کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6370999 1623897 2012 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Systematic variations in divergence angle
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Systematic variations in divergence angle
چکیده انگلیسی

Practical methods for quantitative analysis of radial and angular coordinates of leafy organs of vascular plants are presented and applied to published phyllotactic patterns of various real systems from young leaves on a shoot tip to florets on a flower head. The constancy of divergence angle is borne out with accuracy of less than a degree. It is shown that apparent fluctuations in divergence angle are in large part systematic variations caused by the invalid assumption of a fixed center and/or by secondary deformations, while random fluctuations are of minor importance.

► Floating centers of divergence angle proposed. ► Indexing sunflower seeds based on a number theoretic algorithm. ► Accurate control of divergence angle is borne out with accuracy of less than a degree. ► Displacement from regular position of packed organs resembles incompressible flow of fluid dynamics. ► Systematic variation explains why only a few leaves suffice to give the mean angle close to the limit divergence.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Theoretical Biology - Volume 313, 21 November 2012, Pages 20-41
نویسندگان
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