The above-belowground coupling of the C cycle: fast and slow mechanisms of C transfer for root and rhizomicrobial respiration
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- 作者：Olga Gavrichkova ; Yakov Kuzyakov
- 关键词：Key wordsPhloem transport ; Photosynthesis ; Pressure/concentration waves ; Rhizosphere ; Soil respiration ; Time lag
- 刊名：Plant and Soil
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：410
- 期：1-2
- 页码：73-85
- 全文大小：
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Plant Sciences; Soil Science & Conservation; Plant Physiology; Ecology;
- 出版者：Springer International Publishing
- ISSN：1573-5036
- 卷排序：410
文摘
Background and aimsThe coupling of photosynthesis with belowground processes appears to be much faster than the time needed for assimilate translocation with the phloem flow. Pressure/concentration waves have been hypothesized to release belowground C already present in the phloem, resulting in a very fast feedback of rhizosphere processes to photosynthesis changes. We evaluate the speed of aboveground-rhizosphere coupling under maize by two mechanisms: pressure/concentration waves and direct phloem transport.