Abstract:12 d龄的春小麦幼苗在 1 mmol· L- 1及 1 0 mmol· L- 1H2 O2 的胁迫锻炼过程中 ,质膜透性增大 ,O- · 及 H2 O2 含量增多 ,CAT活性升高 ,叶绿素含量降低 ,低浓度 H2 O2 胁迫使SOD活性上升 ,高浓度时却使其活性下降。经过 H2 O2 胁迫锻炼后的小麦遭受干旱胁迫时 ,叶绿素含量、SOD活性、CAT活性均高于对照组 ,而质膜透性、O- · 及 H2 O2 含量却低于对照组。表明 H2 O2 胁迫锻炼 ,提高了小麦幼苗的抗氧化能力 ,增强了其抗旱性

Abstract:２个双倍体即Ｃ．Ｓ－Ｔｈｉｎｏｐｙｒｕｍ ｂｅｓｓａｒａｂｉｃｕｍ（ＡＡＢＢＤＤＪＪ ２ｎ＝８ｘ＝５６）和ＧＨＫ－Ｔｈｉｎｏｐｙｒｕｍ ｅｌｏｎｇａｔｕｍ（ＡＡＢＢＤＤＥＥ ２ｎ＝８ｘ＝５６）与普通小麦“中国春”杂交，获得了２个七倍体杂种。对２３个双倍体、中国春、杂种Ｆ１和部分Ｆ２进行麦谷蛋白ＳＤＳ－Ｐａｇｅ电泳，及结合染色体分带技术和田间赤霉病抗性鉴定筛选出由Ｔｈ．ｂｅｓｓａｒａｂｉｃｕｍ和Ｔｈ

Abstract:利用不同浓度ＮａＣｌ处理高冰草、小麦、小麦和高冰草体细胞杂种Ｆ３代Ⅲ－１、Ⅱ－２的幼苗，５ｄ后观察其形态，计算耐盐系数，测定生长量脯按酸含量，Ｎａ＾＋、Ｋ＾＋、Ｃａ＾＋等生理指标。结果表明，高冰草具有典型耐盐单子叶植物的特征，。亲本小麦属非生植物，抗盐能力较弱，当ＮａＣｌ浓度达０．５％时已有盐害影响，超过后迅速加重甚至死亡，而杂 受害的盐度比小麦高。１．０％以上ＮａＣｌ浓度达０．５％时已有盐害影

Abstract:This paper was the identification results of powdery mildew (\%Ergsiphe graminis\% f.sp.\%tritici\%) resistance genes in some common wheat (37 accessions) of China.There are 19 accessions which has no resistance genes,6 accessions which has Pm8 gene from

Abstract:油菜 CMS柱头与花粉亲和性的比较研究表明 :授粉后 2 4 h、30 h和 48h,平均结籽率、结角率和角粒数分别达最大值 ,授粉后 30 h以内为柱头受精能力最强的时期 ;参试的几个 CMS柱头与花粉的亲和性差异显著 ,表现为 A3>A1>A2 ,各杂交组合亲和能力依次为 A3× B2 >A1× B1>A3× B1>A1× B2 >A2 × B1>A2 × B2 ,说明不育系陕 3A的亲和性优于陕 2 A;甘蓝型油菜 CMS开花 2～ 3d内柱头亲和性最强 ,受精结实率最高 ,开花 4～ 5d后受精结实能力急降 ,7d后则几乎失去受精结实能力。

Abstract:Optimal shoot differentiation from hypocotyl explants of Linum usitatissium was MS medium supplemented with BA 1 mg/L and IAA 0.5 mg/L,which resulted in 97% of shoot regeneration frequency.The hypocotyl explants were infected by Agrobacterium tumefa

Abstract:将生长１４ｄ的海边香豌豆（Ｌａｔｈｙｒｕｓ ｍａｒｉｔｉｍｕｓ（Ｌ．）Ｂｉｇｅｌ）无菌苗下胚轴切成０．５ｃｍ左右的片段，置于含有１ｍｇ／Ｌ２，４－Ｄ，０．５ｍｇ／Ｌ ＢＡ和０．５％ＮａＣｌ的ＭＳ培养基中，２８ｄ后诱导出胚性愈伤组织。将其转入含有适当浓度２，４－Ｄ的ＭＳ培养基上，又２８ｄ后可得到大量球形胚和心形胚以及极少量鱼雷胚和子叶胚。诱导体细胞胚适合的２，４－Ｄ浓度为０．５ｍｇ／Ｌ。较高浓度的２

Abstract:Purified cucumber cotyledon chloroplasts were treated with IAA (<10 -4 mol/L) and/or KCN (10 -3 mol/L).IAA would promote the DCPIP photoreduction by the chloroplasts from 6 d and 16 d cotyledon.But the promotion to the oxidable oxygen release wa

