Zeatin

About: Zeatin is a research topic. Over the lifetime, 2467 publications have been published within this topic receiving 64092 citations. The topic is also known as: Zeatin & (E/Z)-zeatin.

Effects of growth regulators on light‐dependent anthocyanin production in Zea mays seedlings

Abstract: Rengel, Z. and Kordan, H. A. 1987. Effects of growth regulators on light-dependent anthocyanin production in Zea mays seedlings. The effects of ethylene, indolyl- and naphthylacetic acids, zeatin, benzyladenine, gib-berellic acid and triiodobenzoic acid on anthocyanin production in seedlings of Zea mays L. cv. Golden Bantam were investigated. Endogenously produced and exogen-ously supplied ethylene, as well as the other growth regulators tested markedly suppressed anthocyanin formation. Except for triiodobenzoic acid, the other growth regulators stimulated ethylene production, the amounts produced in the light being larger than those in the dark. Absorption of ethylene by permanganate as well as inhibition of ethylene production or action by Co2+ or Ag+ increased anthocyanin formation in maize seedlings above the level found in the control plants. The inhibiting effect of auxins and cytokinins on anthocyanin production was reversed by Co2+ or Ag+. In contrast, decreased anthocyanin formation caused by gibberellic acid or triiodobenzoic acid seemed unrelated to ethylene and could not be alleviated by Co2+ or Ag+.

Shoot Tip Culture of Japanese Persimmon (Diospyros kaki Thunb.)

Abstract: Aseptic shoot cultures were initiated from shoot tips (1mm) of Diospyros kaki Thunb. cv. ‘Nishimurawase’. Shoot tips were excised from dormant axillary buds and cultured in vitro. The best shoot growth was obtained on MS medium containing half strength nitrogen supplemented with 6-(4-Hydroxy-3-methyl-trans-2-butenylamino) purine (zeatin) at 10-5M; 6-benzylaminopurine (BAP) and 6-(γ, γ-dimethylallylamino) purine (2iP) was ineffective. A five-fold proliferation rate was obtained by single node cutting of elongated shoot.

Flax anther culture: effect of genotype, cold treatment and media

Abstract: We report on screening of wide range of flax cultivars for androgenic response and on testing of induction conditions for flax (Linum usitatissimum L.) anther culture and plant regeneration. Anthers were cultured on four different media: Mo, N6, MS and N&N supplemented with various combinations of growth regulators. The induction of callus formation from cultured anthers was the highest on N6 (with cultivar PR FGL 77 – 12 %) and N&N media (with cultivar Carolin – 2.8 %), preferentially after cold pretreatment (7days at 8 °C). Shoots were formed on calli derived from the microspores inside the cultured anthers on media N&N and N6 supplemented with 1 mg l−1 zeatin or 1 mg l−1BAP + 1 mg l−1NAA, respectively and elongated on MS medium supplemented with 2 mg l−1 zeatin. The highest number of shoots (120) was observed with cultivar Red Wing. Shoots were rooted on MS medium supplemented with 2 mg l−1IAA. Our experiments resulted in total in 62 % anther response and 155 plants regenerated and transferred into soil.