PT Journal AU Clair, B Déjardin, A Pilate, G Alméras, T TI Is the G-layer a tertiary cell wall? SO Frontiers in Plant Science PY 2018 BP 623 VL 9 DI 10.3389/fpls.2018.00623 DE Flax; G-layer; Gelatinous layer; Maturation stress; Secondary cell wall; Tension wood; Tertiary cell wall ER