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关键词： 实验   分子生物学   植物生理学  

ISBN: (纸本)13031·1084

摘要： 本书是植物生理学中分子生物学的最新实验技术。书中分为:酶学,酶的纯化,线粒体,光合作用,核苷酸,核酸的性质,脫氧核糖核酸,核糖核酸,蛋白质合成,植物激素,生物测定技术,用气相色谱法分析植物的成分等11部分,具体介绍了35个实验。

关键词： 乙烯   生长素   烯烃   调节控制   调控   2-氯乙基膦酸   植物生长调节物质   生物学作用   植物  

摘要： 乙烯是植物体内目前已知的五大类激素之一,对植物的生命活动有重大的调节作用。在我国自71年研制生产乙烯利以来(上海植物生理研究所激素研究室,1972),全国各地乙烯利的生产及应用都在不断扩大深入,结合我国农林业生产的具体实际,有些项目已在生产中发挥了重大作用,许多方面具有特色,体现了洋为中用,走我国自己发展的道路。同时为进一步深入开展理论研究提供了广泛而丰富的实践基础。乙烯作为植物生理学的研究对象,早在上世纪联系到空气污染问题就开始了,但公认为一种内源激素则是60年代中期的事。早在上半世纪研究照明气对植物生长发育各

关键词： Science   Humanities and Social Sciences   multidisciplinary  

摘要： SEASONAL thermal fronts which occur in coastal waters are typified by sharp lateral gradients of temperature at the sea surface resulting from a surface outcropping of the thermocline. The frontal regions are areas of considerable physical and biological activity; in the case of the fronts in the Celtic and Irish Seas this increase in biological activity is reflected in marked increases of chlorophyll a at the sea surface1. Considerable data on the spatial distribution of physical and chemical characteristics of the water and chlorophyll a concentrations in the vicinity of these and other fronts are now available2–5. But, few observations have been made either on the temporal variability of these characteristics or on the more detailed distribution of phytoplankton productivity. During a survey of the Celtic Sea in September 1976 we made consecutive crossings of the frontal region in order to investigate the small-scale distributions of chlorophyll a and primary productivity and their interrelationships with selected physical and chemical variables.

关键词： 瓣瓣   炎症   病理   XIV.163   OO   植物  

摘要： 本文报道了163种植物和/或真菌的抗炎作用的筛选结果。每种植物的药用部位经空气干燥,研成粗粉,以乙醇渗漉,低温(<45℃)减压下回收乙醇,提取物以石油醚脱色,并用空气流将石油醚驱净。实验时将提取物溶于盐水或悬浮在5％阿拉伯胶中,于注射角义菜胶150和30分钟前分别给药一次,对照组则分别接受2次等体积溶剂。足肿胀的形成系按稍加修改的Winter法。将0.1毫升1%的角义菜胶(用0.9％NaCl配

关键词： Reproductive Effort   Reproductive Biology   Life History Strategy   Female Gamete   Hermaphrodite Flower  

摘要： The life cycles, programme of energy expenditure and allocation to reproduction, and the reproductive efforts of three wild Allium species, i.e., A. Victorialis ssp. platyphyllum, A. monanthum, and A. Grayi, all native to Japan, were studied and compared. Furthermore, their adaptive strategies were discussed from the point of view of life history strategy. First, the reproductive systems, number of male and female gametes borne, and the number and size of propagules produced were critically investigated. In order to estimate the crude reproductive efficiency (sensu Harper and Ogden, 1970) of these species, sequential harvests were taken and the plants were divided into their component structures, dried and weighed. The quantity of dry weight allocated to sexual or vegetative reproduction was obtained by weighing the seeds, bulbils, or bulblets produced at the end of the season. A. Victorialis ssp. platyphyllum showed a rather low reproductive effort. However, the mean seed output per plant was 34.8±16.8 and the productivity appeared very constant every season. Thus, in the natural populations young plants are borne and recruited every season by means of sexual reproduction. A. monanthum was found to be characterized by annual type dry matter economy. The sexuality and reproductive systems of this species turned out to be extremely complex, and ten different reproductive types were distinguished. The exceedingly low efficiency of sexual reproduction in this species is apparently supplemented by vegetative propagation. The dry matter allocation to daughter bulbs at final harvest was very high;whereas the allocation to sexual reproduction was extremely low. In A. Grayi (a polyploid complex of 4X, 5X, and 6X), a surprisingly high amount of the total annual net assimilate is allocated to the bulbils and bulblets. On the other hand, sexual reproductive effort in this species is exceedingly low, even in obligate amphimictic plants. Thus, the recruitment of individuals in a