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- Title
Anatomical structure and gravitropic response of the creeping shoots of ground-cover chrysanthemum ‘Yuhuajinhua’.
- Authors
Sumei Chen; Fadi Chen; Nianjun Teng; Weimin Fang; Zhiyong Guan
- Abstract
Abstract The chrysanthemum cultivar ‘Yuhuajinhua’ has a creeping habit. The anatomy and distribution of amyloplasts within ‘Yuhuajinhua’ stems were compared to those typical of non-creeping cultivars. ‘Yuhuajinhua’ stems are similar to those of conventional cultivars; but except for the pith, the proportion of the various tissues present in the upper side of stems was higher than that in the lower side. Most of the amyloplasts lie in the centre of the endodermal cells of the ‘Yuhuajinhua’ stems, rather than at the bottom, as is typical for non-creeping cultivars. When ‘Yuhuajinhua’ plants were oriented horizontally and kept in the dark, the stems retained their original growth direction, and the endodermis amyloplasts sedimented according to the gravitational direction. The endodermis amyloplasts responded rapidly to gravistimulation. The content of IAA in the upper side of the ‘Yuhuajinhua’ stems was higher than that in the lower side, associated with the assymetric growth of the stems.
- Subjects
PLASTIDS; ORGANELLES; PHOTORECEPTORS; PLANT cells &; tissues
- Publication
Plant Growth Regulation, 2008, Vol 56, Issue 2, p141
- ISSN
0167-6903
- Publication type
Article