Abstract:以民勤小枣幼茎和幼叶为外植体，诱导出愈伤组织，用茎尖诱导生根获得再生植株。从茎段诱导的愈伤组织属淡绿色致密的Ⅰ型和白色疏松的Ⅱ型。它们都是非胚性愈伤组织。研究了渗透压、外植体取材时间等因素对愈伤组织诱导及生长的影响。幼嫩的材料易诱导出愈伤组织，在各种基本培养基中，以３／４ＭＳ培养基诱导率最高，暗培养较光下培养有利，３％￣５％蔗糖浓度最适宜，而高渗透压不利。各种激素对继代培养的作用依次是２，４－Ｄ〉

Abstract:Effect of different phytohormone concentrations on organ differentiation into buds from floral receptacles plants of apomictic rape AMR 1 plants \%in vitro\% culture were studied.The result show:(1) the frequency of the direct bud organogenesis in floral

Abstract:用不同浓度的 PEG60 0 0对两个抗旱性不同的小麦品种进行干旱胁迫 ,抗旱品种的DNA合成抑制程度明显低于干旱敏感品种 ,单独增加 3种主要活性氧 · O- 2 、HO· 、H2 O2 之一 ,结果亦然 ,其中以 HO· 抑制 DNA合成作用最强。加入活性氧清除剂 VC或 DMSO可部分抵消干旱胁迫或单独增加活性氧引起的 DNA合成抑制。结果表明小麦的抗旱性与干旱胁迫后 DNA合成水平具有密切联系。

Abstract:

Abstract:研究了大田栽培和自然光条件下 ,模拟 UV- B辐射 ( UV- B,2 80～ 31 5nm)增强对麦田生态系统能量累积和流动的影响。在 5.31 k J· m- 2 UV- B辐射下 ,春小麦群体不同生育期叶、茎、根、穗、粒生物量和总生物量显著降低 ,各部位热值没有显著变化 ,各部位能量累积和总能量累积显著降低。能量累积与生物量呈极显著正相关 ,而与热值没有显著的相关性 ,可能生物量比热值对能量累积的贡献更大。 UV- B辐射显著降低春小麦群体能量输出 ,可能导致麦田生态系统能量流动功能下降。

Abstract:用叶绿康球肥在苹果、梨、桃和李树上进行大田对比试验，通过田间调查和室内分析，研究了球肥对果树叶片的复绿效果、对叶内矿质营养元素及叶绿素含量的影响以及对果树的增产效果和改善苹果品质的作用等。研究结果表明：施用叶绿康球肥可使失绿果树叶片的活性铁提高８．７％￣２０．２％，苹果叶片的叶绿素含量提高１８％；果树失绿程度降低２￣３级，果实单产提高５６％￣８９％。可降低叶片中Ｐ、Ｋ、Ｚｎ、Ｍｎ、Ｃｕ的含量，使铁

Abstract:In this study,the wheat seedlings were treated with Cd 2+ solution,the effects of Cd 2+ on the biological effect of the crop were investigated.The results were summarized as follows,the malondialdehyde (MDA) content kept high level.The activity

Abstract:Using 14 C tracing technique,the 14 C assimilation and partitioning of 14 C assimilates of the cotton plant with monopodial branches were studied.The results were as follows:the 14 C assimilation of the leaves on main stem and fru

Abstract:The effect of IAA on soybean seedlings cell membrance injury and the capacity of resistance to saline enviroment were investigated by mean of water culture.The results proved that IAA could promote the growth of soybean seedlings under certain salt stress

Abstract:Astragalus dshimensis Gontsh.and A.hoantchy Franch.are one pair of disjunctive species between the eastern and the western parts of Mongolia-Xinjiang Desert.Because of their morphological similarities,they were treated as two subspecies under the na

Abstract:采用ＰＣＲ直接测序的方法对中国柽柳科３属１０种代表植物的ＩＴＳ序列进行了比较研究，结果表明，属内片段长度、ＧＣ含量和位点变异量上均比较一致；ＩＴＳ－１长度为２４９￣２６９，ＩＴＳ－２长度为２２４￣２５３，ＧＣ含量４６％￣６３％，信息位点占总位点的３０％。运用ＰＡＵＰ软件分析得到了单个最简约树，总步长为３９５步，一致性指数ＣＩ＝０．９１６，保持性指数ＲＩ＝０．８８６。柽柳属的６个类群县１００％的强支

Abstract:对独叶草营养繁殖中根状茎的生长和分枝方式及克隆植株产生方式的研究表明 :( 1 )独叶草的根状茎的生长方式为游击型的 ,新分枝可由顶芽或侧芽产生 ,各分枝与上一级的夹角在 50°～ 1 2 0°之间 ;( 2 )独叶草是通过根状茎断裂的方式来增加克隆植株的 ,这种断裂发生在 3年以上生的根状茎上 ,从内部结构上看 ,根状茎断裂是由于组织破碎引起的。

