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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.


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Book ChapterDOI
01 Jan 1989
TL;DR: In fruiting plants there is competition between sinks for photosynthates, ions and hormones, and fruit-root interaction with respect to partitioning of substances consists of a syndrome of effects regulated by hormones.
Abstract: In fruiting plants there is competition between sinks for photosynthates, ions and hormones. It is affected by sink size, sink activity and progress of senescence of individual organs, and modified by environmental factors. Therefore, fruit-root interaction with respect to partitioning of substances consists of a syndrome of effects, regulated by hormones. Generative organs tend to become dominant sinks exerting strong ‘priority demand’ both for photosynthates and ions. Developing fruits also monopolize hormones (Herzog, 1986), including cytokinins, major endogenous senescence retardants, creating even in some cases deficiency in the leaves (Nooden, 1985). Removal of fruits of grape vines leads to a drastically enhanced cytokinin content in the leaves retarding their senescence (Hoad et al., 1977). Partial defoliation of tomato plants greatly increases the zeatin content of the fruits and even more in the seeds (Monseline et al., 1978; Varga and Bruinsma, 1976).

1 citations

Journal Article
TL;DR: The stagheads in Brassica juncea vars showed lower levels of indole-3-acetic acid and higher levels of gibberellic acid, zeatin and abscisic acid as compared with healthy inflorescences.
Abstract: The stagheads (malformed inflorescences) in Brassica juncea vars. RL-1359, RLM-619 and Brassica campestris var. TL-15 caused by Albugo Candida (Pers. ex Lev.) Kuntze showed lower levels of indole-3-acetic acid and higher levels of gibberellic acid, zeatin and abscisic acid as compared with healthy inflorescences.

1 citations

Journal ArticleDOI
TL;DR: The higher activity of thiozeatin than zeatin in this system may reside in the resistance of thIOzeatin to enzymatic attack, as P. vulgaris tissues contain an enzyme system capable of cleaving off unsaturated side chains of cytokinins.

1 citations

Journal ArticleDOI
TL;DR: In this article , the Andean mortiño (Vaccinium floribundum Kunth) grows wild in the northern paramos of South América.
Abstract: The Andean mortiño (Vaccinium floribundum Kunth) grows wild in the northern paramos of South América. The berries present potential opportunities for agribusiness, but an efficient technology for the production of plants and berries is required. On the other hand, the development of plant production methods from mortiño seeds will allow the plants’ accessibility and its potential use in breeding programs. The objective of this study was to develop an efficient in vitro protocol for accelerated production using seeds. We carried out the research in four phases: seed germination, plant multiplication, rooting, and acclimatization in the greenhouse. For in vitro seed germination, we studied the effect of two culture media [woody plant medium (WPM) and Murashige and Skoog medium (MS], two photoperiods (16 and 24 hours of light), and two temperatures (18 and 28 °C). The best treatment was found to be WPM + 24 h light + 18 °C. In the micropropagation of seedlings, the effect of two concentrations of three cytokinines [(trans-zeatin riboside (TZR), zeatin (ZEA), and 2-isopentenyl adenine (2iP)], and two photoperiods (16 and 0 h light) was evaluated, whereby the concentration of 0.5 mg L −1 of TZR was the best treatment. For rooting, two doses of three auxins [indole-3-butyric acid (IBA), 1-naphthaleneacetic acid (NAA), and indole-3-acetic acid (IAA)] were evaluated, resulting in the 2 mg·L −1 concentration of IBA giving the best root induction. Finally, the in vitro rooted plants were acclimatized in a greenhouse. We found that peat was the best substrate. These results show that the technology developed here is useful for in vitro production of V. floribundum using seeds.

1 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202333
2022103
202135
202034
201932
201848