Post-Genomics Studies of Developmental Processes in Legume Seeds

Thompson, Richard; Burstin, Judith; Gallardo, Karine

doi:10.1104/pp.109.143966

Cited by 38 publications

(33 citation statements)

References 48 publications

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“…Notable examples of such approaches include the identification of novel genes and transcriptional networks and the isolation of molecular physiological aspects governing seed development in barley (Hordeum vulgare; Sreenivasulu et al, 2010;Kohl et al, 2012;Thiel et al, 2012aThiel et al, , 2012b, Arabidopsis (Arabidopsis thaliana; Santos-Mendoza et al, 2008), and legumes (Le et al, 2007;Thompson et al, 2009). Such studies have also facilitated the enhanced understanding of comparative seed development programs in monocots and dicots (Suzuki and McCarty, 2008;Sreenivasulu and Wobus, 2013) and, more broadly, in angiosperms and gymnosperms (Linkies et al, 2010).…”

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confidence: 99%

Phenotypic and Transcriptional Analysis of Divergently Selected Maize Populations Reveals the Role of Developmental Timing in Seed Size Determination

et al. 2014

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Seed size is a component of grain yield and an important trait in crop domestication. To understand the mechanisms governing seed size in maize (Zea mays), we examined transcriptional and developmental changes during seed development in populations divergently selected for large and small seed size from Krug, a yellow dent maize cultivar. After 30 cycles of selection, seeds of the large seed population (KLS30) have a 4.7-fold greater weight and a 2.6-fold larger size compared with the small seed population (KSS30). Patterns of seed weight accumulation from the time of pollination through 30 d of grain filling showed an earlier onset, slower rate, and earlier termination of grain filling in KSS30 relative to KLS30. This was further supported by transcriptome patterns in seeds from the populations and derived inbreds. Although the onset of key genes was earlier in small seeds, similar maximum transcription levels were observed in large seeds at later stages, suggesting that functionally weaker alleles, rather than transcript abundance, may be the basis of the slow rate of seed filling in KSS30. Gene coexpression networks identified several known genes controlling cellularization and proliferation as well as novel genes that will be useful candidates for biotechnological approaches aimed at altering seed size in maize and other cereals.

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confidence: 99%

Phenotypic and Transcriptional Analysis of Divergently Selected Maize Populations Reveals the Role of Developmental Timing in Seed Size Determination

et al. 2014

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“…In addition, the protein content of the seeds of M. truncatula accounts between 35 and 45 % and most carbon is stored in the form of oil with a starch content of a b c d Grain legume production in EU countries Fig. 3 Grain legume production in the EU countries (FAO 2012) less than 1 % (Gallardo et al 2003(Gallardo et al , 2006aThompson et al 2009), whilst pea or faba bean store starch as the principal form of carbon. Thus, the resemblance to legume oilseeds as soybean is significant (Jones et al 2010;Allen and Young 2013), wherefore barrel medic can also serve as a model for soybean or other economically important legume species (Barker et al 1990;Gallardo et al 2003;Aghamirzaie et al 2013).…”

Section: The Model Legume Medicago Truncatula Gaertnmentioning

confidence: 99%

“…The seeds comprise three distinct components, i.e. the embryo, which gives the daughter plant; the endosperm that transmits nutrients from the maternal tissues to the embryo during embryogenesis and maturation; and the seed coat, which protects the other tissues and modifies and controls the nutrient supply to the embryo Le et al 2007;Thompson et al 2009;Ochatt 2011;Atif et al 2013a, b;Verdier et al 2013;Abirached-Darmency and Ochatt 2013). Compared to monocots, the endosperm in most dicots is only transient and successively replaced by the growing embryo, wherefore the final seed size is primarily determined by the cotyledon cell number and size (Abirached-Darmency et al 2005;Ochatt 2011;Atif et al 2013a, b;Verdier et al 2013;Abirached-Darmency and Ochatt 2013).…”

Section: Seed Development and The Parallel With In Vitro Embryogenesismentioning

confidence: 99%

Agroecological impact of an in vitro biotechnology approach of embryo development and seed filling in legumes

Ochatt

2014

Agron. Sustain. Dev.

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Ongoing global climatic changes and growing demographic pressure have increased demand for agronomic resources and affected the agroecosystem by provoking a number of abiotic stresses that, added to biotic ones, result in physiological and metabolic disorders. Such stresses ultimately impact yield when it most needs to be improved, and understanding and resolving them is a major scientific and agronomic challenge of this century. However, many species are difficult to breed for stress resistance and improved yield for a number of reasons, ranging from a long life cycle (woody species), a reduced genetic background (most self-fertile, cleistogamous legumes) or conversely extensive heterozygosity resulting from an outbreeding nature, and also due to the mainly multigenic origin of such resistances. Biotechnologybased breeding would be an efficient alternative but, for recalcitrant crops, many attempts at in vitro regeneration met with varying degrees of success and often limited to a few genotypes, hampering exploitation of biotechnology approaches. To reduce the risk of undirected somaclonal variations amongst regenerants and transformants, it is better to produce them through somatic embryogenesis that recognises a single-cell origin but whose feasibility is also limited amongst species. There is also a need to fix the resulting genome once a novelty is obtained to ensure efficient heritability of improved traits acquired, which takes several generations in conventional breeding. Acceleration of generations through flowering and fruit set in vitro has been developed in various species including legumes. Haplo-diploidisation in vitro also offers a unique alternative to conventional methods, as it yields novel genetic combinations following doubling of haplotypes and regeneration of fertile plants having gained homozygosity within a single generation. This review will examine the relationships between embryogenesis, stress and its impact on in vitro development of novel genotypes more apt for a sustainable agriculture.

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“…We anticipate that the pea genome will be completely sequenced within 5 years (Cannon et al 2009), this started with next generation sequencing of the repetitive DNA in the genome of cv "Carrera" by Macas et al (2007). These genomic tools, combined with association mapping and phenotyping Pisum germplasm for climate change adaptation, should result in rapid development of needed cultivars (Thompson et al 2009). …”

Section: Gene Discovery and Masmentioning

confidence: 99%