Abstract:Juglans mandshurica is one of the most important component species of the mixed forest of the broadleaved species and Korean pine forest in the eastern mountains in Northeast China.Based on the continuous investigation of the located tree and branch,tak

Abstract:Through an investigation on the conditions of plant and vegetation of reservoir region and analyses of factor of influence upon the Jiu Dian Xia key water control project of the Taohe river to plants and vegetation in reservoir region,this paper set up th

Abstract:黑河流域中游位于河西走廓中段 ,界于东经 90°2 0′～ 1 0 2°1 2′,北纬 37°2 8′～ 39°57′。经调查有 1 1种水生植物群落 :线叶眼子菜群落 ( Co.Potamogeton pusillus)、线叶眼子菜—狐尾藻群落 ( Co.P.pusillus- Myriophyllum spicatum)、水菖蒲群落 ( Co.Acorus calamus)、沼针蔺群落 ( Co.Eleocharis valleulosa)、沼针蔺—水葱群落 ( Co.E.valleulosa- Scirpus triqueter)、芦苇群落 ( Co.Phragmites communis)、镳草—水烛群落 ( Co.Scirpus triqueter)、浮叶眼子菜群落( Co.Potamogeton natans)、浮叶眼子菜—狐尾藻群落 ( Co.P.natans- Myriophyllumverticillatum )、黑三棱群落 ( Co.Sparganium stoloniferum)、小花灯芯草—泽泻群落 ( Co.Juncua articulatus- Alisma orientale)。在以上群落中有水生植物 38种。世界淡水广布群落是本区的主要群落 ,阐述了水生植物群落的形态特征、分布现状、生长环境和群落结构等特征并探讨了其演替规律。

Abstract:This paper deals with the endemism in the flora of Shandong province.There are three main conclusion as follows:(1) There are 53 species of vascular plants are endemic to Shandong province after revison.(2) Four areal types of endemic species are put for

Abstract:革苞菊为雌划株。在雄花中，花药４室，药壁发育为双子叶型，由表皮、药室内壁，一层中层和绒毡层组成。绒毡层于小孢子四分体时期开始变形，其细胞原生质体向药室中移动，为变形绒毡层，小孢子孢原为多细胞，小孢子母细胞减数分裂产生四面体型的小孢子四分体，四分体胞质分裂为同时型。成熟花粉３－细胞型。单核期的小孢子出现壁发育不良和巨大及空花粉现象。在雌花中，胚珠是一的，单珠被，薄珠心，珠被于孢原期已发育完整。大孢子

Abstract:In this paper,the meiotic behavior of pollen mother cells of cultivated variety of P.rockii is first reported.As a result of cytological observation,there are about 33% pollen mother celles that the behavior of meiotic division is abnormal.Experimenta

Abstract:八角枫为顶生胎座、倒生胚珠、单珠被。孢原细胞处于珠心表皮之下，直接起大孢子母细胞的功能。珠心表皮细胞平周分裂产生多层珠心周缘细胞，为厚珠心。四分体线行排列，合点端的大孢子发育为蓼型胚囊。开花前，两极核事例成次生核，或不融合仍保留极核状态。反足细胞退化较晚，胚囊合点端具承珠盘。

Abstract:Micromorphological characters of the seeds of Apocynum venetum L.and Poacyunm hendersonii (Hook.f.) Woodson were examined by stereoscope and scanning electron microscope (SEM).The results show that they are very similar in micromorphological chara

Abstract:With the normal paraffin sectioning,the fruit development of dwarf cherry was anatomically studied by the authors.The process of fruit development can be divided into three stages:Stage 1 is the vigrous division and enlargement of fruit cells.During Stage

Abstract:利用定样平行配套观测方法 ,研究了龙须草叶片形态结构和光合、蒸腾等生理功能 ,结果表明 :龙须草叶片呈长剑形 ,叶长为 35～ 1 50 cm,最长可达 2 0 0 cm以上 ,叶宽为 0 .1 9～0 .48cm;功能叶结构具有典型的 C4 “花环结构”;上表皮中具有十分发达的保护水分过度蒸腾的“泡状细胞”;上表皮气孔分布密度大于下表皮。功能叶叶绿素 a/ b值为 3.2 8± 0 .2 6。背面叶平均光合强度为 62 .4( CO2 mg/ dm2 · h)、呼吸强度为 3.57( CO2 mg/ dm2 · h)、蒸腾强度为 372 6( H2 O mg/ dm2 · h)、气孔阻力为 0 .2 1 ( sec./ cm)、水分利用效率为 1 6.747。背面叶的光合强度和蒸腾强度明显高于腹面叶。

Abstract:The underground organs of Pueraria lobata are included primary root,tuberous root,adventitious root and rhizome.The primary root is tetrarch,and endodermis with casparian strip is obvious.The secondary xylem of tuberous root is well developed,and ther