These findings have been called into question in a 2007 paper which found "there is no evidence for substantial aerobic methane emission by terrestrial plants, maximally 0.3% of the previously published values".
Estes descubrimentos foron postos en cuestión nunha publicación de 2007 que atopou que "non hai evidencia dunha emisión de metano aeróbica substancial polas plantas terrestres, que como moito é o 0,3% dos valores que previamente se publicaron".