Interaction of ethephon with cytokinin and gibberellin during the removal of apple seed dormancy and germination of embryos

Sińska, Irena

doi:10.1016/0168-9452(89)90149-0

Cited by 22 publications

(16 citation statements)

References 16 publications

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“…thermo-inhibition was overcome after treatment with tDZ in line with Berrie et al (3) who indicated that thermoinhibition of celery seeds is associated with the accumulation of a germination inhibitor which interacts with cytokinins and could be overcome by treatment with red light or aplication of cytokinins or giberellins. Sinska (18) also found that BA and GA 3 counteracted the inhibitory effect of Aminooxy acetic acid (AoA) and aminoethoxyvinylglycine (AVG) on embryo germination. he further emphasised that the effect of ethylene on the removal of embryonal dormancy is related to the action of BA but not GA 3 .…”

Section: Resultsmentioning

confidence: 97%

Breaking Seed Dormancy of Water Lily (Nymphaea AlbaL.) UnderIn VitroConditons

Sumlu

Atar

Khawar

2010

Biotechnology & Biotechnological Equipment

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Water lily (Nymphaea alba L.) is an important and popular aquatic perenniel plant. It has been used for ornamental and pharmaceutical purposes in Turkey and various countries. The populations of white water lily have seen rapid erosion in the last few years due to fast urbanization and industrialization that has produced negative effect on the lily's habitats. It is multiplied vegetatively primarily through rhizomes, which produce uniform populations. Multiplication of plants through seeds helps to maintain genetic variability that could be easily used to preserve the species in an effective way. Multiplication of plants through seeds is difficult due to development of dormancy with the passage of time. The results of the study showed that the fresh seeds of the species gave highest germination on MS medium containing 1 mg/l BAP + 0.1 mg/l IAA. However, the seeds that were stored for five months at 4 0 C failed to germinate on medium containing 1 mg/l BAP + 0.1 mg/l IAA, either used alone or combined with sucrose, IBA and GA 3 in different concentrations in the germination medium. After five months these seeds could be germinated only on germination medium that contained 0.05 to 4 mg/l TDZ, with highest germination on 2 mg/l TDZ with germination frequency of 51.37%. No significant variation on germination was recorded in the light or dark; however, the seed germinated in the dark produced 2-3 times longer seedlings compared to those germinated under 16 h light photoperiod. This study signifies the role of TDZ to break the dormancy of N. alba seeds. As such the results indicate that TDZ could be used effectively to propagate N. alba from seeds which could help to conserve and multiply this plant species at its natural habitat.

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Section: Resultsmentioning

confidence: 97%

Breaking Seed Dormancy of Water Lily (Nymphaea AlbaL.) UnderIn VitroConditons

Sumlu

Atar

Khawar

2010

Biotechnology & Biotechnological Equipment

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“…Ethylene at 1.25 μL L -1 allows 100% germination of dormant Arabidopsis seeds incubated at 25°C in darkness, when dormant sunflower seeds required 12.5 μL L -1 to fully germinate at 15°C. Breaking of dormancy during chilling of apple seeds, or during dry storage of sunflower achenes, results in an increasing sensitivity to ethylene (Sinska, 1989; Corbineau and Côme, 2003). In Stylosanthes humilis , non-dormant seeds are at least 50-fold more sensitive to ethylene than freshly harvested dormant ones (Ribeiro and Barros, 2006).…”

Section: Ethylene Biosynthesis Signaling and Aba Crosstalk In Seed mentioning

confidence: 99%

ABA crosstalk with ethylene and nitric oxide in seed dormancy and germination

Arc¹,

Sechet²,

Corbineau³

et al. 2013

Front. Plant Sci.

231

234

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Dormancy is an adaptive trait that enables seed germination to coincide with favorable environmental conditions. It has been clearly demonstrated that dormancy is induced by abscisic acid (ABA) during seed development on the mother plant. After seed dispersal, germination is preceded by a decline in ABA in imbibed seeds, which results from ABA catabolism through 8′-hydroxylation. The hormonal balance between ABA and gibberellins (GAs) has been shown to act as an integrator of environmental cues to maintain dormancy or activate germination. The interplay of ABA with other endogenous signals is however less documented. In numerous species, ethylene counteracts ABA signaling pathways and induces germination. In Brassicaceae seeds, ethylene prevents the inhibitory effects of ABA on endosperm cap weakening, thereby facilitating endosperm rupture and radicle emergence. Moreover, enhanced seed dormancy in Arabidopsis ethylene-insensitive mutants results from greater ABA sensitivity. Conversely, ABA limits ethylene action by down-regulating its biosynthesis. Nitric oxide (NO) has been proposed as a common actor in the ABA and ethylene crosstalk in seed. Indeed, convergent evidence indicates that NO is produced rapidly after seed imbibition and promotes germination by inducing the expression of the ABA 8′-hydroxylase gene, CYP707A2, and stimulating ethylene production. The role of NO and other nitrogen-containing compounds, such as nitrate, in seed dormancy breakage and germination stimulation has been reported in several species. This review will describe our current knowledge of ABA crosstalk with ethylene and NO, both volatile compounds that have been shown to counteract ABA action in seeds and to improve dormancy release and germination.

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“…It has been established that spermine counteracts the production of ethylene in apple seeds (Sińska and Lewandowska 1991). Gibberellin and cytokinin treatments stimulated ethylene production in cultured isolated embryos, and the inhibition of embryo germination by inhibitors of ethylene synthesis (aminoxyacetic acid and aminoethoxyvinylglycine) was counteracted by GA 3 and CK (Sińska 1989). Ethylene synthesis is also stimulated by nitric oxide treatment of embryos, and inhibitors of ethylene synthesis reversed the NO-induced stimulation of germination (Gniazdowska et al 2007).…”

Section: Regulatory Complex Involved In Dormancy Removalmentioning

confidence: 99%

Metabolic control of embryonic dormancy in apple seed: seven decades of research

Lewak

2010

Acta Physiol Plant

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Embryonic dormancy is defined as a set of blocks imposed upon a process(es) cardinal for growth. In apple seeds, all these blocks are removed as a result of cold treatment (stratification), but some of them are also affected by light and/or hormonal treatments. This review summarizes published data related to the modes of action of above factors on the changes in the levels of endogenous hormones and some other plant growth regulators (e.g., hydrogen cyanide), and on certain enzymes involved in mobilization of seed reserves and catabolism of their hydrolysis products. Phytochrome and activities of acid lipase and a protease have been indicated as receptors of light and low temperature, respectively. Several chains of events initiated by these two environmental factors and leading to dormancy removal are proposed, and the sites of their control by hormones and HCN are indicated. These chains are postulated to contribute to the elimination of particular blocks that hinder germination and therefore to be involved in the mechanisms of dormancy breakage.

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Interaction of ethephon with cytokinin and gibberellin during the removal of apple seed dormancy and germination of embryos

Cited by 22 publications

References 16 publications

Breaking Seed Dormancy of Water Lily (Nymphaea AlbaL.) UnderIn VitroConditons

Breaking Seed Dormancy of Water Lily (Nymphaea AlbaL.) UnderIn VitroConditons

ABA crosstalk with ethylene and nitric oxide in seed dormancy and germination

Metabolic control of embryonic dormancy in apple seed: seven decades of research

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