| A protractor was used to measure the angle of this line to the transverse line and hence the angle to the apex of the nucellus. |
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| A nucellar dome has been formed in the massive nucellar cap and the integument has overgrown the nucellus and formed a wide-open micropyle. |
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| Diboll and Larson report that there are no plasmodesmata connecting the nucellus to the embryo sac. |
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| At this stage the triploid endosperm nuclei are approximately the same size as the diploid nuclei of the pericarp and nucellus. |
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| In wheat, evidence was found that a barrier occurred in the chalaza, a small zone of cells between the maternal vascular tissue and the nucellus. |
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| Instead, it appears that there is a barrier to movement between the post-phloem symplast and the nucellus. |
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| Other barriers may also exist because xylem-mobile safranin failed to enter the ovary although the xylem passes around the nucellus and into the stylar tissue. |
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| Ovules consisted of an outer integument that surrounded the inner integument to form the micropyle, with the inner integument surrounding the nucellus and embryo sac. |
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| Only one pollen tube tip entered the nucellus through the micropyle. |
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| The antipodal cells of the female gametophyte sometimes acquire glandular properties, as may cells of the nucellus surrounding the embryo sac. |
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| It is in the nucellus that meiosis occurs, resulting in the formation of four haploid megaspore cells. |
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| Within the ovary, pollen tubes also grew in the ECM to penetrate the micropyle and subsequently grew intercellularly within the nucellus up to the embryo sac. |
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| Sugar beet belongs to the Amaranthaceae and utilizes the starchy perisperm, a diploid maternal tissue originated from the nucellus, as a storage organ of the seed. |
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| In addition, SUB EGFP expression in the distal nucellus of ovule primordia can rescue to a large extent defects in the integuments, tissue that originates from the central chalaza. |
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| Over the next three to five months, the male gametophyte develops into a haustorial pollen tube, which eventually penetrates the nucellus and partially projects into an archegonial chamber. |
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| Through division of the cells in the micropylar end of the nucellus, a cell proliferation is developed that extends beyond the micropyle. |
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| Meanwhile in the nucellus, a single megaspore mother cell undergoes meiosis, forming a tetrad of haploid megaspores, only one of which survives to divide mitotically many times and form a large fleshy female gametophyte. |
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| Ovules are basally attached in both Dasypogon and Calectasia, and possess a massive starchy nucellus. |
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| It is important to note that the 'inner fleshy layer' described above, is part of the integument and not nucellus since the nucellus is generally not vascularised. |
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