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. 2024 Oct 28;13(21):3010. doi: 10.3390/plants13213010

Figure 4.

Figure 4

Flower development of P. berteroi in stems of A. trijuga, analyzed with LM (A–D,G), and CLSM for autofluorescence (E,F). (A,B,E,G) Cross-sections and (C,D,F) radial sections of infested A. trijuga stems. (A) Origin of the P. berteroi floral meristem from an EP (box); (B) Close-up of box in (A) showing the polarity of EP with vegetative and reproductive cells surrounded by collapsed host cells; (C) floral meristem; (D) meristem with first bract whorl; (E–G) P. berteroi staminate flowers at various stages of development, with some already emerging through the periderm of the stem of A. trijuga. Abbreviations: ch: collapsed host cells; co: cortex; cz: cambial zone; EP: endophytic patches; fb: floral bud; fm: floral meristem; pe: periderm; ph: phloem; rc: reproductive cells; sf: staminate flower; sk: sinker; vc: vegetative cells; xy: xylem. Scales: (A) 200 µm; (B) 20 µm; (C) 100 µm; (D,E) 200 µm; (F,G) 1 mm.