Journal Article 2 142M471B3J 1 7440-44-0 1 9004-34-6 1 C4 plants 1 Carbon 1 Carbon Dioxide 1 plus ... Carbon Isotopes 1 Carbon export 1 Cellulose 1 Research Support, Non-U.S. Gov't 1 boreal forests 1 cellulose 1 high‐resolution dendrochronology 1 needle sugars 1 phloem sugars 1 photosynthesis 1 post-photosynthetic fractionation 1 post‐photosynthetic fractionation 1 proxy records 1 respiration 1 sink–source relation 1 stable isotopes 1 water use efficiency 1 moins ...