Regulation by Abscisic Acid of In Vitro Flower Formation in Torenia Stem Segments

Tanimoto, Shizufumi; Miyazaki, Akira; Harada, Hiroshi

doi:10.1093/oxfordjournals.pcp.a076957

Cited by 17 publications

(9 citation statements)

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“…Thus, it is possible to investigate the gradients of substances related to flowering through the floral gradient. For example, A BA has been found to be closely related to floral gradient in Torenia fournieri in this way [16]. The results here showed that the floral gradient in flowering tobacco plant was obvious in different stages, although the frequencies of floral bud regeneration from TCLs varied with the developmental stages.…”

Section: Discussionsupporting

confidence: 54%

Floral gradient in flowering tobacco in relation to free amino acids

YongNing¹,

Li²

1993

Cell Res

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By employing TCLs (thin cell layers) culture, the floral gradient in flowering tobacco of different developmental stages was confirmed. The TCLs from early flowering tobacco regenerated more floral buds than those from the tobacco plants in full blooming or fruiting stages. Analysis of free amino acid levels revealed the acropetal gradient of Pro in flowering tobacco stem. L-Pro, L-Trp, D,L-Met and L-Arg were respectively added into the culture medium for testing their influence on floral bud formation from tobacco pedicel segments. Only L-Trp evidently enhanced the floral bud neoformation.

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Section: Discussionsupporting

confidence: 54%

Floral gradient in flowering tobacco in relation to free amino acids

YongNing¹,

Li²

1993

Cell Res

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“…Torenia stem segments and endogenous ABA concentrations correlated with flowering (Tanimoto et al 1985). Thus, changes in ABA biochemistry may be partially responsible for rejuvenation of TC-plants.…”

Section: Endogenous Aba Concentrationmentioning

confidence: 95%

“…However, the endogenous ABA concentration in apple leaves allowed to diffuse into water did not change over 24 h (Weinbaum & Powell 1975). Older leaves, sources of ABA (Tanimoto et al 1985;Weinbaum & Powell 1975), are also removed before culture. Endogenous concentrations of ABA were not determined in in vitro explants in this study.…”

Section: Endogenous Aba Concentrationmentioning

confidence: 99%

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The role of abscisic acid and plant growth regulators in tissue culture-induced rejuvenation of strawberry ex vitro

Mohamed

Swartz

Buta

1991

Plant Cell Tiss Organ Cult

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Plant growth regulators applied in vitro affected strawberry plant performance ex vitro for a period of up to 4 months. Benzyl-adenine and gibberellin enhanced juvenile characteristics; in general, more runners and monofoliolate leaves were produced, net photosynthesis was reduced, leaf diffusive resistance was increased and, on occasion, flowering was delayed. In contrast, abscisic acid and a gibberellin biosynthesis inhibitor, paclobutrazol, resulted in a more adult phenotype; specifically, flowering was earlier, net photosynthesis and leaf diffusive resistance rates were equal to those of adult plants, and fewer leaves were monofoliolate. Tissue culture-produced plants reacquire the adult phenotype earlier than seedlings mature. Abscisic acid application to seedlings also resulted in earlier and increased flowering.Endogenous abscisic acid concentrations were greater in adult plants and less in tissue culture and seedling plants at 3 and 7 weeks ex vitro, after germination or after adult runner propagation. No flowering occurred at 3 weeks in any propagation type and only runner-produced plants flowered at 7 weeks. At 15 weeks, no statistical difference in abscisic acid concentrations existed among propagation treatments and all propagation types flowered. The endogenous concentrations of abscisic acid in plants propagated by all three methods were much higher at three weeks compared to concentrations at 7 or 15 weeks.

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“…In SD plants, application of plant hormone could not induce flowering, but PE from SD-treated cotyledons of Pharbitis nil had flowerinducing activity (Ishioka et al, 1990;Kondoh et al, 1999). Using stem segments of Torenia fournieri, dayneutral plant, Tanimoto et al (1985) reported that floral bud formation in vitro was induced by specific content of endogenous ABA. In many LD plants, application of GA Vol.…”

Section: Figmentioning

confidence: 99%