期刊
PLANT ECOLOGY
卷 151, 期 1, 页码 51-54出版社
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1026590506740
关键词
carbon balance; desiccation tolerance; rehydration
Air temperature and humidity, moss surface temperature, moss water content, and photosynthetically active radi ation were measured through a clear dry night and early morning in July 1998: CO2 gas exchange of the moss was measured by infra-red gas analysis. The measurements showed progressive absorption of water by the moss through much of the night. The moss reached sufficient water content for about 1.5 h of positive net CO2 uptake immediately after dawn. The cumulative net carbon balance on this occasion was negative, but mornings with heavier dew could give a positive daily carbon balance, and short, early morning periods of photosynthesis during prolonged dry weather may mitigate long-term desiccation damage and allow for regular molecular repair.
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