A 3-year study was conducted in Auburn, Ala., on an established hybrid bermudagrass [Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt-Davy `Tifway'] stand maintained at a 2.54-cm mowing height. Treatments were level of soil traffic applied via a weighted golf cart to produce turf and soil that received varying amounts of traffic. Dormant bermudagrass was overseeded with perennial ryegrass (Lolium perenne L.) each October, which remained until May of each year. Spectral data were collected monthly using a multispectral radiometer. Percent reflectance data were acquired over 512 discrete wavelengths in visible (VIS) and near-infrared (NIR) ranges. Quarterly data collection included soil penetrometer and bulk density measurements to a depth of 15 cm. After 2 years of traffic, both soil penetrometer and bulk density data indicated statistically significant increases in soil compaction. In general, as traffic increased there were also increases in percent reflectance in the VIS range. Data were subject to temporal variation, however, as values changed with the date of sample collection. The NIR reflectance data provided little consistent correlation to measurements of soil compaction. Use of NIR and VIS radiometry to evaluate turf stress showed some potential, but temporal variation must be considered.
E.A. Guertal and J.N. Shaw
Tammy Kohlleppel, Jennifer Campbell Bradley and Steve Jacob
Stress has been characterized as an epidemic and has been found to play an important role in causing many diseases. In contrast, people often seek out nature and green spaces to help cope with life stress. Botanic gardens provide opportunities for people to immerse in nature, explore their horticultural interests, and experience recreation and leisure. The literature suggests that all of these activities are effective coping strategies against life stress. This study explored the effectiveness of botanic garden visits as a coping strategy. The findings of this study suggest that botanic gardens could be a place for coping with the effects of stress. Botanic garden visitation, along with gender, stressful life events, perceived health, and selfesteem, was found to be important in explaining reported levels of depression. Data also showed that visitors who received the most benefit of stress reduction were those most needing a coping strategy.
Hussein Al-Amier, Robert Lussier, Ming Coler, Margaret Stoltzman and Lyle Craker
Poster Session 25—Stress Physiology 19 July 2005, 1:15–2:00 p.m. Poster Hall–Ballroom E/F
Astrid Newenhouse and Steve Wilson
192 ORAL SESSION (Abstr. 754-761) FRUIT CROPS: STRESS PHYSIOLOGY
George C.J. Fernandez
178 ORAL SESSION 54 (Abstr. 384–391) Cross-commodity: Stress Physiology
Ahmed A. Tawfik and Jiwan P. Palta
93 ORAL SESSION 25 (Abstr. 186–193) Vegetable Crops: Stress Physiology
Joel L. Shuman, Ron Mittler and Vladimir Shulaev
Poster Session 28—Stress Physiology 29 July 2006, 1:15–2:00 p.m.
Jack W. Buxton
78 WORKSHOP 10 (Abstr. 681) Options and Outlook for Managing Water Stress in Horticultural Crops: Key Questions Tuesday, 25 July, 8:00-10:00 a.m.
The nature of plant stress responses, particularly to water-limited conditions, is of fundamental interest to biologists because they are one of the most important adaptations of plant life to terrestrial existence. The study of such responses
E. Peterlunger and B. Marangoni
141 ORAL SESSION 42 (Abstr. 289–295) Small Fruits/Viticulture: Nutrition and Stress Physiology