Browsing by Subject "shade"
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Item The effects of blue, green, and neutral density photoselective gels on the spectral quality of sunlight(2021) Petrella, Dominic P; Watkins, EricMany researchers use neutral density black shade cloth to apply shade treatments that allow for the separation of confounding effects brought on by foliar shade (i.e. tree shade), such as water deficit due to competing vegetation, from plant responses to alterations in light quantity/quality. However, this black shade cloth does not alter spectral quality of sunlight like foliage does. Therefore, black shade cloths are not suitable for researchers looking to examine the effects altered spectral quality caused by foliar shade. Materials that selectively filter sunlight, like leaves, do exist and have been used to simulate foliar shade.Item Evaluating variation in shade tolerance among fine fescue species(2018-11) Petrella, Dominic; Watkins, EricTolerance to shade is a desired trait for cool-season turfgrasses, but improvement in shade tolerance has been challenging. Shade tolerant turfgrasses, when grown under quantitative and qualitative shade, should exhibit negligible etiolation, less chlorosis, and efficient carbohydrate partitioning, while maintaining normal amounts of tillering - therefore growing similar to full sun plants. Selection for shade tolerance in the field can be difficult due to large amounts of variation in shade intensity and the duration. The fine fescue (Festuca ssp.) turfgrasses are shade tolerant turfgrasses; however, there has been little investigation into the variability for shade tolerance within and among this turfgrass group. Our objective was to evaluate the use of a greenhouse-based approach for selecting of improved shade tolerance among the fine fescues.