂ）组分，其分子量为０．５０×１０￣６。ＲＮＡ＿（３ｂ）只出现在大麦寄主中，而在昆诺基上缺失。ＲＮＡ＿（３ｂ）仅依靠于其来源的Ｇ分离物的ＲＮＡｓ进行复制。以ＲＮＡ＿（３ｂ）为模板合成￣（３２）Ｐ－ｃＤＮＡ探针，和ＢｒＭＶ－Ｇ分离物的ＲＮＡｓ进行分子杂交试验表明：ＲＮＡ＿（３ｂ）属ＲＮＡ＿３的缺陷型组分，它依赖于ＢｒＭＶ－Ｇ－ＲＮＡ＿３的帮助才能在大麦寄主中复制。ＲＮＡ＿（３ｂ）的出现和缺失对ＢｒＭＶ的症状表现没有影响。

Abstract:The relative water content and water potential of leaf gradually decreased with decline of os-matic potential under stress of various polyethylene glycol solution in wheat seedling. At the sametime,relative permeability of membrane increased,chlorophyll a

Abstract:The goal of this study was to explore the effects of water content of soil,relative water con-tent and water potential of wheat leaves and high air temperature,low air relative humidity understrong light in the field to the midday depression of diurnal va

Abstract:Ontogeny and distribution of gynoecium transmitting tissue in the genus Liriodendron L.have been investigated through light microscope and normal paraffin embed preparation tech-nique. Epidermis and subepidermis cells of carpellary margins or their inner

Abstract:根据定位观测和实地调查资料研究了油橄榄在陕南地区的生长发育和环境条件的关系，油橄榄树的枝条日高生长量为昼夜生长类型。夜间生长高于昼间的１２１％－１６０％；６、７、８、９月的生长量占全年生长量的７６％。油橄榄树的年生长量和产量状况与土壤含水量和土壤质地性质有密切关系；油橄榄树为阳性树种，在增加光照的环境条件下生长和结实良好，反之较差。

Abstract:The result of association coefficient showed that Quercus aliena var. acuteserrata and Corylus heterophylla belong to Posstive association. They were under similar circumstances,and Lespedera formosa belong to negetive assocoation. Their reactions

Abstract:采用“分离法加工薯蓣植物”的工艺技术是将薯蓣根茎带水磨碎，在水中筛分，将各有用成分分开后，分别采用适宜的方法加工利用。本文报道利用薯蓣植物盾叶薯蓣（ＤｉｏｓｃｏｒｅａｚｉｎｇｉｂｅｒｅｎｓｉｓＣ．Ｈ．Ｗｒｉｇｈｔ）和穿龙薯蓣（ＤｉｏｓｃｏｒｅａｎｉｐｐｏｎｉｃａＭａｋｉｎｏ）制取薯蓣皂甙元（Ｄｉｏｓｇｅｎｉｎ）和药用酵母粉（Ｓａｃｃｈａｒｏｍｙｃｅｓｓｉｃｃｕｍ）的方法。

Abstract:By means of polyarcylamide electrophoresis,proxdase isoenzyme of 2 specics of Cirsium:C.setosum and C.segetum,which are morphologically very similar,have been comparatively studied at defferent development stages and on the wild and cultivated conditi

Abstract:用蔗糖密度梯度离心法从对照和盐处理的盐生车前根中分离出液泡膜，并对其ＡＴＰａｓｅ某些特性进行了比较研究，蔗糖连续密度梯度离心后ＮＯ＾－３敏感的ＡＴＰａｓｅ活性主要分布在２２％－３５％蔗糖浓度之间，用不连续密度梯度离心法从２２％－３５％界面收集到的膜主要源于液泡膜。因为，这种膜ＡＴＰａｓｅ活性受到Ｃｌ＾－的促进和ＮＯ＾－３的强抑制，而叠氮化钠和正钡酸钠只抑制酶活性的１０％左右，最适ｐＨ８．０。

Abstract:This paper deals with fruit development process and its anatomy structure of Pyracantha.The hypanthium is deep cup-shaped. Its gynaecium has five free carpels,with half-inferior ovary.Druing fruit maturity , the hypanthium by the cells enlargement ma

Abstract:利用Ｓｉｍｐｓｏｎ优势度指标对青海湖湖贫南岸的植物群落优势度进行了测定，并讨论了群落生态优势与海拔梯度之间的相互关系。结果表明，海拔梯度是通过影响群落内和中群组成影响群落的生态优势度，群落生态优势度与群落内植物种群数呈相关，群落内种群越丰富，群落生态优势度就越小，反之越大。