REU: Systematic Study of Chusquea subg. Rettbergia (Poaceae: Bambusoideae) in Brazil

REU：Chusquea subg 的系统研究。

• 批准号: 8906340
• 负责人: Lynn Clark
• 金额: $ 9.3万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-10-15 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8906340&HistoricalAwards=false
• 关键词: REU; Systematic; Study; Chusquea; subg.

Bamboos, often known as the tree grasses, are an ecologically and economically important group of primarily tropical plants. The tall, graceful plume-like stems of bamboo are a familiar element of any tropical scene, but bamboos are actually very diverse in size, form, and habitat. In addition to the typical "giant" bamboos, some species are very grass-like with relatively soft stems, while others are vines or shrubs. Many bamboos grow in or near the tropical lowland forest, but many species can be found in high montane forests, with some species occurring at high elevations on windswept ridges. Some hardy bamboos grow in the temperate zone and can survive frost and snow. Although there are approximately 1000 species of bamboos in the world, most have not been studied intensively because of their size and the difficulty in collecting them. Dr. Lynn Clark of Iowa State University will study a group of 30 or so species of viny bamboos native to South America, mostly in Brazil. Although these species have little current economic use, they are common in the lower montane forests of eastern Brazil and are ecologically important. The first step will be the observation and collection of these plants in the field, aided by collaborating Brazilian students and researchers. Pressed and dried specimens, and leaves and flowers preserved in liquid, will be taken back to the laboratory for the second step, involving detailed comparative studies of morphology, cytology, and anatomy. Once the data are assembled, a complete description of each species will be prepared, along with geographical distribution data and notes on habitat and flowering and fruiting behavior. The third step of the study involves a higher level of analysis, in which the evolutionary relationships among these bamboo species are explored by searching for consistent patterns of unique biological similarities. The results of this project will have application for those interested in the inventory, conservation, and ecology of native American bamboos, the economic potential of bamboos, and the diversity and evolution of grasses.

竹子，通常被称为树草，是生态和经济上重要的一类主要热带植物。 高大、优美、羽毛状的竹茎是任何热带景观中常见的元素，但竹子实际上在大小、形状和栖息地方面非常多样化。 除了典型的“巨型”竹子外，有些种类非常像草，茎相对柔软，而另一些种类则为藤本植物或灌木。 许多竹子生长在热带低地森林中或附近，但许多物种可以在高山森林中发现，其中一些物种出现在高海拔的风吹山脊上。 一些耐寒的竹子生长在温带地区，可以忍受霜冻和雪。 尽管世界上大约有 1000 种竹子，但大多数竹子由于其体积大且采集难度大而尚未得到深入研究。 爱荷华州立大学的林恩·克拉克 (Lynn Clark) 博士将研究 30 种左右的藤竹，它们原产于南美洲，其中大部分位于巴西。 尽管这些物种目前几乎没有经济用途，但它们在巴西东部的低山森林中很常见，并且具有重要的生态意义。 第一步将是在巴西学生和研究人员合作的帮助下，在实地观察和收集这些植物。 压制和干燥的标本以及保存在液体中的叶子和花朵将被带回实验室进行第二步，包括形态学、细胞学和解剖学的详细比较研究。 收集数据后，将准备每个物种的完整描述，以及地理分布数据和栖息地以及开花和结果行为的注释。 研究的第三步涉及更高层次的分析，通过寻找独特生物相似性的一致模式来探索这些竹种之间的进化关系。 该项目的结果将适用于那些对美国本土竹子的库存、保护和生态、竹子的经济潜力以及草的多样性和进化感兴趣的人。