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http://cicy.repositorioinstitucional.mx/jspui/handle/1003/46| Mechanismsofsalttoleranceinhabaneropepperplants(CapsicumchinenseJacq.):Prolineaccumulation,ionsdynamicsandsodiumroot-shootpartitionandcompartmentation | |
| Manuel Martinez Estevez | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Despiteitseconomicrelevance,littleisknownaboutsalttolerancemechanismsinpepperplants.Toaddressthisquestion,wecompareddifferencesinresponsestoNaClintwoCapsicumchinensevarieties:Rex(tolerant)andChichen-Itza(sensitive).Undersaltstress(150mMNaClover7days)rootsofRexvarietyaccumulated50timesmorecompatiblesolutessuchasprolinecomparedtoChichen-Itza.MineralanalysisindicatedthatNa+isrestrictedtorootsbypreventingitstransporttoleaves.FluorescenceanalysissuggestedanefficientNa+compartmentalizationinvacuole-likestructuresandinsmallintracellularcompartmentsinrootsofRexvariety.Atthesametime,Na+inChichen-Itzaplantswascompartmentalizedintheapoplast,suggestingsubstantialNa+extrusion.RexvarietywasfoundtoretainmoreK+initsrootsundersaltstressaccordingtoamineralanalysisandmicroelectrodeionfluxestimation(MIFE).Vanadate-sensitiveH+effluxwashigherinChichen-Itzavarietyplants,suggestingahigheractivityoftheplasmamembraneH+-ATPase,whichfuelstheextrusionofNa+,and,possibly,alsothere-uptakeofK+.Ourresultssuggestacombinationofstresstolerancemechanisms,inordertoalleviatethesalt-inducedinjury.Furthermore,Na+extrusiontoapoplastdoesnotappeartobeanefficientstrategyforsalttoleranceinpepperplants. | |
| 12-11-2014 | |
| Artículo | |
| BIOLOGÍA Y QUÍMICA | |
| Aparece en las colecciones: | Artículos de Investigación Arbitrados |
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| 32518.pdf | Artículo de Investigación | 7.46 MB | Adobe PDF | Visualizar/Abrir |