Modulation of germination of embryos isolated from dormant and nondormant barley grains by manipulation of endogenous abscisic acid

Wang, Mei; Heimovaara-Dijkstra, S.; Duijn, Bert van

doi:10.1007/bf00195719

Cited by 110 publications

(114 citation statements)

References 27 publications

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“…For example, Weidner et al (1993) demonstrated a relationship between phenolic acids and barley dormancy with an increase in total and free phenolic acid content coinciding with the pattern of dormancy after flowering and post ripening. In addition it was demonstrated that ferulic and sinapic acid retarded germination of ripening barley embryos, and Wang et al (1995) showed that an increased level of hydrogen peroxide reduced the inhibitory effect of ABA. The biochemistry of dormancy is complex and covered in a large and diverse literature.…”

Section: Dormancymentioning

confidence: 99%

Molecular basis of barley quality

Fox¹,

Panozzo²,

Li³

et al. 2003

Aust. J. Agric. Res.

162

163

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Abstract. The quality of barley for the range of end uses from animal feed to brewing is determined by many genes, making the breeding of new barley varieties difficult. Understanding of the molecular basis of barley quality has been advanced by biochemical studies. More recently, molecular genetic tools are allowing the analysis of the biochemical factors contributing to grain quality. Many genetic loci influencing key quality attributes have been identified by gene mapping. Limited success has been reported in using this information to select for quantitative trait loci for these quality traits in plant breeding. Genomic techniques allowing more detailed analysis of variations in the barley genome in relation to quality promise to extend significantly the value of molecular genetic approaches to barley quality improvement. Definition of the genetic basis of malting quality requires the identification of the genes involved in germination and endosperm modification. Feed quality remains difficult to define. Recent advances are likely to accelerate the rate of discovery, providing new options for analysis of barley quality.

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Section: Dormancymentioning

confidence: 99%

Molecular basis of barley quality

Fox¹,

Panozzo²,

Li³

et al. 2003

Aust. J. Agric. Res.

162

163

View full text Add to dashboard Cite

show abstract

“…For starchy mono-cotyledons, the seeds of barley and wild oat were most frequently studied (for example Dyer 1993;Wang et al 1995;Han et al 1996). For the studies of the dormancy control in oily annuals, lettuce achenes (e.g., Fountain and Bewley 1973;Hsiao and Vidaver 1989) and sunflower seeds (e.g., Srivastava and Dey 1982;Gay et al 1991) were used, whereas apple seeds, in parallel to hazel (e.g., Jarvis et al 1968) and Acer (e.g., Pinfield and Dungey 1985), seem to be the most extensively investigated model material for studies of dormancy in oily perennial dicotyledonous seeds.…”

Section: Germination and Dormancy In Seedsmentioning

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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“…Instead, responsiveness of isolated embryos to exogenous ABA is highly correlated with dormancy expressed in the intact grains from several species, such as wheat (Walker-Simmons, 1987;Morris et al, 1989;Gerjets et al, 2010), barley (Wang et al, 1995;Benech-Arnold et al, 1999Leymarie et al, 2008;Barrero et al, 2009), oat (Corbineau et al, 1991, sorghum (Steinbach et al, 1995) and rice (Gianinetti and Vernieri, 2007). Different embryo sensitivity to ABA can result from differential signalling activity or efficiency of molecular components of the ABA signal transduction pathway, although differential catabolism rates might also affect embryo responsiveness to exogenous ABA (Benech-Arnold et al, 2006).…”

Section: Hormonal Regulation Of Dormancymentioning

confidence: 99%

“…The expression of dormancy in barley and oat grains is associated with maintenance of a higher ABA content, while embryo ABA decreases sharply in non-dormant grains or dormant ones placed in conditions that do not allow expression of dormancy (Ried and WalkerSimmons, 1990;Wang et al, 1995;Jacobsen et al, 2002;Benech-Arnold et al, 2006;Millar et al, 2006;Leymarie et al, 2008;Hoang et al, 2013b). However, ABA metabolism is also modulated by grain moisture content.…”

Section: Watermentioning

confidence: 99%

Dormancy in cereals (not too much, not so little): about the mechanisms behind this trait

et al. 2015

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As in other cultivated species, dormancy can be seen as a problem in cereal production, either due to its short duration or to its long persistence. Indeed, cereal crops lacking enough dormancy at harvest can be exposed to pre-harvest sprouting damage, while a long-lasting dormancy can interfere with processes that rely on rapid germination, such as malting or the emergence of a uniform crop. Because the ancestors of cereal species evolved under very diverse environments worldwide, different mechanisms have arisen as a way of sensing an appropriate germination environment (a crucial factor for winter or summer annuals such as cereals). In addition, different species (and even different varieties within the same species) display diverse grain morphology, allowing some structures to impose dormancy in some cereals but not in others. As in seeds from many other species, the antagonism between the plant hormones abscisic acid and gibberellins is instrumental in cereal grains for the inception, expression, release and re-induction of dormancy. However, the way in which this antagonism operates is different for the various species and involves different molecular steps as regulatory sites. Environmental signals (i.e. temperature, light quality and quantity, oxygen levels) can modulate this hormonal control of dormancy differently, depending on the species. The practical implications of knowledge accumulated in this field are discussed.

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Modulation of germination of embryos isolated from dormant and nondormant barley grains by manipulation of endogenous abscisic acid

Cited by 110 publications

References 27 publications

Molecular basis of barley quality

Molecular basis of barley quality

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

Dormancy in cereals (not too much, not so little): about the mechanisms behind this trait

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