Analysis of gibberellins in growing fruits ofLycopersicon esculentumafter pollination or treatment with 4-chlorophenoxyacetic acid

Seed Formation Promoted by Paclobutrazol, a Gibberellin Biosynthesis Inhibitor, in pat-2 Parthenocarpic Tomatoes

“…In the past, several researchers have reported correlations between gibberellin and auxin (Koshioka et al, 1994;Sastry and Muir, 1963;Serrani et al, 2008). Koshioka et al (1994) and Serrani et al (2008) showed that auxin seems to be able to stimulate gibberellin biosynthesis, but in turn, Sastry and Muir (1963) showed that the application of gibberellin could induce an increase in auxin content. Like this, the signal transduction pathways of auxin and gibberellin have not been sufficiently elucidated (de Jong et al, 2009).…”

“…Kataoka et al (2008) suggested that this pseudoembryo development, which filled up the embryo sac cavity, prevented fertilization. Because gibberellin activity increased from flower opening in parthenocarpic tomatoes (Kataoka et al, 2004b;Koshioka et al, 1994;Mapelli et al, 1978), endogenous gibberellin was considered to play an important role in the early stages of fruit growth and development (Kataoka et al, 2004b). Uniconazole-P, a gibberellin biosynthesis inhibitor, completely inhibited fruit growth and suppressed pseudoembryo development (Kataoka et al, 2003), supporting the importance of gibberellin in fruiting in parthenocarpic tomatoes.…”

Pengaruh Giberelin Terhadap Karakter Morfologi dan Hasil Buah Partenokarpi pada Tujuh Genotipe Tomat (Solanum lycopersicum L.)

“…Auksin diperlukan untuk pembelahan sel dan meningkatkan pembentukan jumlah sel. Kandungan auksin dan GA 3 di dalam ovarium meningkat setelah terjadinya polinasi dan pembuahan (Mapelli et al, 1978;Sjut and Bangerth, 1982;Koshioka et al, 1994) sehingga adanya peningkatan jumlah sel dan pembesaran sel yang diatur oleh auksin dan giberelin pada kontrol mengakibatkan perikarp lebih tebal daripada perlakuan GA3 20 ppm.…”

Phytohormones in Shoots and Fruits of Tomato; Apoplast Solution and Seedless Fruit

“…Thus it is suggested that the SP of partitions might be the sites of IAA synthesis during the expansion stage and later the AP of pericarps might also participate. (2) Roles and catabolization for GA 1 Gibberellic acid 1 (GA 1 ) was identified, but GA 4 could not be detected in either pollinated or parthenocarpic fruitlets of tomato, suggesting that the early-nonhydroxylation pathway might not function in tomato fruits 22 . Thus only GA 1 levels as active GA were analyzed.…”