Effect of N-Phenyl-N'-(4-Pyridyl)urea (4-Pu) on Fruit Size: Apple Japanese Pear, Grapevine and Kiwi Fruit

Chlorophenoxyacetic acid and chloropyridylphenylurea accelerate translocation of photoassimilates to parthenocarpic and seeded fruits of muskmelon (Cucumis melo)

“…It also increased the flux of 14 C-assimilate into the fruit at 10 DAA. It is known that CPPU promotes the growth of many fruits (Nickell, 1986;Iwahori et al, 1988;Ogata et al, 1988;Zhao et al, 1991;Kim et al, 2006;Ku and Woolley, 2006;Zabadal and Bukovac, 2006;Willamson and NeSmith, 2007). The fruits affect sink strength, which promotes photoassimilate translocation from the leaves.…”

Cytokinins increase fruit size of ‘Delicious’ and ‘Golden Delicious’ (Malus domestica) apple in a warm climate

“…With other apple cvs., such as 'Mutsu', 'Tsugara' (Ogata et al, 1989) and 'Granny Smith' (Nickel, 1986), CPPU increased fruit-size without influencing total yield. However in 'McIntosh' apple, increased fruit-size due to CPPU was attributed not only to an increase in cell division, but also to fruit thinning (Greene, 1989).…”

Hormonal regulation of fruit set, parthenogenesis induction and fruit expansion in Japanese pear

“…Cytokinins are another hormone class that is known to affect cell division, assimilate transport and protein synthesis in fruit growth (Antognozzi et al 1996). CPPU (N-(2-chloro-4-pyridyl)-N 0 -phenylurea), a synthetic cytokinin, has been found to be effective in inducing parthenocarpy and in enhancing fruit enlargement by stimulating cell division and/or cell expansion in many kinds of fruits, such as apple, kiwifruit, loquat, and water melon (Iwahori et al 1988;Ogata et al 1989;Bangerth and Schroder 1994;Takagi et al 1994;Hayada et al 1995;Lewis et al 1996;Yu 1999). Clarifying the exact roles of these two hormone classes during fruit growth can be useful in giving us a better understanding of fruit development and may also be useful in the production of high quality fruit in Japanese pear.…”