Abstract:本文对浙江产杜鹃花属１３个种（录属５个亚属７个组）的种子形态进行了研究。比较观察了种子形状、大小、扁化率，翅和表面结构等形态学特征，井对该属种子形态的演化趋势、种于类型的划分及种子形态在分类学上的意义进行了讨论。结果表明种子形态特征与植物习性和形态特征一定程度上相关，反映了周内类群的分化，因而种子形态在杜鹃花属的系统研究中是不可忽视的性状。

Abstract:This paper reports the pollen morphdogy of Paramichelia baillonii,as the only representativeof the genus from China and Tsoongiodendron odorum, the species of the monotypic genus,Thepollen grains of the 2 species show similariries under the LM and SEM,But

Abstract:The Features of the leaf surface were studied about the nine groups of Dendranthema in East-North of China(D. indicum(L.)Des.Moul.D indicum var.huludoensis G.Y.Zhang.L.J.Yu etY.J.Liu;D. naktongense(Nakai)Tzrel.D,chanetii(levl)Shih,D,lavandulifolium(Fisch

Abstract:Observation tO the morphologic character and anatomical structure of ten psammophytes inXinjiang revealed that in order to adapt desert environment,these plants formed various types ofstructures.The leaves have three types of shapes:the lamina is reduced

Abstract:The connectiOn of the anther vvas always small and mal-developed in the sterile line,The tape-tle cells degenerated earlier than the fertile line,so the loculi of the anther sac were empty,Some-times there were sterile grains in the pollen sac.Prior to th

Abstract:Anatomical observation is made on the vegetative organs and the protocorm of Cymbidiumhybridum.The results show that root consists of multiple epidermis,cortex and vascular cylinder.There are many root hair.The cortex and the endodermal are developed.Prim

Abstract:Eight species of Salix growing in Animaqing mountain of Qinghai-Tibetan Plateau were mor-phologically and anatomically studied.It was shown that the leaves of the these plants apart fromS,matsudana comprised palisades and spongy parenchyma and that the pa

Abstract:本文对杉木（Ｃｕｎｎｉｎｇｈａｍｉａｌａｎｃｅｏｌａｔａ（Ｌａｍｂ．）Ｈｏｏｋ．）雄性不育株与可育株在小孢子发生和发育过程中的雄球花和叶进行过氧化物酶同工酶和呼吸强度的研究。结果表明：可育株雄球花在其小孢子发生和发育过程中有三个呼吸高峰，可划分为７个时期－－花芽分化期、小孢子囊分化和造孢细胞形成期、造孢细胞＂休眠＂期、小孢子母细胞形成和减数分裂期、四分体时期、雄配子体形成期、撒粉期。而不育株只出现前二个呼吸峰和前５个时期，在小孢子母细胞形成后，呼吸强度降至低谷，导致能量供应短缺和减数分裂异常，引起败育。不育株叶在其造抱细胞＂休眠＂期无呼吸峰出现可能与其败育有关。不耷株雄球花过氧化物酶同工酶酶谱明显不同于可育株。作者认为：杉木雄性不育是由核不育基因和细胞质不育基因共同调控的结果，调控过氧化物酶同工酶表达可能有三种不同的遗传功能。过氧化物酶对呼吸作用有一定影响，但各种过氧化物酶同工酶并非等效。

Abstract:分别截取野生大豆根尖分生区、伸长区和成熟区细胞，用Ｈｏｅｃｈｓｔ３３２５８对ＤＮＡ进行专一染邑，通过计算机数字图象处理系统，采用灰度测量法原位测定根尖不同区的ＤＮＡ含量。同理取烟草根尖不同区细胞，用率尔根反应对ＤＮＡ进行专一染色，并由与扫描显微光度计相联的数字图象处理系统原位测定备区域中细胞的ＤＮＡ含量。发现从分生区到成熟区，细胞核ＤＮＡ含量呈递增趋势。分化的细胞中含量异常增高而不分裂，说明ＤＮＡ的动态变化与发育和分化存在着某种联系。细胞图象分析的结果表明三个区的细胞面积、最大径、最小径及形态因子也沿分生区到成熟区呈递增趋势。

Abstract:The quantitative requirement of nitrogen for the mycelial growth and fruiting initia tion ofPleurotus ostreatus is studies on chemically defined media with different nitrogen content in them.The mycelial can well growth in a relatively wide range of nitro

Abstract:Nostoc commune is a kind of plant in Cyanophyta which has the function of biologicla nitrogenfixation. Observatious indicate that it can improve fertility level when added to tomato during thestage of nutritive growth and early florescence,It can be added

Abstract:The photosynthetic stem of Eleorharis tuberosa originates from tbe axil of the inverted 2nd or3rd leaf of the main fleshy stem.Two sheath-like leaves mav be found at the base of photosyn-thetic stem which provide protection for the stem to emerge from gro

Abstract:对比分析了沙冬青、油蒿的光合膜系统在人工补水条件与自然水分条件下的结构特点。结果表明，自然生长状态下的沙冬育与油蒿的光合膜系统均比人工补水条件下植株的简单，表现在基粒片层的叠垛程度降低，基粒片层与基质片层比率下降，其中自然水分条件下的沙冬育最明显。同时沙冬青叶绿体中能量型贮藏物质多于的油蒿。分析认为自然水分条件下植株光合膜的简单化可能是光系统Ⅰ、Ⅱ适应环境的表现；充足的水分保障了人工养护株发育出更为完善的光合膜系统。而沙冬育中多量的能量型贮藏物质与植株保持四季常绿有关。

Abstract:The floral nectaries of Brassica campestris Linn,consist of four glands,which includes lateralpair and median pair,All of them were composed of epidermis and nectariferous tissues as well asthe vascular bundels.The nectary primodia did not occure unill th

Abstract:According to the structure of vegetive orgons and water physiological characteristics,Fritillari-a pallidifflora is a mesophytes,not showing special xeromorphic structure and special resistance todesiccation.It is distributed in drought babitat,the cause

Abstract:The seedings of Glycyrrhiza uralensis have tap-root system.Promeristem is composed ofthree layers of cells in root tip,of them,outer layer of cells form the epidermis and root cap,centraland inner layers of cells sepratedly form the cortex and vascular cy

Abstract:The male flowers have four papillary-sbapednectaries which occur at the top of ovary of re-duced pistil.The female flower have three cylinder-shaped nectaries which are present among thebases of three styles,Both of nectaries consists of epidermis,nectari

Abstract:The effect of pendimethlin on cell mitosis of maize seedling advantitious root tip was studied inthis paper.The results showed that pendimethalin is a herbicide interfering cell division,The mito-sis of pendimethalin treated root was arrested at metaphase