OSCILLATORY TRANSPIRATION MAY COMPLICATE STOMATAL CONDUCTANCE AND GAS-EXCHANGE MEASUREMENTS

被引：7
|
作者：
ROSE, MA
ROSE, MA
机构：
来源：
HORTSCIENCE | 1994年 / 29卷 / 06期
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.
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页码：693 / 694
页数：2
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