The Timing of Drought: Effects on Water Relations of Himalayan Tree Species, Award in U.S. and Indian Currencies

9312052佐贝尔描述：该项目资助俄勒冈州立大学科瓦利斯分校的唐纳德·佐贝尔博士和印度奈尼特库曼大学的S·P·辛格博士合作研究喜马拉雅树种在不同条件下的水分胁迫。这项研究有三个目标：确定印度喜马拉雅中部库曼的森林类型按水分胁迫程度和季节模式区分的程度；确定库曼森林中林木对干旱的适应机制；通过提供很少被研究的气候中的森林数据，以及通过在不同气候下工作的科学家之间的信息交流，提高对林木水分关系在林木生理生态中的地位的一般认识。将测量从海拔1000-2200米的各种森林类型的早晨水分胁迫的程度，以及水势的成分和气孔开放的程度，在雨季开始之前的叶片发育期间，对于雨季的成熟叶片，以及秋季和冬季的干燥季节的成熟叶片。范围：该项目补充了世界其他地区正在进行的关于不同气候的研究，并为夏季潮湿、冬季干燥的温带地区提供了没有的信息，对于消除适应可用水模式的区域偏见是必要的。这项工作需要美国和印度科学家的密切合作和分工。它符合此协作的目标。***

9312052 Zobel Description: This project supports travel and field expenses for Dr. Donald Zobel of Oregon State University, Corvallis, OR and Dr. S. P. Singh of Kumaun University, Nainital, India, to collaborate in a project to study the moisture stress in Himalayan tree species under various conditions. The study has three goals: to determine the degree to which forest types in Kumaun, in the Indian central Himalaya are differentiated by their degree and seasonal pattern of moisture stress; to determine mechanism of adaptation to drought by forest trees in Kumaun forests, and; to improve general understanding of the place of water relations in physiological ecology of forest trees, by providing data from forests in a climate seldom studied, and through exchange of information among scientists working in different climates. Measurements will be made of the degree of morning moisture stress across a range of forest types from 1000-2200 m elevation, and of the components of water potential and the degree of stomatal opening, during leaf development before the wet season begins, for mature leaves during the wet season, and for mature leaves during the dry season in fall and winter. Scope: This project complements research being made in other parts in the world on different climates, and provides information, not available, for temperate areas with a wet- summer, dry winter climate, and is necessary to eliminate the regional bias in models of adaptation to water availability. The work involves close collaboration, and division of work by the U.S. and the Indian scientists. It meets the objectives of this collaboration. ***