Growth and Physiological Response of Creeping Bentgrass To Elevated Night Temperature

in HortScience
Authors: Jinmin Fu1 and Bingru Huang2
View More View Less
  • 1 Department of Horticulture, Forestry, and Recreation Resources, Kansas State University, Manhattan, KS66506-5506
  • | 2 Department of Plant Biology and Plant Pathology, Rutgers University, New Brunswick, NJ 08901

Growth of cool-season grasses declines with increasing temperatures. The objective of this study was to determine the effects of elevated night temperature on turf quality, root mortality, and carbohydrate metabolism in creeping bentgrass (Agrostis stoloniferous L. var. palustris (Huds.) Farw (syn. A. palustris Huds.). Plants of `Penncross' were exposed to two night temperature regimes: 24 °C (higher night temperature); and 19 °C (lower temperature control) under the same day temperature (24 °C) in growth chambers for 45 days. Prolonged exposure of plants to higher night temperature reduced turf quality, canopy photosynthetic rate, whole-plant and root respiration rates during the day, translocation of newly fixed 14C assimilate to roots, and total nonstructural carbohydrate content in shoots and roots (including dead and live roots). Elevated night temperature increased root mortality and whole-plant and root respiration rates at night. Our results indicated that a decline in turf quality and increase in root dieback with high night temperature was mainly associated with increased night respiration rates of whole plant and roots and reduced carbohydrate availability.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 126 18 1
PDF Downloads 97 40 7