Publications by authors named "Alejandro S Escandon"
Polyploidy, defined as the coexistence of three or more complete sets of chromosomes in an organism's cells, is considered as a pivotal moving force in the evolutionary history of vascular plants and has played a major role in the domestication of several crops. In the last decades, improved cultivars of economically important species have been developed artificially by inducing autopolyploidy with chemical agents. Studies on diverse species have shown that the anatomical and physiological changes generated by either natural or artificial polyploidization can increase tolerance to abiotic and biotic stresses as well as disease resistance, which may positively impact on plant growth and net production.
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- UV-B radiation is crucial for plant growth and development, activating specific and nonspecific response pathways.
- The UVR8 receptor, initially inactive as a dimer, becomes active upon UV-B exposure, interacting with COP1 to prevent degradation of the transcription factor HY5, thereby triggering photomorphogenic responses.
- While much is known about UVR8 in Arabidopsis, this study highlights differences in UV-B responses across species, noting that UVR8’s role extends beyond UV-B reactions to other developmental and stress responses.
Sunflower (Helianthus annuus L.) is still considered as a recalcitrant species to in vitro culture and transformation in spite of the publication of different protocols. Here we describe a routine transformation system of this crop which requires mature HA89 genotype seeds and Agrobacterium tumefaciens EHA105 strain for gene delivery, being both easily available.
View Article and Find Full Text PDFSix Nierembergia linariaefolia clones were selected for ornamental traits during a native germplasm development program. For fingerprinting diagnosis, 13 anchored inter-simple sequence repeat (ISSR) primers and 6 amplified fragment length polymorphism (AFLP) primer-enzyme combinations were used. Both markers revealed high levels of polymorphism, enabling genetic discrimination of the accessions analyzed by using 443 informative ISSRs and 541 AFLP markers.
View Article and Find Full Text PDFSunflower (Helianthus annuus L.) is considered one of the recalcitrant species in terms of transformation and regeneration. A routine transformation system of this crop requires competent cell cultures for efficient plant regeneration as well as an effective method for gene delivery.
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