Julien B. Bachelier
Postdoctoral Fellow, Friedman Lab
PhD University of Zurich, Switzerland
Diploma National Museum of Natural History of Paris, France
MS University of Nice-Sophia-Antipolis, France
I am interested in the evolution of seed plants, particularly in the origin of flowering plants and the evolutionary development of flower and carpel.
I started with practical studies in plant architecture and used Monte Carlo Markov Chain processes to model branching patterns. Initially I studied the correlation between branching pattern plasticity and genetic diversity in the genus Cupressus, and later participated in a major project investigating the correlation between plant development and photosynthetic performances in different species of tropical trees in French Guyana.
Shortly thereafter, I began a PhD supervised by Peter Endress and comparatively studied the evolution of the flower and gynoecium (the female part of the flower) in two very closely related families of Sapindales, Anacardiaceae (mango family), and Burseraceae (frankincense family). Before I finished my PhD, advances in the molecular systematics of Sapindales showed that Kirkia (Kirkiaceae) does not belong to the Simaroubaceae and is sister to the Anacardiaceae and Burseraceae clade, whereas Nitraria, Peganum, and Tetradiclis, which were sometimes scattered in unrelated groups, actually form a robust clade now referred to as Nitrariaceae. Consequently, I compared the floral structure and development of Kirkia in the last chapter of my doctoral thesis and conducted an initial comparative study of flowers of Nitrariaceae prior to starting my postdoc.
While I am still keeping an eye on the systematics of Sapindales, I wanted to get back toward the “roots” of flowering plants and started a postdoctoral study with Ned Friedman on the embryology and reproductive biology of extant ancient lineages of flowering plants, such as water lilies and their close relatives.
- Friedman WE and JB Bachelier. 2013. Embryology in Trimenia (Trimeniaceae) and its bearing on the embryo-nourishing strategies in early flowering plant lineages. American Journal of Botany. In press.
- Tsuchimatsu T, P Kaiser P, C-L Yew, JB Bachelier, and KK Shimizu. 2012. Recent loss of self-incompatibility by degradation of the male component in allotetraploid Arabidopsis kamchatica. PLoS Genetics, 8: e1002838.
- Friedman WE, JB Bachelier, and JI Hormaza. 2012. Embryology in Trithuria submersa (Hydatellaceae) and relationships between embryo, endosperm, and perisperm in early-diverging flowering plants. American Journal of Botany 99: 1083-1095.
- Kretzschmar T, W Kohlen, J Sasse, L Borghi, M Schlegel, JB Bachelier, D Reinhardt, R Bours, HJ Bouwmeester, and E Martinoia. 2012. A petunia ABC protein controls strigolactone dependent symbiotic signaling and branching. Nature 483-341-344. (This paper was selected by the faculty of 1000 as a must read.)
- Zhao L, JB Bachelier, H-L Chang, X-H Tian, and Y Ren. 2012. Inflorescence and floral development in Ranunculus and three allied genera in Ranunculeae (Ranunculoideae, Ranunculaceae). Plant Systematics and Evolution 298: 1057–1071.
- Zhao L, W Wang, Y Ren, and JB Bachelier. 2012. Flower morphology and development in Asteropyrum (Ranunculaceae): implication for its systematic position. Annales Botanici Fennici 49: 31-42.
- Bachelier JB and WE Friedman. 2011. Female gamete competition in an ancient angiosperm lineage. Proceedings of the National Academy of Sciences, USA 108:12360-12365. (This paper was selected by the faculty of 1000 as a must read.)
- Bachelier JB, PK Endress, and LP Ronse De Craene. 2011. Comparative floral structure and development of Nitrariaceae (Sapindales) and systematic implications. In Flowers on the tree of life. Eds. L Wanntorp and LP Ronse De Craene. Cambridge: Cambridge University, 181-217.
- Bachelier JB and PK Endress. 2009. Comparative floral morphology of Anacardiaceae and Burseracecae, with a special emphasis on the gynoecium. Botanical Journal of the Linnean Society 159: 499-571.
- Bachelier JB and PK Endress. 2008. Floral structure in Kirkia (Kirkiaceae) and its systematic position in Sapindales. Annals of Botany 102: 539-550.
- Pichot C, B Lien, JL Rivera Nava, JB Bachelier, and M El Maâtaoui. 2008. Cypress surrogate mother produces haploid progeny from alien pollen. Genetics 179: 379-383.
- Bachelier JB and PK Endress. 2007. Development of inflorescences, cupules, and flowers in Amphipterygium and comparison with Pistacia (Anacardiaceae). International Journal of Plant Sciences 168: 1237-1253.