منابع مشابه
Precursory Seismicity Patterns
Mature seismic gaps are defined here as gaps in which a possible precursor to a future event has been identified. The seismic potential of these seismic gaps is enhanced relative to immature seismic gaps. The seismic gap hypothesis by itself provides an excellent means of narrowing spatial limits along plate boundaries within which the great earthquakes of the next several decades are expected....
متن کاملStrigolactones contribute to shoot elongation and to the formation of leaf margin serrations in Medicago truncatula R108.
Strigolactones were recently identified as a new class of plant hormones involved in the control of shoot branching. The characterization of strigolactone mutants in several species has progressively revealed their contribution to several other aspects of development in roots and shoots. In this article, we characterize strigolactone-deficient and strigolactone-insensitive mutants of the model ...
متن کاملPrecursory dynamics in threshold systems.
A precursory dynamics, motivated by the analysis of recent experiments on solid-on-solid friction, is introduced in a continuous cellular automaton that mimics the physics of earthquake source processes. The resulting system of equations for the interevent cycle can be decoupled and yields an analytical solution in the mean-field limit, exhibiting a smoothing effect of the dynamics on the stres...
متن کاملUlmus americana (Ulmaceae) is a polyploid complex.
PREMISE OF THE STUDY Exotic diseases are threatening many North American tree species, and management of diseases requires understanding the biology of the host as well as the pathogen. Ulmus americana is a widespread dominant tree of eastern North America that has been widely planted as an ornamental and shade tree. Populations of the species have suffered heavy mortality from Dutch elm diseas...
متن کاملCOTYLEDON 2 (CUC2) facilitates the initiation of serrations by enabling PIN1 to reorientate within the membranes of margin cells to change the auxin flux from a leaf tip oriented flux into a segmented flux towards convergence points where the serrations
INTRODUCTION Plant leaves have a major role in the photosynthetic supply of nutrients, gas exchange, the distribution of nutrients and water transport (Tsukaya, 2006). To optimise these functions in different habitats, plants need to adapt leaf positioning, size and shape (Hasson et al., 2010; Nicotra et al., 2011). An important trait of leaf shape variation is the outline of the leaf margin, w...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1905
ISSN: 0006-8071
DOI: 10.1086/328669