The 18 O‐signal transfer from water vapour to leaf water and assimilates varies among plant species and growth forms
Résumé
MRT Sugars was shorter in C 3 and C 4 plants than in crassulacean acid metabolism (CAM) plants and highly variable among species and growth forms; MRT Sugars was shortest for grasses and aquatic plants, intermediate for broadleaf trees, shrubs, and herbs, and longest for conifers, epiphytes, and succulents. Sucrose was more sensitive to δ 18 O V variations than other assimilates. Our comprehensive study shows that plant species and growth forms vary strongly in their sensitivity to δ 18 O V variations, which is important for the interpretation of δ 18 O values in plant organic material and compounds and thus for the reconstruction of climatic conditions and plant functional responses
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