@inproceedings{fdi:010096562,
  title = {{QUI}-{GON} {JINN}, a member of the {YODA} family, plays a role during female reproduction in {A}rabidopsis thaliana [r{\'e}sum{\'e}]},
  author = {{S}iena, {L}.{A}. and {M}ichaud, {C}aroline and {C}olono, {C}. and {S}ol {V}ega, {M}. and {O}rtiz, {J}.{P}.{A}. and {P}essino, {S}.{C}. and {L}eblanc, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{P}aspalum notatum, a subtropical forage grass native to {S}outh {A}merica, has proven to be a fruitful model for studying apomixis in plants. {S}everal genes associated with apomixis have been identified through genetic





mapping and comparative m{RNA} analyses, including {QUI}-{GON} {JINN} ({QGJ}) encoding a {MAPK}3 protein of the {YODA} family. {I}nterestingly, the downregulation of {QGJ} in {P}. notatum apomictic genotypes has been associated





with a decrease in the number of unreduced (aposporous) embryo sacs. {T}o disclose {QGJ} function during sexual development, we have undertaken its functional characterization in the model plant {A}rabidopsis thaliana using





genetic and cellular approaches. {T}he protein accumulation generated by {GUS} reporter lines indicated that {QGJ} is expressed during ovule development and accumulates in the {L}1 cell layer of the ovule primordium, but not





in the placenta. {QGJ} is also expressed in degenerating megaspores, while functional megaspores completely lack signal. {F}inally, in developing seeds, the endosperm showed {GUS} accumulation, but the zygote and growing





embryos were completely devoid of signal. {F}urthermore, qgj defective mutants led to reproductive alterations of the female development, in a manner reminiscent of apomixis. {F}urthermore, qgj mutants showed alterations





during female meiosis, female gametophytic development and early seed development. {T}hese results indicate that {QGJ} is expressed during megasporogenesis and endosperm development, and suggest that its function





is related with megaspore degeneration in the tetrad, gametophyte development and non-cell autonomous control of embryo development.},
  keywords = {{AMERIQUE} {DU} {SUD}},
  numero = {},
  pages = {47},
  booktitle = {{V} {I}nternational {APOMIXIS} 2025 {C}onference : book of abstracts},
  year = {2025},
  URL = {https://www.documentation.ird.fr/hor/fdi:010096562},
}