Esta é a página do laboratório do Dr. Carlos Hotta, do Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo.

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Quando criança, eu sonhava estudar dinossauros. Hoje em dia tenho outros sonhos mas ainda tenho brontossauros no meu jardim. Por Carlos Hotta.

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Circadian rhythms in sugarcane and other grasses

It is believed that the circadian clock is a conserved signalling pathway among the plants. However, a comparison between the circadian clock of the model plant Arabidopsis thaliana and the circadian clock of other species shows that there are variations in structure and regulation of their components.

The aim of this project is to understand the circadian clock behaviour of sugarcane and other grasses, like Brachypodium distachyon. We also aim to understand how this signalling pathway contributes to the high productivity and high sucrose accumulation of sugarcane. 


Organ- and tissue- specific circadian clocks in C4 grasses

An emerging trend in the field is the characterization of tissue-specific circadian clocks. It was believed that the plant circadian clocks inside each cells were independent from the others.

However, recent studies have suggested a different view: not only were the circadian clocks at the mesophyl different from the circadian clocks at the vascular tissue, but they were regulate by it as well.

In the face of this new paradigm, with specialized tissue-specific circadian clocks that communicate and regulate each other, three questions arise: a) What is the nature of the difference between each circadian clock?, b) How the different circadian clocks communicate with each other? C) How tissue-specific circadian clocks increase the productivity of a plant?

The aim of this project is to characterize the circadian clock in different organs and tissues in C4 grasses and investigate their interaction.