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Ingram G.,CNRS Laboratory of Plant Reproduction and Development | Gutierrez-Marcos J.,University of Warwick
Journal of Experimental Botany | Year: 2015

Cell-cell communication is pivotal for the coordination of various features of plant development. Recent studies in plants have revealed that, as in animals, secreted signal peptides play critical roles during reproduction. However, the precise signalling mechanisms in plants are not well understood. In this review, we discuss the known and putative roles of secreted peptides present in the seeds of angiosperms as key signalling factors involved in coordinating different aspects of seed development. © 2015 The Author.

Finet C.,Howard Hughes Medical Institute | Jaillais Y.,CNRS Laboratory of Plant Reproduction and Development
Developmental Biology | Year: 2012

Auxin is implicated throughout plant growth and development. Although the effects of this plant hormone have been recognized for more than a century, it is only in the past two decades that light has been shed on the molecular mechanisms that regulate auxin homeostasis, signaling, transport, crosstalk with other hormonal pathways as well as its roles in plant development. These discoveries established a molecular framework to study the role of auxin in land plant evolution. Here, we review recent advances in auxin biology and their implications in both micro- and macro-evolution of plant morphology. By analogy to the term 'hoxology', which refers to the critical role of . HOX genes in metazoan evolution, we propose to introduce the term 'auxology' to take into account the crucial role of auxin in plant evo-devo. © 2012 Elsevier Inc.

Jaillais Y.,CNRS Laboratory of Plant Reproduction and Development | Vert G.,French National Center for Scientific Research | Vert G.,Salk Institute for Biological Studies
Nature Cell Biology | Year: 2012

The steroid hormones found in plants, the brassinosteroids, were originally genetically identified about 15 years ago as critical regulators of seedling photomorphogenesis. Two studies now shed light on the molecular mechanisms behind this observation. Brassinosteroids control seedling morphogenesis through direct interaction with master transcriptional regulators downstream of growth-promoting hormones and light signalling. © 2012 Macmillan Publishers Limited. All rights reserved.

Hamant O.,CNRS Laboratory of Plant Reproduction and Development
BMC Biology | Year: 2011

In developmental biology, the accumulation of qualitative phenotypic descriptions has fueled the need for testable parsimonious hypotheses, giving a fresh impetus to quantitative strategies. As an illustration, thanks to the precise quantification of cell growth and microtubule behavior in a study published in BMC Plant Biology, Zhang and collaborators have identified sequential phases of polarized and isotropic growth in puzzle-shaped leaf epidermal cells, thus providing new clues to explore how growth coordination occurs in this tissue. © 2011 Hamant; licensee BioMed Central Ltd.

Das P.,CNRS Laboratory of Plant Reproduction and Development
Current Opinion in Genetics and Development | Year: 2011

The growth of tissues, organs or organisms derives from the coordinated activities of complex genetic regulatory networks. In addition to its molecular underpinnings, growth also generally involves significant changes in geometry. To fully understand morphogenesis in its molecular and physical contexts the development of an interdisciplinary approach is required associating biology, mathematics, and physics, which held together by computer science. Growth quantitation and digital simulations have been developed to generate and test the plausibilities of complex hypotheses. Increasingly, real-time live imaging protocols are becoming an essential part of this process. In this review, I discuss the evolution of imaging techniques in plant developmental biology and briefly examine the different ways in which these studies have shed light on growth and morphogenesis in plants. © 2011 Elsevier Ltd.

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