6 documents found, page 1 of 1
Modulation of the berry skin transcriptome of cv. tempranillo induced by water ...
Carvalho, Luisa C; Ramos, Miguel J. N.; Faísca-Silva, David; Marreiros, Pedro; Fernandes, João C.; Egipto, Ricardo; Lopes, Carlos M.; Amâncio, SaraClimate change in the Mediterranean area is making summers warmer and dryer. Grapevine (Vitis vinifera L.) is mostly important for wine production in Mediterranean countries, and the variety Tempranillo is one of the most cultivated in Spain and Portugal. Drought decreases yield and quality and causes important economic losses. As full irrigation has negative effects on quality and water is scarce in this regio...
Portuguese wild grapevine genome re-sequencing (Vitis vinifera sylvestris)
Ramos, Miguel J. N.; Coito, João L.; Faísca-Silva, David; Cunha, Jorge; Costa, Maria Manuela Ribeiro; Amâncio, Sara; Rocheta, MargaridaThe first genome of Vitis vinifera vinifera (PN40024), published in 2007, boosted grapevine related studies. While this reference genome is a suitable tool for the overall studies in the field, it lacks the ability to unveil changes accumulated during V. v. vinifera domestication. The subspecies V. v. sylvestris preserves wild characteristics, making it a good material to provide insights into V. v. vinifera do...
RNA editing in inflorescences of wild grapevine unveils association to sex and ...
Ramos, Miguel J. N.; Faísca-Silva, David; Coito, João L.; Cunha, Jorge; Silva, Helena Gomes; Viegas, Wanda; Costa, Maria Manuela Ribeiro; Amâncio, SaraRNA editing challenges the central dogma of molecular biology, by modifying the genetic information at the transcription level. Recent reports, suggesting increased levels of RNA editing in plants, raised questions on the nature and dynamics of such events during development. We here report the occurrence of distinct RNA editing patterns in wild Vitis flowers during development, with twelve possible RNA editing...
Vitis flower types: from the wild to crop plants
Coito, Joao L.; Silva, Helena G.; Ramos, Miguel J. N.; Cunha, Jorge; Eiras-Dias, Jose; Amancio, Sara; Costa, Maria Manuela Ribeiro; Rocheta, MargaridaVitis vinifera can be divided into two subspecies, V. vinifera subsp. vinifera, one of the most important agricultural crops in the world, and its wild ancestor, V. vinifera subsp. sylvestris. Three flower types can be observed: hermaphrodite and female (on some varieties) in vinifera, and male or female flowers in sylvestris. It is assumed that the different flower types in the wild ancestor arose through spec...
Vitis flower sex specification acts downstream and independently of the ABCDE m...
Coito, João L.; Silva, Helena Sofia Gomes; Ramos, Miguel J. N.; Montez, Miguel; Cunha, Jorge; Amâncio, Sara; Costa, Maria M. R.; Rocheta, MargaridaThe most discriminating characteristic between the cultivated Vitis vinifera subsp. vinifera and the wild-form Vitis vinifera subsp. sylvestris is their sexual system. Flowers of cultivars are mainly hermaphroditic, whereas wild plants have female and male individuals whose flowers follow a hermaphroditic pattern during early stages of development and later develop non-functional reproductive organs. In angiosp...
VviAPRT3 and VviFSEX: Two Genes Involved in Sex Specification Able to Distingui...
Coito, João L.; Ramos, Miguel J. N.; Cunha, Jorge; Silva, Helena Sofia Gomes; Amâncio, Sara; Costa, Maria Manuela Ribeiro; Rocheta, MargaridaVitis vinifera vinifera is a hermaphrodite subspecies, while its ancestor, Vitis vinifera sylvestris, is dioecious. We have identified two genes that together allow the discrimination between male, female and hermaphrodite Vitis plants. The sex locus region on chromosome 2 was screened resulting in the discovery of a new gene, VviFSEX. The same screening revealed another gene, VviAPRT3, located in the sex regio...