Tetraploidy Enhances Boron-Excess Tolerance in Carrizo Citrange (Citrus sinensis L. Osb. × Poncirus trifoliata L. Raf.)
| Autor: | Marta Ruiz, Pablo Aleza, Luis Navarro, Mary-Rus Martínez-Cuenca, Anna Quinones, Belén Martínez-Alcántara, Eduardo Primo-Millo, Raphaël Morillon |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine BOR1 F62 - Physiologie végétale - Croissance et développement Plant Science Poncirus trifoliata F50 - Anatomie et morphologie des plantes 01 natural sciences F30 - Génétique et amélioration des plantes Porte greffe Original Research food and beverages Citrange Polyploïdie Physiologie végétale Anatomie végétale Tolérance Ploidy Casparian strip Rootstock Citrus × sinensis Citrus sinensis F60 - Physiologie et biochimie végétale 4x Hybridation intergénérique lcsh:Plant culture poliploidy Biology citrus 03 medical and health sciences Polyploid Exodermis Botany casparian band Bore lcsh:SB1-1110 Tétraploïdie Citrus rootstock Greffage NIP5 Morphologie végétale polyploid rootstock biology.organism_classification 030104 developmental biology Plantule H50 - Troubles divers des plantes 010606 plant biology & botany |
| Zdroj: | Frontiers in Plant Science BASE-Bielefeld Academic Search Engine Frontiers in Plant Science, Vol 7 (2016) |
| ISSN: | 1664-462X |
| DOI: | 10.3389/fpls.2016.00701 |
| Popis: | Tetraploidy modifies root anatomy which may lead to differentiated capacity to uptake and transport mineral elements. This work provides insights into physiological and molecular characters involved in boron (B) toxicity responses in diploid (2x) and tetraploid (4x) plants of Carrizo citrange (Citrus sinensis L. Osb. × Poncirus trifoliata L. Raf.), a widely used citrus rootstock. With B excess, 2x plants accumulated more B in leaves than 4x plants, which accounted for their higher B uptake and root-to-shoot transport rates. Ploidy did not modify the expression of membrane transporters NIP5 and BOR1 in roots. The cellular allocation of B excess differed between ploidy levels in the soluble fraction, which was lower in 4x leaves, while cell wall-linked B was similar in 2x and 4x genotypes. This correlates with the increased damage and stunted growth recorded in the 2x plants. The 4x roots were found to have fewer root tips, shorter specific root length, longer diameter, thicker exodermis and earlier tissue maturation in root tips, where the Casparian strip was detected at a shorter distance from the root apex than in the 2x roots. The results presented herein suggest that the root anatomical characters of the 4x plants play a key role in their lower B uptake capacity and root-to-shoot transport. Highlights Tetraploidy enhances B excess tolerance in citrange Carrizo Expression of NIP5 and BOR1 transporters and cell wall-bounded B are similar between ploidies B tolerance is attributed to root anatomical modifications induced by genome duplication The rootstock 4x citrange carrizo may prevent citrus trees from B excess. |
| Databáze: | OpenAIRE |
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