Search results for "Polyploïdie"

showing 2 items of 2 documents

A Peptidoglycan-Remodeling Enzyme Is Critical for Bacteroid Differentiation in Bradyrhizobium spp. During Legume Symbiosis.

2016

International audience; In response to the presence of compatible rhizobium bacteria, legumes form symbiotic organs called nodules on their roots. These nodules house nitrogen-fixing bacteroids that are a differentiated form of the rhizobium bacteria. In some legumes, the bacteroid differentiation comprises a dramatic cell enlargement, polyploidization, and other morphological changes. Here, we demonstrate that a peptidoglycan-modifying enzyme in Bradyrhizobium strains, a DD-carboxypeptidase that contains a peptidoglycan-binding SPOR domain, is essential for normal bacteroid differentiation in Aeschynomene species. The corresponding mutants formed bacteroids that are malformed and hypertrop…

0301 basic medicinePhysiology[SDV]Life Sciences [q-bio]Mutantnodosité racinairechemistry.chemical_compoundBacteroidesBradyrhizobiumPhotosynthesisPhotosynthèseDifférenciation cellulaire2. Zero hungerhttp://aims.fao.org/aos/agrovoc/c_2603http://aims.fao.org/aos/agrovoc/c_6094food and beveragesFabaceaeGeneral MedicinePolyploïdieCode génétiqueRhizobiumhttp://aims.fao.org/aos/agrovoc/c_3215Symbiosihttp://aims.fao.org/aos/agrovoc/c_27138F60 - Physiologie et biochimie végétaleSymbioseBacterial Proteinhttp://aims.fao.org/aos/agrovoc/c_772PeptidoglycanBiologyBradyrhizobiumMicrobiology03 medical and health sciencesPhotosynthesiBacterial ProteinsSymbiosisPeptidaseSymbiosishttp://aims.fao.org/aos/agrovoc/c_7563Binding Sites[ SDV ] Life Sciences [q-bio]Binding SiteP34 - Biologie du solAeschynomeneGene Expression Regulation Bacterialbiology.organism_classificationhttp://aims.fao.org/aos/agrovoc/c_27601http://aims.fao.org/aos/agrovoc/c_5014030104 developmental biologychemistryEnzymeMutationhttp://aims.fao.org/aos/agrovoc/c_5812http://aims.fao.org/aos/agrovoc/c_5690PeptidoglycanBacteroidesAgronomy and Crop ScienceBacteriahttp://aims.fao.org/aos/agrovoc/c_2265
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Ploidy manipulation and citrus breeding, genetics and genomics

2020

Polyploidy appears to have played a limited role in citrus germplasm evolution. However, today, ploidy manipulation is an important component of citrus breeding strategies. For varieties, the main objective is to develop triploid seedless cultivars. For rootstock, the aim is to cumulate interesting traits in tetraploid hybrids and to improve adaptation to biotic and abiotic stresses. This chapter starts with a review of the recent knowledge acquired on the natural mechanisms of citrus polyploidization and tetraploid meiosis. Chromosome doubling of nucellar cells is frequent in apomictic citrus and results in tetraploid seedling production. Unreduced gametes are also frequently produced, mai…

GermplasmCitrusGenomicsBiologyGenomeF30 - Génétique et amélioration des plantesgénomiquehttp://aims.fao.org/aos/agrovoc/c_49902PolyploidApomixisCitrus Genome BreedingGénétiquehttp://aims.fao.org/aos/agrovoc/c_3222Hybridamélioration génétiqueGeneticshttp://aims.fao.org/aos/agrovoc/c_1637fungihttp://aims.fao.org/aos/agrovoc/c_6094food and beverageshttp://aims.fao.org/aos/agrovoc/c_92382PolyploïdieAmélioration des plantesSettore AGR/03 - Arboricoltura Generale E Coltivazioni Arboreehttp://aims.fao.org/aos/agrovoc/c_5956Doubled haploidyPloidy
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