Fig. 4
From: Growth phenology in Pinus halepensis Mill.: apical shoot bud content and shoot elongation
Seasonal variations in bud content. Photomicrographs of the development of the bud apex at different stages of differentiation: cataphyll primordia of the third growth unit (GU3 CP) and embryonic auxyblast of the second growth unit (GU2 EA); cataphyll primordia of fourth growth uunit (GU4 CP), embryonic auxiblast of the third growth unit (GU3 EA) and embryonic brachyblast (GU3 EB); cataphyll primordia of first growth unit (GU1 CP); axillary meristem of the second growth unit (GU2 AM); axillary meristem of the second growth unit (GU2 AM) and embryonic auxiblasts of first growth unit (GU1 EA); axillary meristem of the second growth unit (GU2 AM) and embryonic brachyblast of second growth unit (GU2 EB); cataphyll primordia of fourth growth unit (GU4 CP) and axillary meristem of the third growth unit (GU3 AM). The scale of photomicrographs is 8 mm = 100 μm