Abstract:
:Cytophotometry of individual nuclei was used to examine the level of endoreduplication in epidermal cells from the upper and lower parts of the ovary during Ornithogalum umbellatum flower and fruit development. An increase in DNA content from 2-4C to 2-8C in both parts of the ovary was observed, while the epidermal cell surface area grew about 6-fold and 15-fold in the lower and upper parts of the ovary, respectively. However, the correlation between mean epidermal cell size and ploidy was distinct during epidermis growth. Lipotubuloids became bigger in the upper than in the lower part during ovary and fruit development. In addition, more dynamic growth of the epidermal cells of the upper than of the lower part of the ovary was connected to the higher content of gibberellic acid. A hypothesis has been put forward that the role of DNA endoreduplication in epidermal cell growth was modulated by the function of lipotubuloids and the gradient of gibberellin.
journal_name
J Exp Botjournal_title
Journal of experimental botanyauthors
Kwiatkowska M,Poplonska K,Kazmierczak A,Stepinski D,Rogala K,Polewczyk Kdoi
10.1093/jxb/erm071subject
Has Abstractpub_date
2007-01-01 00:00:00pages
2023-31issue
8eissn
0022-0957issn
1460-2431pii
erm071journal_volume
58pub_type
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