Effect
Increased heat stress tolerance
Macro-Sorb Foliar treated Perennial Ryegrass, cv. Commander/Edge/Citation, grown in heat stress conditions (36 °C) had a 5.1 % higher photochemical efficiency (sign), less polyphenols and significant less leaf electrolyte leakage compared to the untreated control. Macro-Sorb Foliar didn't have significant effects on the perennial ryegrass placed under optimal conditions and mild heat stress (28 °C) conditions.
Trial details
indoor, growth chamber, 10.16 cm pots filled with washed sand, 3 temperature conditions: optimal (20 °C) and heat stress (28 and 36 °C)
USA
Crop
Ryegrass, Lolium perenne
Trial application
Method
Foliar spray
Timing
First application 1 month before start of heat stress, followed by treatments with a 3-days interval till the end of the experiment
Rate
0.64 mL/m2
2007
Effects of a Biostimulant on the Heat Tolerance Associated with Photosynthetic Capacity, Membrane Thermostability, and Polyphenol Production of Perennial Ryegrass
Crop Science
47
261-267
Crop group
