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关键词： caged probes   cell biology (plants)   confocal microscopy   green fluorescent protein   laser tweezers   light microscopy, ratio imaging   signal transduction  

摘要： The highly regulated structural components of the plant cell form the basis of its function. It is becoming increasingly recognized that cellular components are ordered into regulatory units ranging from the multienzyme complexes that allow metabolic channeling during primary metabolism to the "transducon" complexes of signal transduction elements that allow for the highly efficient transfer of information within the cell. Against this structural background the highly dynamic processes regulating cell function are played out. Recent technological advances in three areas have driven our understanding of the complexities of the structural and functional dynamics of the plant cell. First, microscope and digital camera technology has seen not only improvements in the resolution of the optics and sensitivity of detectors, but also the development of novel microscopy applications such as confocal and multiphoton microscopy. These technologies are allowing cell biologists to image the dynamics of living cells with unparalleled three-dimensional resolution. The second advance has been in the availability of increasingly powerful and affordable computers. The computer control/analysis required for many of the new microscopy techniques was simply unavailable until recently. Third, there have been dramatic advances in the available probes to use with these new microscopy approaches. Thus the plant cell biologist now has available a vast array of fluorescent probes that will report cell parameters as diverse as the pH of the cytosol, the oxygen level in a tissue, or the dynamics of the cytoskeleton. The combination of these new approaches has led to an increasingly detailed picture of how plant cells regulate their activities.

关键词： Animals   Biology   Computer Assisted Instruction   Computer Software   Females   Foreign Countries   Plants (Botany)   Reproduction (Biology)   Science Education   Student Attitudes   Teaching MethodsJamaicaJamaica  

摘要： This study investigated whether the use of the combination of the lecture, discussion and computer-assisted instruction (CAI) significantly improved the experimental students' attitudes to biology and the computer/CAI and their understanding of reproduction in plants and animals. The sample comprised 77 Jamaican grade 11 female students from two traditional high schools in Kingston. Attitudes to a biology questionnaire, attitudes to the computer/CAI questionnaire and a biology achievement test (BAT) were used for data collection. The results indicated that the experimental subjects' post-test attitudes to biology and the computer/CAI were significantly better than those of the control group subjects taught with the lecture and discussion methods;the experimental subjects significantly outscored the control group subjects on the post-test BAT;there were significant differences in their post-test BAT means based on their attitudes to biology in favour of experimental subjects with highly favourable attitudes to biology, but there were no significant differences in their means attributable to their post-test attitudes to the computer/CAI;there was a positive statistically significant but weak relationship between the experimental subjects' post-test attitudes to biology and their post-test BAT scores. © 2000, Taylor & Francis Group, LLC.

关键词： 中国   学术会议   信号转导   发育分子生物学   植物学  

关键词： 生物教学   教具   盆栽植物   教学实习   能力培养  

摘要： 在生物学教学中的直观教具目前仍以挂图、模型为主.挂图、模型的使用,确实能使教学内容具体化、形象化,但也不乏呆板.以盆栽植物为教具,可以利用学生的视、触、嗅多种感官,使学生产生活泼、自然的综合感觉.利用一件教具可以进行生物学多种内容的教学,同时,盆栽植物取材广泛、种类多样,受地域、气候的限制不大,易搬动,易陈列,可以常对学生形成刺激,强化学生记忆,有利于知识的巩固与积累.长期使用对于学生兴趣的激发、基础知识的学习、技能的形成、能力的培养很有好处.

关键词： 生物学效应   耐性机制  

摘要： 自50年代日本出现"水俣病"、"骨痛病",并且查明这些病分别是由汞(Hg)、镉(Cd)引起的公害以后,人们便对重金属污染予以高度重视.迄今为止,已对数种重金属污染的毒害作用、消除方法、污染监测进行了较为详尽的研究.进入土壤、水体、大气中的重金属在植物的根、茎、叶及籽粒中大量积累,不仅严重影响植物的生长、发育,而且还会进入食物链,危及人类健康.本文就Cd这一重金属的化学行为特性、生物学效应、及植物的耐性机制作一介绍.

关键词： Brassica rapa   Brassica oleracea   fast plants   rapid-cycling   model  

摘要： Rapid-cycling Brassica populations were initially developed as a model for probing the genetic basis of plant disease. Paul Williams and co-workers selected accessions of the six main species for short time to flower and rapid seed maturation. Over multiple generations of breeding and selection, rapid-cycling populations of each of the six species were developed. Because of their close relationship with economically important Brassica species, rapid-cycling Brassica populations, especially those of B. rapa (RCBr) and B. oleracea, have seen wide application in plant and crop physiology investigations. Adding to the popularity of these small, short-lived plants for research applications is their extensive use in K-12 education and outreach.

关键词： 植物学   生物学   实验  

ISBN: (纸本)7560415172

摘要： 本书分为：植物生物学实验指导(包括十八个实验)；植物生物学教学实习(包括藻类植物实习、地衣植物实习等六章)和旬阳坝植被三篇。

关键词： forest genetics   tree physiology   genomics  

摘要： Forest trees have tremendous economic and ecological value, as well as unique biological properties of basic scientific interest. The inherent difficulties of experimenting on very large long-lived organisms motivates the development of a model system fur forest trees. Populus (poplars, cottonwoods, aspens) has several advantages as a model system, including rapid growth, prolific sexual reproduction, ease of cloning, small genome, facile transgenesis, and tight coupling between physiological traits and biomass productivity. A combination of genetics and physiology is being used to understand the detailed mechanisms of forest tree growth and development.