@article{fdi:010084583, title = {{M}icro-{RNA}-regulated {SQUAMOSA}-{PROMOTER} {BINDING} {PROTEIN}-{LIKE} ({SPL}) gene expression and cytokinin accumulation distinguish early-developing male and female inflorescences in oil palm ({E}laeis guineensis)}, author = {{T}regear, {J}ames and {R}ichaud, {F}. and {C}ollin, {M}yriam and {E}sbelin, {J}. and {P}arrinello, {H}. and {C}ochard, {B}. and {N}odichao, {L}. and {M}orcillo, {F}. and {A}dam, {H}{\'e}l{\`e}ne and {J}ouannic, {S}tefan}, editor = {}, language = {{ENG}}, abstract = {{S}exual differentiation of inflorescences and flowers is important for reproduction and affects crop plant productivity. {W}e report here on a molecular study of the process of sexual differentiation in the immature inflorescence of oil palm ({E}laeis guineensis). {T}his species is monoecious and exhibits gender diphasy, producing male and female inflorescences separately on the same plant in alternation. {T}hree main approaches were used: small {RNA}-seq to characterise and study the expression of mi{RNA} genes; {RNA}-seq to monitor m{RNA} accumulation patterns; hormone quantification to assess the role of cytokinins and auxins in inflorescence differentiation. {O}ur study allowed the characterisation of 30 previously unreported palm {MIRNA} genes. {I}n differential gene and mi{RNA} expression studies, we identified a number of key developmental genes and mi{RNA}-m{RNA} target modules previously described in relation to their developmental regulatory role in the cereal panicle, notably the mi{R}156/529/535-{SQUAMOSA} {PROMOTER}-{BINDING} {PROTEIN}-{LIKE} ({SPL}) gene regulatory module. {G}ene enrichment analysis highlighted the importance of hormone-related genes, and this observation was corroborated by the detection of much higher levels of cytokinins in the female inflorescence. {O}ur data illustrate the importance of branching regulation within the developmental window studied, during which the female inflorescence, unlike its male counterpart, produces flower clusters on new successive axes by sympodial growth.}, keywords = {inflorescence ; branching ; sexual differentiation ; oil palm ; mi{RNA} ; {SQUAMOSA} {PROMOTER}-{BINDING} {PROTEIN}}, booktitle = {}, journal = {{P}lants}, volume = {11}, numero = {5}, pages = {685 [16 ]}, year = {2022}, DOI = {10.3390/plants11050685}, URL = {https://www.documentation.ird.fr/hor/fdi:010084583}, }