A Role for Barley CRYPTOCHROME1 in Light Regulation of Grain Dormancy and Germination

Barrero, José M.; Downie, A. Bruce; Xu, Qian; Gubler, Frank

doi:10.1105/tpc.113.121830

Cited by 126 publications

(94 citation statements)

References 58 publications

(85 reference statements)

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“…This finding is related to the average of germination percentage which also decreased in black rice seeds subjected to blue light. In barley, blue light increased abscisic acid level and significantly increased embryo sensitivity to abscisic acid (Hoang et al 2014;Barrero et al 2014). The result of this study indicated that a slight inhibition in seed germination of black rice seeds subjected to blue light was due to either higher level of abscisic acid in the seeds or the sensitivity of embryo to abscisic acid.…”

Section: α-Amylase Activitymentioning

confidence: 54%

EFFECTS OF BLUE LIGHT AND PACLOBUTRAZOL ON SEED GERMINATION, VEGETATIVE GROWTH AND YIELD OF BLACK RICE (Oryza sativa L. 'Cempo Ireng')

Dewi

Agustina²,

Nurmalika³

2017

BIOTROPIA

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Black rice (Oryza sativa L. "Cempo Ireng") is one of local rice varieties in Sleman Regency, Yogyakarta. The black color is caused by high anthocyanin content which is important source of antioxidant. The cultivation of black rice is still limited due to its tall phenotype, long vegetative stage and low productivity compared to white rice. Paclobutrazol is a growth retardant causing dwarfing in several crop plants and reducing lodging. Blue light can improve plant quality. This research was aimed to evaluate the effect of blue light and paclobutrazol on seed germination, vegetative growth and yield of black rice. The results showed that the average of seed germination as well as the activity of α-amylase of seeds subjected to blue light were lower compared to those subjected to sunlight; however, paclobutrazol concentrations did not affect seed germination percentage. The height of rice plants treated with paclobutrazol decreased in accordance with the increase of paclobutrazol concentration. Chlorophyll content and tiller numbers increased by paclobutrazol treatment of 12.5 ppm. Nitrate reductase activity was higher in rice seedlings subjected to blue light compared to those subjected to sunlight. Iron (Fe) content of rice plants treated with 25 or 50 ppm paclobutrazol increased compared to control. It was concluded that paclobutrazol application of 12.5 ppm already reduced plant height. The higher concentration of paclobutrazol applied the greater reduction on plant height was observed. Blue light treatment applied during black rice seed germination slightly reduced germination percentage and α-amylase activity in the germinated seeds. However, blue light treatment combined with paclobutrazol application during black rice seed germination increased chlorophyll content, tiller numbers and Fe content in black rice grain.

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Section: α-Amylase Activitymentioning

confidence: 54%

EFFECTS OF BLUE LIGHT AND PACLOBUTRAZOL ON SEED GERMINATION, VEGETATIVE GROWTH AND YIELD OF BLACK RICE (Oryza sativa L. 'Cempo Ireng')

Dewi

Agustina²,

Nurmalika³

2017

BIOTROPIA

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“…This is in contrast to dicot species, for which there is strong evidence for phytochrome-mediated regulation of germination, and blue light appears to have no effects on imbibing seeds (Barrero et al, 2014) or are restricted to imbibition conditions during which dormancy is M.V. Rodríguez et al 110 strongly expressed, as reported for lettuce (Small et al, 1979).…”

Section: Lightmentioning

confidence: 82%

“…As in Arabidopsis (Seo et al, 2006), the down-regulation of HvGA3ox2 by blue light might result from the increase in ABA content. Results obtained by Barrero et al (2014) using transgenic lines down-regulating genes encoding the blue light receptor cryptochrome (HvCRY1 and HvCRY2), and the partial reversion of the inhibitory effect of blue light by green light (Hoang et al, 2014), demonstrate that the hormonal regulation by blue light is mediated by cryptochrome CRY1 photoreceptor. The blue light response has been suggested to play a significant ecophysiological role, mediating germination responses based on the extent of exposure of the grain to light (Barrero et al, 2012).…”

Section: Lightmentioning

confidence: 99%

“…dormancy is expressed) at lower temperatures (Simpson, 1990;Benech-Arnold et al, 2003). Dormant grains can also be very sensitive to other factors that inhibit germination, such as oxygen deprivation (Corbineau and Cô me, 1980;Corbineau et al, 1981Corbineau et al, , 1986Lenoir et al, 1983Lenoir et al, , 1986Bradford et al, 2007Bradford et al, , 2008, low water potential of the medium (Corbineau and Cô me, 1996) and exposure to light, in particular blue light (Chaussat and Zoppolo, 1983;Gubler et al, 2008;Jacobsen et al, 2013;Barrero et al, 2014;Hoang et al, 2014).…”

Section: Environmental Factors and Dormancy Expression Induction Andmentioning

confidence: 99%

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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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“…Conversely the inhibition by blue light implies that cryptochromes or phototropins are playing a role. Absence of red light involvement together with inhibition of seed germination by blue light has also been reported in wheat and barley, species that like subterranean clover have been domesticated, and for a much longer period, while in the non-domesticated grass Brachypodium distachyon final germination was found to be strongly enhanced by red light (Barrero et al, 2012(Barrero et al, , 2014.…”

Section: Imbibed Seeds Experimentsmentioning

confidence: 96%

Effects of dark or of red, blue or white light on germination of subterranean clover seeds

Costa¹,

Dias²,

Grenho³

et al. 2016

Emir. J. Food Agric

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A Role for Barley CRYPTOCHROME1 in Light Regulation of Grain Dormancy and Germination

Cited by 126 publications

References 58 publications

EFFECTS OF BLUE LIGHT AND PACLOBUTRAZOL ON SEED GERMINATION, VEGETATIVE GROWTH AND YIELD OF BLACK RICE (Oryza sativa L. 'Cempo Ireng')

EFFECTS OF BLUE LIGHT AND PACLOBUTRAZOL ON SEED GERMINATION, VEGETATIVE GROWTH AND YIELD OF BLACK RICE (Oryza sativa L. 'Cempo Ireng')

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

Effects of dark or of red, blue or white light on germination of subterranean clover seeds

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