Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"auxin transport"”.
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Agent Based Modelling of Auxin Transport Canalisation
The transport of the plant hormone auxin is central to many aspects of plant development. This thesis describes work developing agent-based simulations of auxin transport canalisation. Auxin transport canalisation is the dominant theory describing how auxin promotes its own transport through a …
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The role of auxin transport in the control of shoot branching
… play pivotal roles in regulating bud outgrowth. Auxin derived from the primary shoot apex and active branches inhibits bud outgrowth, whereas cytokinin promotes it. Strigolactones also inhibit bud outgrowth, by changing properties of the auxin transport network, increasing the competition between …
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Examination of auxin transport and root development in the scd1-1 mutant in Arabidopsis thaliana
The hormone indole-3-acetic acid (IAA) is transported unidirectionally in plant cells via asymmetrically localized carrier proteins. This polarity is believed to be established and maintained by vesicular delivery and endosomal cycling of these proteins. The SCD1 (stomatal cytokinesis defective) …
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The Role of the SCD1 Protein in Targeting PIN2 Protein in Arabidopsis Thaliana
Auxin transport polarity is established and maintained by the asymmetrical localization of auxin transport proteins in the plasma membrane. The <italic>SCD1<italic> (stomata cytokinesis defective) gene encodes a protein containing a DENN domain, which is predicted to function as a RAB-GEF, which …
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Regulatory dynamics of axillary bud competition in Arabidopsis
… to be based on their competition for auxin export; bud activation is thought to depend on the ability of buds to establish canalised auxin transport from the bud into the main stem, which can be prevented by the presence of an already canalised bud. In addition to systemic regulation …
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Auxin and the nodule
… to characterise the role of the plant hormone auxin in the development of nitrogen-fixing, indeterminate legume nodules. More specifically we want to know the timing of, and the processes responsible for, the auxin signaling induction detected upon inoculation of the root of Medicago truncatula …
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The hormonal regulation of PIN protein localisation and its relevance to shoot architecture
… of buds, which is partially mediated through auxin transport by PINs and the regulation thereof. Whilst PIN behaviour has been well characterised, the mechanisms by which PINs sense and respond to auxin, strigolactone and cytokinin remain unknown. In this thesis I investigate the regulation of …
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The role of auxin and ethylene in adventitious root formation in Arabidopsis and tomato
… root formation in these two species, while auxin has a similar stimulatory effect on adventitious root formation in both. Root excision increases both adventitious root formation and auxin transport. Additionally, local increases in auxin induced reporter expression after excision precede …
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SECURE PLANT FERTILITY IN A CHANGING CLIMATE
… (ANT) in the nucellus. ANT is a repressor of the auxin transporter PIN1, in this way the ANT repression allows PIN1 expression in the nucellus. In this work, PIN1 is described to be fundamental for auxin transport at the tip of ovule primordia. Here, thanks to the ARF transcription factors, auxin …
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Functional Analysis of AtVAMP714 gene in Arabidopsis
… gain-of-function mutants showing potential auxin defects, with the aim of identifying the new genes regulating plant development. The conjoined (cnj) mutant isolated from the activation tagged screen exhibits duplication of the seedling axis. Sequencing the insertion locus revealed that the …
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Abscisic acid : interactions with auxin in the regulation of root growth under water deficit conditions
… was tested that an interaction of ABA with auxin could potentially play a key role in regulating maize root growth maintenance under water deficit conditions by using the ABA-deficient mutant vp14 to determine whether altered auxin levels are associated with primary root growth inhibition. …
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Physiological, hormonal and metabolic alterations caused by selenium in rice seedlings
… changes in levels of plant hormones, such as auxin and ethylene. However, the impact of Se supply on relationships between hormones biosynthesis and primary metabolism during growth of rice (Oryza sativa L.) seedlings is poorly understood. Thus, the hypothesis that Se induces changes in the …
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Functional studies on the transmembrane protein encoded by the TM20 gene in maize
… auf, die in der Gegenwart von hohen Auxin-Dosen oder unter Zugabe von Auxin-Transport Inhibitoren kultiviert wurden. Diese Tatsache und die transporterähnliche Struktur des Proteins führt zu der Hypothese, dass TM20 ein Teil der Auxin-Transport Maschinerie sein könnte. Im Rahmen …
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REGULATION OF GROWTH AND GRAVITROPISM IN THE PEANUT GYNOPHORE
… of the peanut gynophore. Gibberellin and auxin were found to be important in regulating growth and gravitropism of gynophores in situ. Endogenous auxin levels appeared to be sub-optimal as low concentrations of applied IAA caused them to bend away from the point of application. Both auxin …
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