Effects of diurnal and bidiurnal photoperiodic treatments on mitosis inPharbitis
作者:
HaroldA. Simmons,
期刊:
Journal of Interdisciplinary Cycle Research
(Taylor Available online 1978)
卷期:
Volume 9,
issue 2
页码: 97-103
ISSN:0022-1945
年代: 1978
DOI:10.1080/09291017809359628
出版商: Taylor & Francis Group
关键词: Flowering response;mitotic index;Pharbitis nil;photoperiodism
数据来源: Taylor
摘要:
Photoperiodic effect on mitotic activity of buds from dwarfPharbitishas been analyzed. No significant differences in mitotic activity were found in plants grown under long days or diurnal (24 h) light break photoperiodic treatments. Differences in both mitotic activity and flowering were seen in plants subjected to diurnal short days, bidiurnal (48 h) short days, or bidiurnal short days with light breaks. An elevation of mitotic activity occurs in plants grown in bidiurnal photoperiodic treatments compared to diurnal treatments. The differences in mitotic activity of buds, both vegetative and floral, seem to indicate that both phytochrome and light effect on an endogenous rhythm influence meristematic activity. Also, the extended dark period of a bidiurnal short day enhances both mitosis and flowering.
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