The effect of root temperature on rose plants in relation to air temperature |
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Authors: | M Zeroni J Gale |
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Institution: | (1) The Jacob Blaustein Institute for Desert Research, Ben Gurion University of the Negev, 84990 Sede Boqer Campus, Israel |
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Abstract: | Rose plants (Rosa hybrida ‘Sonia’=‘Sweet Promise’) were grown in heated (minimum night temperature 17°C), and unheated greenhouses with or without
root heating to 21°C. These trials covered 6 growth cycles extending over two winter seasons. In the heated greenhouse, root
heating did not increase yield, flower quality or plant development. In the unheated greenhouse, root-heated plants grew as
well as those in the air-heated greenhouse as long as the air temperature did not fall below 6°C. When minimum night temperatures
fell below 6°C, growth, yield and quality were reduced, irrespective of root temperature.
Daytime plant water relations were studied in plants growing at 6 different root temperatures in the unheated greenhouse.
Leaf resistance to water diffusion was lowest at optimal root temperature. Total leaf water potential was not significantly
affected by root temperature. |
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Keywords: | air temperature development growth plant water relations root temperature Sonia roses yield |
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