Determinate inflorescences

Scorpioid Cyme A broad or flatfish determinate inflorescence coiled circinately in the bud. 

Determinate Inflorescences.—Determinate Anthotaxy is one in which the first flower that opens is the terminal one on the axis, the other appearing in succession from apex to base or from center to margin. The principal varieties are ... 

Cyme.—A more or less flat topped determinate inflorescence. 

Where the main stem is terminated by a single flower and ceases to grow in length any further growth takes place by lateral branches, and they eventually terminate in a single flower and growth is stopped - a determinate inflorescence (Fig. 1.24b), e.g. linseed. 

Inflorescence or Anthotaxy.—A typical flower consists of four whorls of leaves modified for the purpose of reproduction, and compactly placed on a stem. The terms Inflorescence and Anthotaxy are applied to the arrangement of the flowers and their position on the stem, both of which are governed by the same law which determines the arrangement of leaves. For this reason flower buds are always either terminal or axillary. In either case the bud may develop a solitary flower or a compound inflorescence consisting of several flowers. 

Determinate, cymose, descending, or centrifugal inflorescence is that form in which the flower bud is terminal, and thus determines or completes the growth of the stem. Example Ricinus communis. 

Figure 1 Release rates of the major lerpenes from intact flowering Arahidopsis Col plants and parts of these plants determined by dynamic headspace sampling. Inflorescences are the main source of conslitiilive terpenc emission.

Comparison of native populations, cultivars and fonned complex hybrid populations on diSeient elevation made possible to show the environmental influence on seed set. We took into consideration temperature regime of air and soil, sum of precipitation, humidity and acidity of upper layer of soil (where roots are situated). It was found that on the same elevation, but on different soils seed set was different. For example, on elevation 900 m above sea level seed set was 27.5% on acid soil (pH 4.47) and 46.8% on nearly neutral soil (pH 6.45). On elevation 2000 m above sea level on two plots with pH 6.44 and 6.15 seed set of clover was 49.5 and 47.0%, respectively. It was also determined that the number of weak seeds changed in dependence upon soil acidity with the maximal proportion (above 50%) at pH 4.47. Seed set in inflorescences is higher on 9.5-27.1%, where acidity is 6.0 or above it. 

K. Suvardhan, K.S. Kumar, L. Krishnaiah, S. Prabakhara Rao, and P. Chiranjeevi. The determination of nickel(n) after on-line sorbent preconcentration by inductively coupled plasma atomic emission spectrometry using Borassus Flabellifer inflorescence loaded with coniine dithiocarbamate. Journal of Hazardous Materials 112 233-238,2004. 

G. Blute, Bliitenstand R fleur, inflorescence A flower or a cluster of flowers on a common axis is called an i. (see figure below). The most common i. in crop plants is the cyme and the raceme. A cyme is a determinate i. consisting of primary, secondary, tertiary and often additional floral branches. Opening of flowers will start with the flowers of the primary branch. An example of a cyme is the potato. 

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