Endogenous Cytokinin and Gibberellin Levels in Relation to Inflorescence Development in Tomato

Flowering

“…Recent investigations have been concerned with the mechanisms controlling the movement of carbon assimilates into the inflorescence (Leonard and Kinet, 1982;Leonard et ai., 1983;Morris, 1982, 1983). Evidence has been quoted that these aspects of floral development, like the initiation of the first inflorescence, are influenced by the availability of carbon assimilates and are subject to correlative inhibitions exerted by other parts of the plant.…”

“…Nourai (1980) found that localized application of GA3 to the inflorescence of plants grown in a low-light regime caused an increase in flower abortion but this effect was accompanied by increased elongation growth elsewhere in the shoot system (Table 4.5). Leonard and Kinet (1982) assayed levels of endogenous gibberellin in the inflorescences of plants grown in favourable and adverse light conditions. Brown, Jackson and Burlingham (1968) observed abscission of flower buds in tomato in response to application of GA3 .…”

The Tomato Crop

“…Leonard and Kinet (1982) demonstrated much reduced cytokinin activity in extracts of inflorescences of plants subjected to light conditions that caused a high incidence of flower abortion. showed that reductions in the number of flowers reaching anthesis in phosphorusdeficient tomato plants were accompanied by decreases in the cytokinin activity of root exudate collected from the plants.…”

“…Where gibberellins were effective in reducing flower abortion, they were applied locally to the inflorescence together with benzyladenine Kinet et al, 1978). Leonard and Kinet (1982) assayed levels of endogenous gibberellin in the inflorescences of plants grown in favourable and adverse light conditions. Nourai (1980) found that localized application of GA3 to the inflorescence of plants grown in a low-light regime caused an increase in flower abortion but this effect was accompanied by increased elongation growth elsewhere in the shoot system (Table 4.5).…”

Effects of Temperature and Ethylene Response Inhibitors on Growth and Flowering of Passion Fruit

“…Additionally, treating tomato plants with gibberellic acid (GA) reduced flower bud formation and caused them to produce their first flower buds on higher nodes (Abdul and Harris, 1978;Sasaki et al, 2005). At high temperature, young leaves of tomato contained relatively higher GA content leading to enhanced plant growth, while flower formation and development were suppressed (Abdul and Harris, 1978;Beppu et al, 2001;Leonard and Kinet, 1982). The same effects were observed in grape (Ziv et al, 1981).…”