Open AccessThe diversity and ontogenetic changes of phyllotaxis in wild‐types and two leaf form mutants of Antirrhinum majus L.
Author(s) -
MATKOWSKI ADAM,
ADLER KLAUS
Publication year - 1999
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1111/j.1095-8339.1999.tb00767.x
Subject(s) - phyllotaxis , biology , antirrhinum , antirrhinum majus , botany , inflorescence , stipule , fibonacci number , mutant , meristem , genetics , arabidopsis , shoot , gene , mathematics , discrete mathematics
We have analysed the phyllotactic patterns of the main shoot in vegetative and generative phases of growth in wild type and mutant plants of Antirrhinum majus L. Wild types ‘Sippe50’ and ‘W l08’ were compared to mutants grminifolia and phanlastica . The normal vegetative phyllotaxis of the wild type plants is decussate, but the inflorescence phyllotaxis is spiral and of the Fibonacci type. The phyllotaxis patterns of the mutants differ strongly from that of the wild type. Besides decussate phyllotaxis, whorls of three or four elements as well as spiral patterns in vegetative phase were observed. The vegetative phyllotaxis in mutants is ontogenetically unstable with frequent transitions between patterns, including the reversion of chirality of spiral phyllotaxis. The number of transitions per plant was larger in graminifolia than in phantastica . The inflorescence phyllotaxis was more stable and occasional non‐typical phyllotaxis patterns finally transformed to a Fibonacci pattern. The results suggest a possible role of genetic factors in determining the regularity of spatial arrangement of organs.