. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. Other sjnergide remains unchanged, or passes Uirongli neai'ly the same changes as those described. It should be said that in some instances the pollen-tnbe passes down without apparentl3- affect- ing the sjnergidaa to anj' very marked extent, but producing its influence di- rectly* upon the oosphere. 1129. These changes now described in the oosphere are known collectively as those of fertilization or impregnation ; tlie fertilized or impregnated oosphere is te
. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. Other sjnergide remains unchanged, or passes Uirongli neai'ly the same changes as those described. It should be said that in some instances the pollen-tnbe passes down without apparentl3- affect- ing the sjnergidaa to anj' very marked extent, but producing its influence di- rectly* upon the oosphere. 1129. These changes now described in the oosphere are known collectively as those of fertilization or impregnation ; tlie fertilized or impregnated oosphere is termed an oospore. It passes through a series of changes bj- which a second cell is formed, then others in a linear series, or in a more complex chain, termed the proembryo or suspensor. In some cases, however, no suspensor at all is Fig. 20i. Capsella Biirsa^paBtoris. Embryo developed more than in Fig. 203. A longitudinal section showing cotyleQons, kb ; v, point of growth; e, suspensor; p/, plerom ; p and pe, periblem ; (?, anil d'-, dermatogen; A^, and h^. root-cap. (Hanstein.) Fig. 205. Camelina pativa. a, two-celled embrjo, much exceeded in size by the long suspensor. Capsella Bursa-pastoris, the figures &, r, showing different stages in the development of the embryo; b,c,fJ, aspects of the embryo divided into quadrants; e,f,gi different views of the embryo at the formation of the dermatogen ; i, longitudinal sec- tion showing further divisions and the formation of the periblem and plerom; A", same as j, but given in perspective; /, longitudinal, m, transverse, section of the same em- bryo at a later stage; n, perspective view of embryo at a little earlier stage than / and m; o,^, r, later stages; g, same embryo seen from below, exhibiting the first divisions near the suspensor; s, s', s", cells nearest the suspensor, (, after Praz- mowski.) â â - - .. Please note that these images are extracted from scanned page images that may have be
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplantanatomy, bookyea
