Extraordinary accuracy in floret position of Helianthus annuus | Zendy

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Extraordinary accuracy in floret position of Helianthus annuus

Author(s) -

Takuya Okabe

Publication year - 2015

Publication title -

acta societatis botanicorum poloniae

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.297

H-Index - 29

eISSN - 2083-9480

pISSN - 0001-6977

DOI - 10.5586/asbp.2015.007

Subject(s) - phyllotaxis , helianthus annuus , divergence (linguistics) , ideal (ethics) , botany , mathematics , position (finance) , biology , sunflower , horticulture , linguistics , philosophy , epistemology , shoot , meristem , finance , economics

Divergence angles were measured for inorescences of Helianthus annuus with several hundreds to more than a thousand disk owers. Quantitative analysis showed that the angles are robustly xed in the vicinity of the ideal golden angle 137.508° as accurately as ~0.001°. The mean deviation from the ideal value varies for each sample. The results have important implications for phyllotaxis models, which are discussed by referring to a necessary modication proposed by Roberts

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