24 research outputs found
Expression patterns of Passiflora edulis APETALA1/FRUITFULL homologues shed light onto tendril and corona identities
Abstract Background Passiflora (passionflowers) makes an excellent model for studying plant evolutionary development. They are mostly perennial climbers that display axillary tendrils, which are believed to be modifications of the inflorescence. Passionflowers are also recognized by their unique flower features, such as the extra whorls of floral organs composed of corona filaments and membranes enclosing the nectary. Although some work on Passiflora organ ontogeny has been done, the developmental identity of both Passiflora tendrils and the corona is still controversial. Here, we combined ultrastructural analysis and expression patterns of the flower meristem and floral organ identity genes of the MADS-box AP1/FUL clade to reveal a possible role for these genes in the generation of evolutionary novelties in Passiflora. Results We followed the development of structures arising from the axillary meristem from juvenile to adult phase in P. edulis. We further assessed the expression pattern of P. edulis AP1/FUL homologues (PeAP1 and PeFUL), by RT-qPCR and in situ hybridization in several tissues, correlating it with the developmental stages of P. edulis. PeAP1 is expressed only in the reproductive stage, and it is highly expressed in tendrils and in flower meristems from the onset of their development. PeAP1 is also expressed in sepals, petals and in corona filaments, suggesting a novel role for PeAP1 in floral organ diversification. PeFUL presented a broad expression pattern in both vegetative and reproductive tissues, and it is also expressed in fruits. Conclusions Our results provide new molecular insights into the morphological diversity in the genus Passiflora. Here, we bring new evidence that tendrils are part of the Passiflora inflorescence. This points to the convergence of similar developmental processes involving the recruitment of genes related to flower identity in the origin of tendrils in different plant families. The data obtained also support the hypothesis that the corona filaments are likely sui generis floral organs. Additionally, we provide an indication that PeFUL acts as a coordinator of passionfruit development
O pessegueiro em pomar compacto. IX. dez anos de produção de cultivares sob poda drástica bienal
Análise interactômica da VDAC (voltage-dependent anion selective channel) nos cérebros aviar, bovino e murino
Efeito da concentração de sacarose na germinação in vitro do pólen de cinco acessos de bacurizeiro (Platonia insignis MART.)
If SARS-CoV-2 is blamed for causing meningoencephalitis, the virus must be detected in the CSF
Before attributing COVID_19-related ischemic stroke to hypercoagulability alternative causes should be excluded
A Possible Role Of The Thalamus In Some Cases Of Sudden Unexpected Death In Epilepsy [9]
[No abstract available]48510361037Betting, L.E., Mory, S.B., Li, L.M., Lopes-Cendes, I., Guerreiro, M.M., Guerreiro, C.A., Cendes, F., Voxel-based morphometry in patients with idiopathic generalized epilepsies (2006) Neuroimage, 32, pp. 498-502Betting, L.E., Mory, S.B., Lopes-Cendes, I., Li, L.M., Guerreiro, M.M., Guerreiro, C.A., Cendes, F., MRI volumetry shows increased anterior thalamic volumes in patients with absence seizures (2006) Epilepsy Behav, 8, pp. 575-580Bonilha, L., Rorden, C., Castellano, G., Cendes, F., Li, L.M., Voxel-based morphometry of the thalamus in patients with refractory medial temporal lobe epilepsy (2005) Neuroimage, 25, pp. 1016-1021Boyko, W.J., Galabru, C.K., McGeer, E.G., McGeer, P.L., Thalamic injections of kainic acid produce myocardial necrosis (1979) Life Sci, 25, pp. 87-98Norden, A.D., Blumenfeld, H., The role of subcortical structures in human epilepsy (2002) Epilepsy Behav, 3, pp. 219-231Scorza, F.A., Sanabria, E.R.G., Calderazzo, L., Cavalheiro, E.A., Glucose utilization during interictal intervals in an epilepsy model induced by pilocarpine: A qualitative study (1998) Epilepsia, 39, pp. 1041-1045Scorza, F.A., Arida, R.M., Priel, M., Calderazzo, L., Cavalheiro, E.A., The contribution of the lateral posterior and anteroventral thalamic nuclei on spontaneous recurrent seizures in the pilocarpine model of epilepsy (2002) Arq Neuropsiquiatr, 60, pp. 572-575Tomson, T., Walczak, T., Sillanpaa, M., Sander, J.W., Sudden unexpected death in epilepsy: A review of incidence and risk factors (2005) Epilepsia, 46, pp. 54-6
Sudden Unexpected Death In Epilepsy: Small Rnas Raise Expectations
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