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In previous study,the ability of plant resist-drought almost focuses on plant foot,corm and leaf,except seed, especially,large number kinds of plant species is not report.

以往的植物抗旱性研究,多集中在植物成株后的根、茎、叶组织等方面,而对种子的抗旱性研究较少,特别是对批量旱生植物种子,在各种水分条件下的响应方式的研究未见报道。

Another trend apparent throughout the tribe is the reduction of the large, terminal inflorescence to a few digitate or paired racemes, often arising from the axils of specialized leaves with inflated sheaths and reduced blades. In the most complex genera the ultimate unit is a boat-shaped sheath without a blade subtending 1 or 2 short racemes, and by repeated branching many of these units are gathered into a leafy compound panicle.The spikelets contain 2 florets, but this is not obvious as the florets are delicate and usually reduced.

Another趋势对一些指状的或的大,顶生的开花的减少配对总状花序,在最多复合体属里末级的单位是一舟状的没有一叶片对着1或2短总状花序的鞘,并且通过被重复的分枝大多数这些件被收集成为一多叶的复合的panicle。

The energy-dispersive X-ray analysis showed that the endodermis with Casparian strips in primary and two-year-old leaves functioned as apoplastic barriers against Na and Cl. However, no blockage of Na and Cl in cotyledon was observed when they passed endodermis.

对相应区域的X射线微区分析表明,子叶内皮层对Na和Cl在质外体运输中不起障碍作用,而初生叶与2 a生针叶内皮层阻碍Na和Cl以质外体途径进入维管组织。

The antifungal activities of these materials were investigated and build foundation to develop low poison plant antifungal products. In experiment, polyphenols were extracted by reflux ectraction method which applyed petroleum ether to degrease and methyl alcohol solvent. Phenolic hydroxyl were examined and inspected by colour-developing reaction and the content of total polyphenols was determined by UV-spectrophotometry. Screening test were performed to the antifungal activities of polyphenol extraction by the tube dilution method to the selected ten pathogenic fungus such as Dothiorella gregaria, Rhizoctonia solani, Phyllosticta pirina, and the minimal inhibitory concentration were measured. The column chromatography and thin layer chromatography were applyed to separate and analyse cortex extracts of Dracaena cochinchinensi Lour.

实验部分采用以石油醚脱脂,甲醇为溶剂的回流提取法来提取植物多酚,用显色反应检识酚羟基;采用紫外分光光度法对多酚粗体物进行总多酚含量的测定;选取了聚生小穴壳菌、立枯丝核菌、梨叶点霉等10株常见农林业致病真菌,采用试管液基稀释法对多酚粗提取物进行了抗真菌活性筛选试验,并测定其最低抑菌浓度;采用柱层析法和薄层层析法对其中抑菌效果较好的龙血竭进行分离分析,根据其中3种化合物的光谱数据UV、IR、~(13C-NMR、1H-NMR和MS鉴定其结构。

In this subject we maked Hypnum hamulosum and Thuidium cymbifolium as objects to monitor the air pollution of heavy metal and SO2 of Nanjing city using moss bags,combined simulated test and monitoring of natural pollution to discuss the mechanism of mosses to be used as monitor of air pollution of heavy metals.

本课题以弯叶灰藓和大羽藓为研究对象,采用苔袋法对南京地区的大气重金属和SO2污染进行了监测,通过室内模拟培养与室外自然污染监测相结合的方法,对树木附生藓类监测大气重金属污染机理作了初步的探讨。

Leaves. Result: Extraction temperature had effect on total flavonoids yield, and ethanol concentration had more obvious effect than extraction temperature. The more natural storage time, the less total flavonoids content, and the average descent rate was 24.74% per year. The flavonoids content from Lithocarpus polystachyus Rehd. gathered between August and October was the highest. The total flavonoids content was higher in the new leaves of Lithocarpus polystachyus Rehd.

结果:乙醇体积分数对总黄酮提取量有显著影响,提取温度对总黄酮提取量有影响;多穗柯自然存放时间越长,总黄酮含量越低,平均每年下降24.74%;不同季节采摘的多穗柯其总黄酮含量以8~10月最高;经对怀化多穗柯嫩叶和老叶中总黄酮的提取测定表明,多穗柯中嫩叶总黄酮含量最高,二年生最低。

Control effects of the seedlings, whorl leaves and the leaves of transgenic Bacillus thuringiensis corn on the 1 st instar, 4th instar and 5th instar larvae of Mythimna separata were evaluated in laboratory.

在室内用生测法研究了表达Cry1Ab杀虫蛋白的Bt玉米MON810和Bt11小苗和心叶对粘虫Mythimna separata初孵幼虫以及玉米叶片对暴食期4龄和5龄幼虫的杀虫效果。

Control effects of the seedlings,whorl leaves and the leaves of transgenic Bacillus thuringien- sis corn on the 1st instar,4th instar and 5th instar larvae of Mythimna separata were evaluated in laboratory.

在室内用生测法研究了表达Cry1Ab杀虫蛋白的Bt玉米MON810和Bt11小苗和心叶对粘虫Mythimna separata初孵幼虫以及玉米叶片对暴食期4龄和5龄幼虫的杀虫效果。

On the basis of ecologic balance, developing the complex biological preparation as a goal, we first explored two compatibly antagonists to control the leaf disease of forest plant and hoped this two antagonistic fungi could play a cooperative role in controlling the pine needle blight. The main research results were as follows: 1 , The dual test showed the two antagonistic fungi(Gliocladiutm virens ,Bacillus firmus)had some differences to Pestalotia funerea in the inhibition mode. The role of G virens to the P.funerea, mainly displayed the competition in the nutrition and space, but the B. firmus had the distinct inhibition zone to the P.

本研究以生态平衡为理论基础,开发复合生物制剂为目标,首次将两种亲和拮抗菌用于森林植物叶部病害,以期两种复合拮抗菌在松属植物赤枯病防治中发挥协同作用,其主要研究结果如下: 1、对峙培养显示两种颉抗菌(Gliocladium virens、Bacillus firmus)对赤枯病菌的抗生方式有一些差异。G.virens对P.funerea的作用,主要表现为营养与空间上的竞争,无抑菌圈;而B.firmus对P.funerea有明显的抑菌圈(平均6mm),对峙培养4-5d后菌丝逐稀疏、干枯、变黄。

Before further interpreting and justifying the substance of Shakespearean tragedies, I make a brief review of the major visions on death in Chinese and Western thoughts; the Freudian concepts of Eros and the death instinct are also induced in this chapter as a theoretical device to enter the discussion of the theme of death.Chapter Two attempts to solve the question ofIs it the denial of death or

论述了五部悲剧中种种情形复杂的&爱&是如何惊人地与潜伏在悲剧人物下意识中的&死亡本能&联系在一起的,有哈姆雷特因&俄狄浦斯情结&而对奥菲里亚所产生的扭曲却强烈的爱;有奥赛罗对德斯底蒙娜由爱而生痛惜、嫉妒而最终走向&执行正义&的爱;有李尔王对小女儿考地利亚超越父女之情的爱,有安东尼和克利欧佩特拉由性爱而转变、升华的精神之爱,有罗密欧与朱丽叶富有浪

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