These stimuli were colorimetric metamers
, but they were not visual metamers
to real human observers.
The recursive equations for the moments of the numbers of metamers are finally deduced.
However, we can distinguish two types of metamers along the stem.
Let [m.sub.j] [[s.sup.k,[beta].sub.[phi]], n] be the number of type j metamers in a structure initiated by [s.sup.k,[beta].sub.[phi]] after n growth cycles and let [M.sub.n] be the matrix of size (N + 1)[P.sup.2] by P whose j-th column vector is [(E[[m.sub.j] [[s.sup.k,[beta].sub.[phi]],n]]).sub.k,[beta],[phi]].
In Abutilon, neighbor identity had no effect on above-ground biomass, number of main axis nodes, maximum internode length, petiole length, area per leaf, and metamer mass, or specific masses of stems, petioles, or leaves (0.0786 [less than or equal to] P [less than or equal to] 0.3531 from ANOVA; Table 1).
Petiole leaf inclination angles of both Abutilon and Polygonum followed a regular pattern with metamer age, and were generally unaffected by neighbor identity.
In all target species plant aboveground biomass, and within-plant maximum internode and metamer mass, were the most variable characters (among individual plants) measured (Table 4).
An alternative argument is that earlier flowering in the cultivar arose through a deletion of metamers
. In plants with variable growth pattern where nodal position does not accurately reflect comparable phases of development, a hypothesis of deletion or insertion of metamers
may be untestable.
Thus, plants do not merely increase in size (biomass, height, volume) during ontogeny by adding metamers, but these metamers almost universally show a certain degree of variation, in part simply because an increase in size necessitates correlated changes in shape and geometry (Niklas, 1994).
The first represents a lack of ontogenetic changes in size or shape of a vegetative metamer (isomorphy), the second gradual changes in size and/or shape of varying degrees (allomorphy), and the last an abrupt change in form (metamorphosis).
So, for instance, generative cells constitute the meristem, which produces metamers, which together make up modules.
The metamer is defined as the internode, upper node, attached leaf, and axillary bud(s) (Barlow, 1989), and metamerism (White, 1984) is the serial repetition of metamers within or along an organism.