Influence of the Testa on Seed Dormancy, Germination, and Longevity in Arabidopsis

Debeaujon, Isabelle; Léon‐Kloosterziel, Karen M.; Koornneef, M.

doi:10.1104/pp.122.2.403

Cited by 770 publications

(723 citation statements)

References 42 publications

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“…However, the molecular mechanism of seed vigor is unclear. During the past decades, considerable efforts 20 have been made to disclose the mechanisms of the underlying characteristics of seed storability and seed vigor (Debeaujon, Leon-Kloosterziel & Koornneef 2000;Clerkx 27 et al 2003;Rosnoblet et al 2007;Oge et al 2008;Shin, Kim & An 2009;Waterworth et al 2010). In this study, we show that the transcripts of MT2a, MT2b…”

Section: Both Mt2a and Mt3 Are Important For Seed Germination Vigormentioning

confidence: 49%

Overexpression of Nelumbo nucifera metallothioneins 2a and 3 enhances seed germination vigor in Arabidopsis

Zhou

Chu

Chen

et al. 2011

Planta

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Section: Both Mt2a and Mt3 Are Important For Seed Germination Vigormentioning

confidence: 49%

Overexpression of Nelumbo nucifera metallothioneins 2a and 3 enhances seed germination vigor in Arabidopsis

Zhou

Chu

Chen

et al. 2011

Planta

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“…Les plus importants sont la nutrition de l'embryon [15] et la taille de la graine [16,17]. En outre, des mutants de forme ou de couleur des téguments (mutants transparent testa, tt) (figure 2 D) montrent une dormance et une viabilité réduite ainsi qu'une perméabilité aux solutés augmentée [18]. Un crible visuel de recherche de mutants de coloration de la graine a été mené dans la collection de mutants d'insertion.…”

Section: Mutant De Tégumentsunclassified

NORD : IMPACTS DES BIOTECHNOLOGIES RECHERCHES Approches moléculaires de la qualité et du développement des graines

Dubreucq¹,

Grappin²,

Miquel³

et al. 2001

OCL

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Résumé :Les semences constituent le maillon essentiel de la production végétale car elles sont à la fois le vecteur de la multiplication des plantes et la source de denrées alimentaires. L'agriculture moderne exige le respect des critères de qualité des semences qui ne sont évidemment pas les mêmes suivant que l'utilisation des semences sera alimentaire, industrielle ou de simple semis. Du point de vue alimentaire ou industriel, la qualité se définit en fonction de la nature et du rendement de l'extraction du produit d'intérêt. Lorsque la graine est utilisée comme semence, la qualité est appréciée suivant des critères qui sont la conformité génétique, l'état sanitaire et la capacité germinative. Les normes qualitatives alors retenues concourent à l'obtention de peuplements homogènes et vigoureux. La semence idéale doit évidemment combiner ces différents critères de qualité. Les bases biologiques qui sous-tendent la plupart des critères de qualité sont encore très mal connues et leur élucidation demeure un défi scientifique majeur. Summary : Seeds are essential for plant propagation and crop production and must satisfy the increasingly diverse requirements of both modern agriculture and the agro-industry. The biological bases of seed quality are still poorly understood. Progress in this area will no doubt emerge from the identification of genes that control quality parameters, through the tremendous advances made using genomic based techniques. In this way, the use of 50,000 Arabidopsis thaliana T-DNA mutant lines, developed in France, at the Inra Versailles has enabled us to isolate genes whose functions are essential for seed development and maturation, e.g. storage compound synthesis and deposition, and tegument composition. Mutants have been isolated that are either strongly impaired in protein glycosylation (glycosidase I mutant) or whose lipid composition is modified (diacylglycerol acyltransferase: DGAT mutant). The corresponding cloned genes should prove useful in biotechnological applications for the reduction of the allergenicity of engineered proteins produced in plants and for modifying seed lipid composition respectively. New Transparent Testa genes have also been obtained that play a role in the control of pigment deposition in the seed testa. Engineering the composition of seed coats is a real challenge for the improvement of the nutritional value of seeds for animal feeding. The zeaxanthin epoxidase gene has been cloned, as this is required for the biosynthesis of the hormone abscisic acid (ABA). Using this gene it has been possible to Article disponible sur le site http://www.ocl-journal.org ou http://dx

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“…Seed dormancy and PHS in Arabidopsis, wheat, barley, rice, and sorghum are expressed as quantitative traits that are strongly inXuenced by environments as well as interactions between genotype and environment (Alonso-Blanco et al 2003;Anderson et al 1993;Gu et al 2004;Kato et al 2001;Lijavetzky et al 2000). Red color pericarp/testa has been associated with longer seed dormancy and/or PHS resistance in crops, and red grain wheat usually has a higher level of PHS resistance than white wheat (Debeaujon et al 2000;Gfeller and Svejda 1960;Seshu and Sorrells 1986). Therefore, PHS resistance also has been associated with the red grain color genes (Red), and red grain color has been used as a marker to select for PHS-resistant wheat in some wheat breeding programs (Gale and Leuton 1987;Gfeller and Svejda 1960;Groos et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Quantitative trait loci for resistance to pre-harvest sprouting in US hard white winter wheat Rio Blanco

et al. 2008

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Pre-harvest sprouting (PHS) of wheat is a major problem that severely limits the end-use quality of Xour in many wheat-growing areas worldwide. To identify quantitative trait loci (QTLs) for PHS resistance, a population of 171 recombinant inbred lines (RILs) was developed from the cross between PHS-resistant white wheat cultivar Rio Blanco and PHS-susceptible white wheat breeding line NW97S186. The population was evaluated for PHS in three greenhouse experiments and one Weld experiment. After 1,430 pairs of simple sequence repeat (SSR) primers were screened between the two parents and two bulks, 112 polymorphic markers between two bulks were used to screen the RILs. One major QTL, QPhs.pseru-3AS, was identiWed in the distal region of chromosome 3AS and explained up to 41.0% of the total phenotypic variation in three greenhouse experiments. One minor QTL, QPhs.pseru-2B.1, was detected in the 2005 and 2006 experiments and for the means over the greenhouse experiments, and explained 5.0-6.4% of phenotypic variation. Another minor QTL, QPhs.pseru-2B.2, was detected in only one greenhouse experiment and explained 4.5% of phenotypic variation for PHS resistance. In another RIL population developed from the cross of Rio Blanco/NW97S078, QPhs.pseru-3AS was signiWcant for all three greenhouse experiments and the means over all greenhouse experiments and explained up to 58.0% of phenotypic variation. Because Rio Blanco is a popular parent used in many hard winter wheat breeding programs, SSR markers linked to the QTLs have potential for use in high-throughput marker-assisted selection of wheat cultivars with improved PHS resistance as well as Wne mapping and map-based cloning of the major QTL QPhs.pseru-3AS.

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Influence of the Testa on Seed Dormancy, Germination, and Longevity in Arabidopsis

Cited by 770 publications

References 42 publications

Overexpression of Nelumbo nucifera metallothioneins 2a and 3 enhances seed germination vigor in Arabidopsis

Overexpression of Nelumbo nucifera metallothioneins 2a and 3 enhances seed germination vigor in Arabidopsis

NORD : IMPACTS DES BIOTECHNOLOGIES RECHERCHES Approches moléculaires de la qualité et du développement des graines

Quantitative trait loci for resistance to pre-harvest sprouting in US hard white winter wheat Rio Blanco

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