It is already known that auxin induces an elongation growth response in plant cells (acid growth). Although it has been studied for decades, the mechanism is still poorly understood, since growth is a very complex, integrated response of the entire cell. Using tomato hypocotyl segments as experimental system to better understand the mechanism involved in auxin-induced elongation, we investigated the effect of different metabolic compounds on the expression of an expansin gene, LeEXPA2, whose transcription is up-regulated by auxin in the growing regions of tomato hypocotyls. Expansins have unique and well-defined cell wall loosening effects, mediating cell wall relaxation in a pH-dependent manner and enable plant cells to elongate in response to their internal turgor pressure.
Role of acetylcholine in plant cell elongation / Arru, Laura; Fornaciari, Silvia. - STAMPA. - (2009), pp. .-.. (Intervento presentato al convegno 5th International Symposium on Plant Neurobiology tenutosi a Florence nel 25-29 May).
Role of acetylcholine in plant cell elongation
ARRU, Laura;FORNACIARI, Silvia
2009
Abstract
It is already known that auxin induces an elongation growth response in plant cells (acid growth). Although it has been studied for decades, the mechanism is still poorly understood, since growth is a very complex, integrated response of the entire cell. Using tomato hypocotyl segments as experimental system to better understand the mechanism involved in auxin-induced elongation, we investigated the effect of different metabolic compounds on the expression of an expansin gene, LeEXPA2, whose transcription is up-regulated by auxin in the growing regions of tomato hypocotyls. Expansins have unique and well-defined cell wall loosening effects, mediating cell wall relaxation in a pH-dependent manner and enable plant cells to elongate in response to their internal turgor pressure.
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