Disentangling phylogenetic and functional components of shape variation among shoot apical meristems of a wide range of herbaceous angiosperms

0532341 - BÚ 2021 RIV US eng J - Journal Article
Schnablová, Renáta - Neustupa, J. - Woodard, K. - Klimešová, Jitka - Herben, Tomáš
Disentangling phylogenetic and functional components of shape variation among shoot apical meristems of a wide range of herbaceous angiosperms.
American Journal of Botany. Roč. 107, č. 1 (2020), s. 20-30. ISSN 0002-9122. E-ISSN 1537-2197
R&D Projects: GA ČR GB14-36079G; GA ČR(CZ) GA19-13231S
Institutional support: RVO:67985939
Keywords : cell size * shape allometry * shoot apical meristem
OECD category: Ecology
Impact factor: 3.844, year: 2020
Method of publishing: Open access

The shoot apical meristem (SAM) is the basic determinant of plant body organization, but interspecific variation in SAM shape and its relationship to stem and leaf morphological traits is not well known. We found large variations in SAM shapes across angiosperm lineages. The dominant shape variation (dome-shaped vs. flat surface) was size-independent and strongly phylogenetically conserved. SAM shapes were largely independent of their cell size and therefore of the number of cells involved. Different patterns in shape variation of outer and inner SAM boundaries were associated with stem thickness, leaf area, and leafiness of the stem. The findings show that geometric interdependence of meristem zones gives rise to correlations among organ numbers, sizes, and their proportions. Phylogenetic conservatism in these correlations indicates conservatism in regulatory processes that underlie the correlations, or the individual traits, that give rise to plant architecture.
Permanent Link: http://hdl.handle.net/11104/0310850