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. 2022 Oct 5;13:981884. doi: 10.3389/fpls.2022.981884

FIGURE 2.

FIGURE 2

Longitudinal (A,B,E–H) and transversal (C,D) sections of developing (A,B,H) and mature seeds (C–G) of Eugenia longipedunculata (A,E,G), E. paracatuana (B), E. gracillima (C,D), E. involucrata (F) and E. pyriformis (H). (A) General aspect. Note the non-linear micropylar channel, the nuclear endosperm, the remains of the nucellus, the anticlinal divisions (▶) in the anti-raphe and the limit of the pachychalaza (*). (B) Detail evidencing the hypostase, proliferating nucellus, radially elongated exotestal and endotestal cells and mesotesta with divisions in various planes. (C,D) Detail showing the perichalazal integument. (E,F) General aspect of the markedly campylotropous seed. Note the eugenioid embryo occupying the seed cavity and the limit of the pachychalaza (*). (G) Detail of the micropylar region. (H) Detail evidencing the multiplicative tegmen and exotesta constituted by radially elongated cells in vicinity of the micropyle. Eb, embryo; Et, endostome; En, nuclear endosperm; Es, endotesta; Ex, exotesta; Hy, hypostase; Hr, hypocotyl-radicle axis; Mc, micropylar channel; Ms, mesotesta; Np, nucellus proliferation; Nu, nucellus; Pr, pre-raphe; Pt, pachychalazal integument; Pz, perichalaza; Tg, tegmen; Tp, multiplicative tegmen; Ts, testa; Xt, exostome. Scale bars = 200 μm (A,B,E–H), 500 μm (C,D).