694 PB 270 DESICCATION AVOIDANCE OF APPLE TREES WITH N-2001 ANTITRANSPIRANT

in HortScience
View More View Less
  • 1 Department of Horticulture, Oregon State University, ALS 4017, Corvallis, OR 97331-7304
  • | 2 Great Lakes Chemical Corp., P.O. Box 2200, West Lafayette, IN 47906

Antitranspirant N-2001 (10%), Great Lakes Chemical Corporation, was applied as a soil drench to `Fuji'/EMLA7' apple plants growing in 15 cm pots in a 25/22±3°C (D/N) greenhouse. After bringing pots to field capacity, chemical application was made and water was withheld thereafter. One hour after chemical application, stomatal conductance of treated and control plants was 0.25 and 0.70 cm/sec, respectively. Stomatal conductance of treated plants was maintained at approximately 0.25 cm/sec throughout the test period (28 days). Stomatal conductance of the control plants decreased to 0.25 cm/sec 13 days after treatment due to desiccation. The stem xylem water potential of the treated and control plants was -2.0 and -5.5 MPa, respectively, 28 days after treatment. The relative water content of leaves of treated plants was 45% greater than controls. The average loss of water via transpiration of treated plants was 32% less than the control plants.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 31 7 1
PDF Downloads 65 28 1