Evolution and Development of Inflorescence Architectures

To understand the constraints on biological diversity, we analyzed how selection and development interact to control the evolution of inflorescences, the branching structures that bear flowers. We show that a single developmental model accounts for the restricted range of inflorescence types observed in nature and that this model is supported by molecular genetic studies. The model predicts associations between inflorescence architecture, climate, and life history, which we validated empirically. Paths, or evolutionary wormholes, link different architectures in a multidimensional fitness space, but the rate of evolution along these paths is constrained by genetic and environmental factors, which explains why some evolutionary transitions are rare between closely related plant taxa.

[1]  E. Coen,et al.  Evolutionary Paths Underlying Flower Color Variation in Antirrhinum , 2006, Science.

[2]  P. Doerner,et al.  Arabidopsis REGULATOR OF AXILLARY MERISTEMS1 Controls a Leaf Axil Stem Cell Niche and Modulates Vegetative Development[W] , 2006, The Plant Cell Online.

[3]  S. Leibler,et al.  Phenotypic Diversity, Population Growth, and Information in Fluctuating Environments , 2005, Science.

[4]  N. Barton.  Fitness Landscapes and the Origin of Species , 2004 .

[5]  T. Prout,et al.  Within-generation bet hedging: a seductive explanation? , 2003 .

[6]  D. Weigel,et al.  Interaction of LEAFY, AGAMOUS and TERMINAL FLOWER1 in maintaining floral meristem identity in Arabidopsis. , 2002, Development.

[7]  C. Dean,et al.  Arabidopsis, the Rosetta stone of flowering time? , 2002, Science.

[8]  J. Long,et al.  Initiation of axillary and floral meristems in Arabidopsis. , 2000, Developmental biology.

[9]  T. Sachs.  ‘Node counting’: an internal control of balanced vegetative and reproductive development , 1999 .

[10]  E. Coen,et al.  Separation of shoot and floral identity in Arabidopsis. , 1999, Development.

[11]  I Amaya,et al.  A common mechanism controls the life cycle and architecture of plants. , 1998, Development.

[12]  D Weigel,et al.  LEAFY expression and flower initiation in Arabidopsis. , 1997, Development.

[13]  E. Coen,et al.  Inflorescence Commitment and Architecture in Arabidopsis , 1997, Science.

[14]  Y. Iwasa,et al.  Optimal Mixed Strategies in Stochastic Environments , 1995 .

[15]  G. Haughn,et al.  Genetic analysis of the floral initiation process (FLIP) in Arabidopsis , 1993 .

[16]  D. Weigel,et al.  LEAFY controls floral meristem identity in Arabidopsis , 1992, Cell.

[17]  M. J. Dallwitz,et al.  The Families of Flowering Plants: Descriptions, Illustrations, Identification and Information Retrieval , 1992 .

[18]  Daniel Barthélémy,et al.  Levels of organization and repetition phenomena in seed plants , 1991 .

[19]  S. Shannon,et al.  A Mutation in the Arabidopsis TFL1 Gene Affects Inflorescence Meristem Development. , 1991, The Plant cell.

[20]  R. Raff.  The Shape of Life , 1996 .

[21]  Joe C. Campbell,et al.  Developmental Constraints and Evolution: A Perspective from the Mountain Lake Conference on Development and Evolution , 1985, The Quarterly Review of Biology.

[22]  Jonathan Roughgarden,et al.  Graded allocation between vegetative and reproductive growth for annual plants in growing seasons of random length , 1982 .

[23]  J. Roughgarden,et al.  Multiple switches between vegetative and reproductive growth in annual plants , 1982 .

[24]  O. Smirnova,et al.  Age states of plants of various growth forms: a review. , 1980 .

[25]  David M. Raup,et al.  Geometric analysis of shell coiling; coiling in ammonoids , 1967 .

[26]  D. Cohen.  Optimizing reproduction in a randomly varying environment. , 1966, Journal of theoretical biology.

[27]  D M Raup,et al.  Theoretical Morphology of the Coiled Shell , 1965, Science.

[28]  R. O. Erickson,et al.  THE PLASTOCHRON INDEX , 1957 .