... defense priming via systemic acquired resistance (SAR), or induced systemic resistance (ISR), affects tomato development and growth. We found that defense priming can promote, rather than inhibit, plant development, and that defense priming and growth trade-offs can be uncoupled. Cytokinin response...

...Christian A. Burr; Jinjing Sun; Maria V. Yamburenko; Andrew Willoughby; Charles Hodgens; Samantha Louise Boeshore; Agustus Elmore; Jonathan Atkinson; Zachary L. Nimchuk; Anthony Bishopp; G. Eric Schaller; Joseph J. Kieber ABSTRACT The phytohormone cytokinin regulates diverse aspects of plant growth...

...Jennifer M. Worthen; Maria V. Yamburenko; Jeewoo Lim; Zachary L. Nimchuk; Joseph J. Kieber; G. Eric Schaller ABSTRACT Cytokinins are plant hormones with crucial roles in growth and development. Although cytokinin signaling is well characterized in the model dicot Arabidopsis , we are only beginning...

... modelling Vascular pattern Auxin Cytokinin Developmental biology Root biology Patterning of organs involves the organization of cell fates within a tissue in space and time. Although the molecular networks that control pattern formation may be considered as deterministic, there is increasing...

.... Little is known about how this coordination is achieved. Here, we investigated coordination in Arabidopsis thaliana seedlings by studying the impact of cell wall damage (CWD, caused by cellulose biosynthesis inhibition) on cytokinin homeostasis, cell cycle gene expression and cell shape in root tips. CWD...

...Joseph J. Kieber; G. Eric Schaller ABSTRACT The phytohormone cytokinin plays diverse roles in plant development, influencing many agriculturally important processes, including growth, nutrient responses and the response to biotic and abiotic stresses. Cytokinin levels in plants are regulated...

... of trichome formation in an age-dependent manner. We show that AG regulates cytokinin responses and genetically interacts with the organ polarity gene KANADI1 to suppress trichome initiation on gynoecia. Thus, our results show that parts of the genetic program for leaf development remain active during flower...

... of ER-family activity. Furthermore, the CLAVATA3- and cytokinin-induced outputs, which contribute to stem cell homeostasis, are dysfunctional in a tissue layer-specific manner in ER-family mutants. Collectively, our findings suggest that the ER family plays a role in the coordination of stem cell...

...Ian H. Street; Dennis E. Mathews; Maria V. Yamburkenko; Ali Sorooshzadeh; Roshen T. John; Ranjan Swarup; Malcolm J. Bennett; Joseph J. Kieber; G. Eric Schaller Hormonal interactions are crucial for plant development. In Arabidopsis , cytokinins inhibit root growth through effects on cell...

...Margaret E. Wilson; Matthew Mixdorf; R. Howard Berg; Elizabeth S. Haswell The balance between proliferation and differentiation in the plant shoot apical meristem is controlled by regulatory loops involving the phytohormone cytokinin and stem cell identity genes. Concurrently, cellular...

... components of transmitting tract formation, affect both auxin and cytokinin responses during reproductive tissue development. We find that HEC1 interacts with SPATULA (SPT) to control carpel fusion and that both transcription factors restrict sensitivity to cytokinin in the gynoecium. In addition, HEC1...

...Sedeer El-Showk; Raili Ruonala; Ykä Helariutta Cytokinins are a major class of plant hormones that are involved in various aspects of plant development, ranging from organ formation and apical dominance to leaf senescence. Cytokinin and auxin have long been known to interact antagonistically...

... Callus Cytokinin Regeneration Self-organization Shoot meristem Arabidopsis thaliana Regeneration of a patterned multicellular organism from isolated pieces of adult somatic tissues is a remarkable phenomenon that occurs both in plants and animals ( Morgan, 1901 ). The small Cnidarian...

...Frederick Meins, Jr; Monique Thomas During the development of tobacco plants, cells undergo epigenetic changes that alter their requirement in culture for the cell-division factor cytokinin. Cultured leaf cells alternate between cytokinin-requiring(C – ) and cytokinin-independent (C + ) states...

... mutagenized Arabidopsis thaliana plants. The screen was performed in the presence or absence of cytokinin. The mutants isolated were those that showed a significant hypertrophy of their apical parts when grown on cytokinin-containing medium. The pas mutants have altered embryo, leaf and root development...

... and cytokinin. We have developed the TCL culture system into a sensitive and reproducible bioassay for the study of morphogenesis. The advantages of using the TCL morphogenesis bioassay for the identification and study of molecules (e.g. cell wall oligosaccharides) that may regulate morphogenesis are discussed...