Limited transpiration under high vapor pressure deficits of creeping bentgrass by application of Daconil-Action®

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• 作者：Avat Shekoofa ; Pablo Rosas-Anderson ; Danesha S. Carley ; Thomas R. Sinclair…
• 关键词：Daconil action ; Creeping bentgrass ; Transpiration rate ; Vapor pressure deficit ; Water conservation
• 刊名：Planta
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：243
• 期：2
• 页码：421-427
• 全文大小：400 KB
• 参考文献：Beard JB, Kenna MP (2008) Water quality and quantity issues for turfgrasses in urban landscapes. Ames, CAST, p 298
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• 作者单位：Avat Shekoofa (1)
  Pablo Rosas-Anderson (1)
  Danesha S. Carley (1)
  Thomas R. Sinclair (1)
  Thomas W. Rufty (1)
  
  1. Department of Crop Science, North Carolina State University, Box 7620, Raleigh, NC, 27695-7620, USA
  
• 刊物主题：Plant Sciences; Agriculture; Ecology; Forestry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-2048

文摘

Main conclusion First observation that chemical spray can induce limited-transpiration rate under high vapor pressure deficit. It appears that acibenzolar may be key in inducing this water conservation trait. Irrigation and water use have become major issues in management of turfgrasses. Plant health products that have been introduced into the turfgrass market have been observed to improve plant performance in water stress conditions. In this study, we evaluated whether a selection of common plant health products alter the ability of creeping bentgrass (Agrostis stolonifera L.) to control transpiration under high vapor pressure deficit (VPD). The plant health treatments—Daconil Action®, Insignia®, and Signature®—were applied to plots on golf course putting greens located in Raleigh NC and in Scottsdale, AZ. Using intact cores removed from the putting greens, transpiration rates were measured over a range of VPDs in controlled conditions. In all cases stretching over a 3-year period, bentgrass cores from field plots treated with Daconil-Action limited transpiration under high VPD conditions, while check treatments with water, and others treated with Insignia® or Signature® did not. Transpiration control became engaged when VPDs reached values ranging from 1.39 to 2.50 kPa, and was not strongly influenced by the field temperature at which the bentgrass was growing. Because all plots in NC had been treated with chlorothalonil—the key ingredient in Daconil Action to control diseases—it was concluded that the likely chemical ingredient in Daconil Action triggering the transpiration control response was acibenzolar. This is the first evidence that the limited-transpiration trait can be induced by a chemical application, and it implies significant potential for ameliorating drought vulnerability in cool-season turfgrasses, and likely other plant species.