The gynoecium, the female reproductive part of the flower, is key for plant sexual reproduction. During its development, inner tissues such as the septum and the transmitting tract tissue, important for pollen germination and guidance, are formed. In Arabidopsis, several transcription factors are known to be involved in the development of these tissues. One of them is NO TRANSMITTING TRACT (NTT), essential for transmitting tract formation. We found that the NTT protein can interact with several gynoecium-related transcription factors, including several MADS-box proteins like SEEDSTICK (STK), known to specify ovule identity. Evidence suggests that NTT and STK control enzyme and transporter-encoding genes involved in cell wall polysaccharide and lipid distribution in gynoecial medial domain cells. The results indicate that the simultaneous loss of NTT and STK activity affects polysaccharide and lipid deposition, septum fusion, and delays entry of septum cells to their normal degradation program. Furthermore, we identified KAWAK, a direct target of NTT and STK, which is required for the correct formation of fruits in Arabidopsis. These findings position NTT and STK as important factors in determining reproductive competence.
New roles of NO TRANSMITTING TRACT and SEEDSTICK during medial domain development in Arabidopsis fruits / H. Herrera-Ubaldo, P. Lozano-Sotomayor, I. Ezquer, M. Di Marzo, R.A. Chávez Montes, A. Gómez-Felipe, J. Pablo-Villa, D. Diaz-Ramirez, P. Ballester, C. Ferrándiz, M. Sagasser, L. Colombo, N. Marsch-Martínez, S. de Folter. - In: DEVELOPMENT. - ISSN 0950-1991. - 146:1(2019 Jan), pp. dev172395.1-dev172395.14.
|Titolo:||New roles of NO TRANSMITTING TRACT and SEEDSTICK during medial domain development in Arabidopsis fruits|
|Parole Chiave:||Cell wall; Fruit; Gynoecium; KAWAK; Lipids; Medial domain; NO TRANSMITTING TRACT; Polysaccharide; SEEDSTICK; Septum|
|Settore Scientifico Disciplinare:||Settore BIO/01 - Botanica Generale|
|Progetto:||Exploring the molecular control of seed yield in crops|
MADS box transcription factors: interactions between metabolic pathways and seed development
|Data di pubblicazione:||gen-2019|
|Data ahead of print / Data di stampa:||12-dic-2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1242/dev.172395|
|Appare nelle tipologie:||01 - Articolo su periodico|