Il genereAllium L. in Italia. IV. Studio citofotometrico sul granulo pollinico diAllium ChamaemolyL.
作者:
Gabriella Corsi,
GiovannaCela Renzoni,
期刊:
Giornale botanico italiano
(Taylor Available online 1972)
卷期:
Volume 106,
issue 5
页码: 257-264
ISSN:0017-0070
年代: 1972
DOI:10.1080/11263507209426554
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The genus Allium L. in Italy. IV. A DNA cytophotometric study on the pollen grain of Allium chamaemoly L. — A cytophotometric analysis of DNA contents in pollen generative and vegetative nuclei ofAllium chamaemolyL. was carried out. DNA synthesis in both nuclei was confirmed and a lightly higher DNA amount than 2C in the vegetative nucleus was pointed out. An analysis of the Fast-green stainable histones in the generative and vegetative nuclei was also accomplished. While the generative nucleus had a very high content of Fast-green stainable histone, the vegetative one have nearly no stainable histone. The occurrence of DNA synthesis and the very low histone content suggest the vegetative nucleus is functional and biochemically activ. The higher than 2C DNA content supports the possibility of a DNA amplification process including probably the amplification of ribosomal cistrons in the pollen vegetative nucleus.
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