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Figure 4.9: Tissues of the one year old ovular complex in Prumnopitys taxifolia.An ovular complex of at least 3.5 mm diam. and over 6 mm long including nipple(removed to f<strong>ac</strong>ilitate fixation), in median LS.The female gametophyte (fg) (albeit collapsed in this specimen) is now fully cellular, andarchegonia (A) are about half of their mature length. The tissues in centripetal order are:outer epimatium comprising epidermis (ep), hypodermis (hyp), mesophyll (me); innerepimatium comprising a broad layer of pale cells with scattered tanniniferous cells (tnc),which become more concentrated at the irregular epimatium/integument boundary (eib),vascular bundles (vb) and secretory canals (sc),The integument (i) is relatively featureless except for the dehiscence zone (dz). ln thenucellus, the parietal layers (pl) of the sporangial wall are becoming compressed, whilethe nucellus cone (nuc) retains its form. The cellular gametophyte has a prominentgynospore wall (gw) and two archegonia about 450 pm long (see Fig.4.17 F to L fordetails). Scale bar = 500 pm.
Fig. 4.9
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E vte*tJ(!rsHl.q"*$tBgHfrrsgJ{.ji .
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o P. taxifoliao P. ferruginea_ 5-.
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FFig.3.1
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Fig. 3.2
Page 11 and 12: [..#Hll,';',i. IFig. 3.3
Page 13 and 14: Fig. 3.4
Page 15 and 16: .'TA,{-t,I-t-_--lr:Tfii: i, 1,..1;1
Page 17 and 18: Fig. 3.6
Page 20 and 21: Figure 3.8: Sporangial wall of the
Page 22 and 23: Figure 3.9: (Prumnopitys taxifolial
Page 24 and 25: Figure 3.10: Development of the mic
Page 26 and 27: Figure 3.1 1: (Prumnopitys taxifoli
Page 28 and 29: Figure 3.12: Germination of the mic
Page 30 and 31: Figure 3.13: The exine, intine and
Page 32 and 33: Figure 3.14: Cellular and free-nucl
Page 34 and 35: Figure 3.15: Germinated pollen grai
Page 36 and 37: Figure 3.16: Development of the mal
Page 38 and 39: Figure 3.17: Pollen tube and body c
Page 40 and 41: Figure 3.18: The body cell nucleus
Page 42 and 43: Figure 3.19: Targetting of archegon
Page 44 and 45: Figure 3.20: The male gametes in Pr
Page 46 and 47: Figure 4.1: Morphology and developm
Page 48 and 49: Figure 42 : Earl development of tlt
Page 50 and 51: Figure 4.3 : Initiation of fertile
Page 52 and 53: Figure 4.4 : The ovular complex at
Page 54 and 55: Figure 4.5: (Prumnopitys taxifolial
Page 56 and 57: Figure 4.6:The nucellus cone before
Page 58 and 59: Figure 4.7: Post-pollination develo
Page 60 and 61: Figure 4.8: Transverse sections of
Page 64 and 65: Figure 4.10: (Prumnopitys taxifolia
Page 68 and 69: Figure 4.12: Development of the meg
Page 70 and 71: Figure 4.13: Megaspore tetrads in P
Page 72 and 73: Figure 4.14: Development of the fem
Page 76 and 77: Figure 4.16: Occasionally two or ev
Page 78 and 79: Figure 4.17: ln Prumnopitys taxifol
Page 80 and 81: Figure 4.18: Features of the centra
Page 82 and 83: Figure 4.19: Characteristics of the
Page 84 and 85: Figure 4.20: The archegonium reache
Page 86 and 87: Figure 4.21: The developing central
Page 92 and 93: Figure 4.24: Stages in the maturati
Page 94 and 95: Figure 4.25: Volumes of thirty-thre
Page 100 and 101: Figure 4.28: Up to four archegonia
Page 102 and 103: Figure 4.29: The cell wall of the m
Page 104 and 105: Figure 4.30: Some characteristics o
Page 106 and 107: Figure 4.31: Another example of an
Page 110 and 111: Figure 4.33: Electron micrographs o
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Figure 4.34: Electron-micrographs o
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Figure 5.1: lntact and penetrated n
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Figure 5.2 Material from the pollen
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Figure 5.3: ln Prumnopitys taxifoli
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Figure 5.5 After fertilization, the
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Figure 5.6: Unfertilized archegonia
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Figure 5.7: Changes in unfertilized
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Figure 5.8: An unusual archegonium
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Figure 5.10: ln Prumnopitys taxifol
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Figure 5.13: Outside the newly cell
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Figure 5.15: ln Prumnopitys taxitol
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Figure 5.16: Five-celled and eight-
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Figure 5.17: Some proembryos can ha
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Figure 5.18 : ln Prumnopitys taxifo
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Figure 5.19: ln Prumnopitys taxitol
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Figure 5.20: The middle of the susp
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Figure 5.21 : ln Prumnopitys taxifo
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Figure 5.24: Within the female game
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Figure 5.25: Transverse sections of
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Figure 5.26: One embryo was observe
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Figure 5.27: The dehiscence zone in
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Figure 5.28: Transition between hyp
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Figure 5.29: In the germinating emb
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Figure 5.30 : Further tissue develo
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Figure 5.31: In the germinating emb
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