A closed-loop photosynthesis system and a heat-balance sap-flow gauge independently confirmed oscillatory transpiration in a greenhouse-grown Rosa hybrida L. Repetitive sampling revealed 60-minute synchronized oscillations in CO2-exchange rate, stomatal conductance, and whole-plant sap-flow rate. To avoid confusing cyclical plant responses with random noise in measurement, we suggest that gas-exchange protocols begin with frequent, repetitive measurements to determine whether transpiration is stable or oscillating. Single measurements of individual plants would be justified only when transpiration is steady state.
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Jackson, Phillip
Basnayake, Jaya
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Sugar Res Australia Ltd, POB 117, Ayr, Qld 4807, AustraliaCSIRO, Australian Trop Sci Innovat Precinct, Private Mail Bag PO, Aitkenvale, Qld 4814, Australia
Basnayake, Jaya
Inman-Bamber, Geoff
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Crop Sci Consulting, 33 Tamarind St, Kirwin, Qld 4817, AustraliaCSIRO, Australian Trop Sci Innovat Precinct, Private Mail Bag PO, Aitkenvale, Qld 4814, Australia
Inman-Bamber, Geoff
Lakshmanan, Prakash
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Sugar Res Australia Ltd, 50 Meiers Rd, Indooroopilly, Qld 4068, AustraliaCSIRO, Australian Trop Sci Innovat Precinct, Private Mail Bag PO, Aitkenvale, Qld 4814, Australia
Lakshmanan, Prakash
Natarajan, Sijesh
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Sugar Res Australia Ltd, POB 117, Ayr, Qld 4807, AustraliaCSIRO, Australian Trop Sci Innovat Precinct, Private Mail Bag PO, Aitkenvale, Qld 4814, Australia
Natarajan, Sijesh
Stokes, Chris
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