Abstract:variety immature spike and 6 varietal young embryo of Hordeum distichum,2n= 24,were cultured on MS medium with 500 mg/L caseinhydrolysate,150 mg/L L-Asparagineand 2 mg/L2,4-D(M_(320)).The callus began to be formed.Trasplanted calli from young em-bryo of D

Abstract:大麦苏啤一号在不同的生育期进行盐处理对产量的影响不同。播种出苗期和花粉母细胞形成至受精结束这两个时期对盐渍较为敏感，其次是灌浆成熟期和苗期。幼穗分化期对盐胁迫相对较不敏感。播种出苗期盐处理对种子萌发率影响不大，但严重抑制幼苗的早期生长和分蘖；另一方面，花粉母细胞形成期盐处理会显著影响小孢子的发育，降低花粉活力，使结实率下降，这可能是花粉母细胞形成至受精结束这段时期对盐胁迫敏感的一个重要原因。

Abstract:The calli with a higher capacity of redifferentiation selected from somaclonal calli of As-tragalus melilotoides Pall.were transfered to fluid medium S_(12) ,which had been screened frommany different media and was suitable for suspension culture of this

Abstract:结球甘蓝离体下胚轴培养初期，在切口较深层发现的维管组织结节，是由外植体维管组织衍化的。愈伤维管组织既可由愈伤薄壁细胞分化，也可由愈伤形成层分化。愈伤形成层向内分化导管分子，向外没有发现筛分子的分化。愈伤维管组织有不同的形态，起初常各不相连，后和外植体维管组织衔接。芽的再生起初和愈伤维管组织没有直接的联系，后原形成层自上而下分化，逐渐与愈伤维管组织相连接。不定根发生于维管组织结节的单向极性分化，始终

Abstract:The present paper deals with the morphological and anatomical characteritics of vegeta-tive organs of the Saruma Oliv.(Aristolochiaceae).First paper character from the leaf archi-tecture ,The epidermal struxture and surface of the ultramicroscopic structu

Abstract:The four-lobed disc nectary of Mentha haplocalyx is at the base of ovary. The nectary iscomposed of an epidermis and 3-4 layers of nectariferous tissue which lacks special vascularbundle. The thin-cuticle and normal stoma exist in the epidermis.The epider

Abstract:非感光性莴苣（挂丝红品种）种子于２２℃下萌发率在８０％左右，而２８℃下不萌发。２２℃下外源亚精胺显著促进种子萌发，多胺生物合成抑制剂ＤＦＭＡ和ＤＣＨＡ明显抑制种子萌发，而ＤＦＭＯ无效。２２℃诱导种子萌发过程中内源腐胺和亚精含量显著高于２８℃下它们的含量。ＧＡ３处理能诱导２８℃下种子的萌发，单独外源亚精胺处理效果不大，而外源亚精胺对ＧＡ３诱导效应有促进作用。ＤＦ－ＭＡ和ＤＣＨＡ能抑制ＧＡ３诱导２８℃

Abstract:实验结果表明：棉花根和下胚轴ＰＭ脂肪酸主要由棕榈酸（１６：０），硬脂酸（１８：０），亚油酸（１８：２）和亚麻酸（１８：３）组成。用－０．３ＭＰａ和－１．１ＭＰａ根际胁迫，棉花根和下胚轴ＰＭ饱和脂肪酸含量增加，不饱和脂肪酸和不饱和指数（ＩＵＦＡ）降低，这几种组分中棕榈酸含量上升较大，亚麻酸含量下降较大。胁迫处理使膜透性增高，脂肪酸组分发生变化，致使ＰＭ Ｈ＾＋－ＡＴＰａｓｅ，Ｃａ＾＋＋－ＡＴＰ－ａｓ

Abstract:The effects of dark treatment,light intensky, CO_2 level, potassium deficiency anddrought treatment on photosynthetic induction of maize slices were studied. Results indicatedthat long dark period,high light intensity,low CO_2 concentration, potassium def

Abstract:This paper discussed the characteristics of Mahan Mountains flora with principal Com-ponents Analysis (P.C.A.)and information Cluster Analysis(I.C.A.)comparative studybetween the flora of Mahan Mountains and ten other floristics. The results show:1.The se

Abstract:东昆仑山及其毗邻地区位于青藏高原的东北隅，约占北纬３１°３９′－３９°１９′，东经８５°３５′－１０３°０４′，面积约７２万ｋｍ＾２。本区的蕨类植物就目前所知有４８种，隶属于１３科１９属，分别占全国蕨类植物总科数的２１．３１％，总属数的８．５２％，总种数的１．９２％，集中分布于本区东部的高山峡谷区。其分布区北起本区北部的祁连山东段，向南经西倾山、阿尼玛卿山和巴颜喀喇山至唐古拉山东段，呈孤形围绕在本

Abstract:本文报道了中国蹄盖蕨属日本蹄盖蕨组植物２系８种，有分种检索表，文献引证和标本引证以及本组植物的分布。

Abstract:By the principal component analysis of the leaf characteristc of fourteen Paulownia clones inthe nursery,the eresults show the leaf area and shape are the main factors of differences in theleaf characteristic of Paulownia clones in the seedling stage. T

Abstract:By means of systematic clustering analysis method,theresults of mathematic analysis of thegenus Sinowilsonia and its closely rela ted genera,Distylium,Corylopsis,Fortunearia ,andHamamelis account for that Sinowilsonia and Fortunearia are the best closaly