ISSN:
1615-6102
Keywords:
Flower closing
;
Flower opening
;
Ipomoea tricolor
;
Senescence
;
Vacuole
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Examination of rib tissue of developing flower buds and flowers ofIpomoea tricolor utilizing the light and electron microscopes resulted in the identification of a group of inner epidermal cells which undergo dynamic structural changes during the two days prior to flowering, during flowering and during flower fading. Over a three-day period these cells undergo enlargement, modification of shape, reduction in wall thickness, extensive vacuolation and autophagic activity, transition from a ribosome-rich cytoplasm with stacked RER and dictyosome complexes to one with only a few isolated organelles and a limited number of ribosomes, and modification of the tonoplast membrane. In contrast, other cells of the rib vacuolate prior to flowering and exhibit no further changes. The structural changes in the inner epidermal cells suggest that they affect the turgor status of the cells and initiate the opening and eventual closing of the flower.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01279588
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