[Study of the behavior of the vegetative meristem of alfa (Stipa tenacissima L.). Cytological and histological approaches].
The biological and cytological studies of the vegetative meristem of Stipa tenacissima L. gave clear indication about its structure. It was similar to what was previously described in several species. This meristem showed an axial apical zone constituted by sommital cells of both tunica and corpus, a sub-apical lateral zone, very chromophilous, representing the initial ring and a medullar meristem. The cytofluorimetric determination of DNA in interphasic nuclei of these three zones revealed that the nuclei of the apical and lateral zones were in S phase, announcing the beginning of mitosis and meaning that these zones were the centers of the foliar initiation. The medullar meristem was in dormancy: all the nuclei were in G1 phase.
Mehdadi
Z
Z
Laboratoire de Biologie des Organismes et des Populations, Institut des Sciences de la Nature, Université Djillali Liabès de Sidi Bel Abbès, 22000, Algérie.
Benaouda
Z
Z
Bouchaour
I
I
Moulessehoul
S
S
Joseph
M
M
Delcourt
A
A
D018744:DNA, Plant / Q000032:analysis; D006651:Histocytochemistry / Q000379:methods; D007399:Interphase; D018519:Meristem / Q000166:cytology* / Q000502:physiology*; D006109:Poaceae / Q000166:cytology* / Q000502:physiology*
D018744:DNA, Plant