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Characterization of factors participating in regulation of intracellular dynamics of auxin carriers
Lacek, Jozef ; Zažímalová, Eva (advisor) ; Ibl, Verena (referee) ; Nodzynski, Tomasz (referee)
Plants are known to adjust the orientation of their organs, shoot and root, to ensure maximal energy generation and nutrient uptake, but also to avoid toxic growth conditions. Directional growth regulation depends on asymmetric plant organ growth and it is crucial to ensure plant survival. It is orchestrated on cellular level in concert with exogenous and intrinsic signals. Even though tropistic growth responses of plants were described by Darwin on macroscopic level already in 1880, now it is necessary to understand molecular mechanisms that underpin efficient modulation of directional plant growth. During my studies I focused on factors that modulate directional root growth regulation. The root is a complex, three-dimensional object, which continuously modifies its shape and growth path. Since the root needs to expand its surface to supply the plant with nutrients and water, it is important to understand how roots cope with changing growth conditions while exploring the soil. If the root cannot manage to grow through soil efficiently, mechanical impedance and lack of resources will also restrict shoot growth as well. Manifold signaling pathways coordinate the complex processes that underpin efficient root growth, including those modulated by phytohormones, sugars, flavonoids and other...
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