| Ultradian movements of shoots of two species of soybeans Glycine soja (Sieb. and Zucc.) and Glycine max (L.) Merr. | |
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MedLine Citation:
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PMID: 9493709 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Circumnutation movements of shoot tips of two species of soybean were studied. Shoot tips of Glycine soja (Sieb. and Zucc.) moved in a counterclockwise direction with a mean period (+/- SD) of 108 +/- 9 minutes when the shoots were not handled prior to monitoring (n = 17). Effects of mechanical stress or stimulation (thigmomorphogenesis) resulted in the lengthening of the mean period by 15% when shoot lengths were measured (handled) prior to monitoring movements (124 +/- 18 minutes, n = 49) or handled and restaked prior to monitoring movements (124 +/- 14 minutes, n = 11). Shoot tips of G. max cultivars moved counterclockwise, and, depending on the cultivar, periods ranged from 112 minutes to 133 minutes, with an overall average period of 124 +/- 21 minutes (n = 21). This period was identical to the mean period of comparably handled G. soja shoot tips. Amplitudes for the four G. max cultivars were much smaller (0.12 cm to 1.43 cm) than for G. soja (2.9-8.7 cm). Factors that may have contributed to differences in rhythm characteristics between species and among cultivars included the presence of a distinguishable bending zone in G. soja, but not in G. max, and morphological features associated with shoot development. |
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Authors:
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K A Adolfson; R B Sothern; W L Koukkari |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Chronobiology international Volume: 15 ISSN: 0742-0528 ISO Abbreviation: Chronobiol. Int. Publication Date: 1998 Jan |
Date Detail:
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Created Date: 1998-04-21 Completed Date: 1998-04-21 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8501362 Medline TA: Chronobiol Int Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1-11 Citation Subset: IM; S |
Affiliation:
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Department of Plant Biology, University of Minnesota, St. Paul 55108, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Activity Cycles
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physiology* Plant Shoots / physiology* Soybeans / physiology* Stress, Mechanical |
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