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. 2019 Feb 26;20(5):1015. doi: 10.3390/ijms20051015

Figure 7.

Figure 7

The structural comparison of the anther and its appendage between N. nucifera (a,b) and N. lutea (c–k). (a) The morphology of the mature anther; the red line indicates the place for cross section. (b) Cross section of the anther appendage, the red arrow indicates the osmiophilic bodies accumulated with the multiple layers under the epidermis cells. (c) The morphology of the mature anther; the red line indicates the place for the cross section. (d) Cross section of the appendage, the arrows indicate the osmiophilic bodies randomly scattered in the parenchyma cells. (e–j) Transverse section of the anther appendage at the microspore mother cell stage (e), the tetrad stage (f), the early young microspore stage (g), the middle free spore stage (h), the late young microspore stage (i) and the mature stage (j). (k) The scanning electron micrograph of the surface structure of the anther appendage at the mature stage. (a,c) Bar = 1 cm; (b,d,g–j) Bar = 100 μm; (e,f) Bar = 20 μm; (k) Bar = 10 μm.