The Position in the Plant and the Date of Origin of Tillers Which Produce Inflorescences

Abstract

The dates of their first appearance and the dates of flowering were recorded monthly over three years from time of sowing for all tillers produced by S21S meadow fescue plants growing in simulated sward conditions in large concrete pots outdoors. The results are expressed and discussed in terms of the percentage contribution of inflorescences by tillers in relation to their chronological and ontogenetic age. The latter appeared the more important. The major contribution of inflorescences was made by primary tillers in the first harvest year, by secondary and tertiary tillers in the second year and by tertiary and quaternary tillers in the third year. The chronological age at which tillers could flower ranged from 3 to 33 mouths.

Regrowth characteristics of an S. 23 perennial ryegrass sward defoliated at early stages of reproductive development

“…Any such consideration must take account of two factors, namely, the sequential origin of the tillers comprising the sward, and vernalization effects. Lambert & Jewiss (1970) found that the majority of the tillers contributing to seed crops of S. 215 meadow fescue arose during the summer/autumn of the preceding season; for tillers of a given order (primary . .…”

Seed Yield of Bahiagrass in Response to Sward Management by Phenology

“…The high contribution of early forming tillers (following harvest in fall) to inflorescence population is supported by the findings of other workers with perennial ryegrass and Kentucky bluegrass (Saxby, 1956); timothy (Langer, 1956;Wilson, 1959), smooth bromegrass (Bromus inermis Leyss.) (Lamp, 1952), and orchardgrass (Dactylis glomerata L.) (Lambert, 1963;Lambert and Jewiss, 1970;Langer and Lambert, 1959). The major effect of applied N was to increase floret number per inflorescence (Hill and Watkin, 1975).…”

Effect of management factors on tiller dynamics in tall fescue: Numbers of tillers reaching reproductive maturity

“…This response is believed to have been due to the Tiller 2 daughter tillers having being initiated earlier than those of Tiller 5 and so were better developed suggesting that tiller age, perhaps through its relationship with tiller developmental stage, influences reproductive tiller initiation. Lambert & Jewiss (1970) stated that the young, less developed tillers provide the basis for the reproductive tiller population only in the year following their initiation. Furthermore, Lambert & Jewiss (1970) and Colvill & Marshall (1984) observed that in both Festuca pratensis and Lolium perenne the main components of the flowering tiller population in the first year was formed by the main shoots and primary tillers, by the secondary and tertiary tillers in the second year, by tertiary and quaternary tillers in the third year and so forth.…”

“…Although many tillers are produced by a pasture, only a small proportion of these become reproductive (Langer 1959;Lambert 1968;Lambert & Jewiss 1970). The number which become reproductive and the seed production from each is influenced by many management factors, for example plant density, nitrogen (N) fertilization, cutting and position of tillers on the plant (Lambert 1963(Lambert , 1968Lambert & Jewiss 1970).…”

“…Plant density has an important bearing on the number of tillers per plant and the proportion which become reproductive, with a low plant density reportedly increasing reproductive tiller numbers (Lambert 1964;Lambert & Jewiss 1970).…”