Abstract
The water-deficit stress of plants or crops is managed using plant temperatures to maximize product quality. The temperature of the target plant is repeatedly measured over a period of interest, and after each measurement, the plant temperature is compared with a predetermined plant setpoint temperature associated with a desired water-deficit stress level, above which temperature the plant is deemed to be in an undesired metabolic state. If the measured plant temperature is greater than the setpoint temperature, and humidity is not restrictive to plant cooling, then irrigation can be triggered to retain the plant within the desired stressed level, as determined by the temperature of the plant. By this method, irrigation can be withheld to increase plant temperature or applied to reduce plant temperature. The temperature of the plant is thus continuously increased and decreased relative to a desired temperature value that is indicative of a desired water-deficit stress.
Highlights
Plants, as sedentary poikilotherms, are subject to thermal variation
Irrigation controlled by the canopy temperature stress management system resulted in the application of less water than would be applied over the same period using the standard fixed-volume application at a set time interval
The results indicate that a canopy temperature threshold-based irrigation system that uses plant transpiration as the sensor of water status provides a mechanism for managing plant water status
Summary
As sedentary poikilotherms, are subject to thermal variation. Environmental temperatures vary accordingHow to cite this paper: Mahan, J.R. and Burke, J.J. (2015) Active Management of Plant Canopy Temperature as a Tool for Modifying Plant Metabolic Activity. As sedentary poikilotherms, are subject to thermal variation. How to cite this paper: Mahan, J.R. and Burke, J.J. (2015) Active Management of Plant Canopy Temperature as a Tool for Modifying Plant Metabolic Activity. American Journal of Plant Sciences, 6, 249-259. Burke to both diurnal and seasonal patterns. The thermal environment of many temperate plants is bounded by lethally low temperatures that define their growing seasons. Within the non-lethal thermal range, the plant is subjected to a continuously variable thermal environment. Temperature plays an important role in the plant environment interactions and is perhaps one of the most pervasive effectors of plant growth and development. The relationships between organisms and their thermal environments have been thoroughly summarized by Hochachka and Somero [1]
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