SGER: Potential Role of Ultraviolet Radiation in Tissue Injury of Columnar Cacti

SGER：紫外线辐射在柱状仙人掌组织损伤中的潜在作用

• 批准号: 9115774
• 负责人: Lance Evans
• 金额: $ 2.68万
• 依托单位: Manhattan College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-15 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115774&HistoricalAwards=false
• 关键词: SGER; Potential; Role; Ultraviolet; Radiation

Recent evidence shows that epidermal browning of tall- stemmed, long-lived cacti is related to total time of sun exposure. Epidermal browning is much greater on the southern exposures of such cacti in the Northern Hemisphere and on northern exposures of similar species in the Southern Hemisphere. This surface browning leads to death of individual cacti. An evaluation of authentic photographs of saguaro cacti an Arizona for the past 90 years shows that epidermal browning has increased by about 4% per decade, the same percentage increase in ultraviolet (UV) radiation exposure in the United States over the past three decades. The increase in ultraviolet light exposure has been shown to be related to the depletion of the ozone layer in the stratosphere. The data base (473 cacti) of saguaros has been able to show the sequence of steps during epidermal browning. The purpose of the proposed research is to make the same series of phenological and physiological measurements on several species of cacti in Chile and Argentina, to determine if the sequence of steps of epidermal browning is similar to those of saguaros. If the sequence of steps is similar among all these cacti (both Northern and Southern hemispheres), the basis for further investigation of a possible mechanism for UV-indeed injury would be strengthened.

最近的证据表明，高，表皮布朗宁 有茎的长寿仙人掌与太阳的总时间有关 exposure. 表皮的布朗宁在南部的 这种仙人掌在北方半球和 南半球类似物种的北方暴露。 这种表面布朗宁导致个别仙人掌死亡。 一个 评价真实的照片的仙人掌亚利桑那州 在过去的90年里，表皮布朗宁 每十年增加约4%， 紫外线（UV）辐射暴露在美国超过 在过去三十年里 紫外线照射的增加 已被证明与臭氧层的消耗有关 在平流层。 仙人掌的数据库（473仙人掌） 能够显示出表皮生长过程中的步骤顺序 布朗宁。 拟议研究的目的是使 相同系列的物候和生理测量 智利和阿根廷的几种仙人掌，以确定 表皮布朗宁步骤的顺序类似于 关于Saguaros 如果所有这些步骤的顺序相似， 仙人掌（包括北方和南半球）， 进一步研究了紫外线确实 伤害将得到加强。