OSCILLATORY TRANSPIRATION MAY COMPLICATE STOMATAL CONDUCTANCE AND GAS-EXCHANGE MEASUREMENTS

被引:7
作者
ROSE, MA
ROSE, MA
机构
关键词
ROSA-HYBRIDA; PHOTOSYNTHESIS; SAP-FLOW GAUGE; STOMATAL CYCLING;
D O I
10.21273/HORTSCI.29.6.693
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
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.
引用
收藏
页码:693 / 694
页数:2
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