Why seedlings always grow towards the light

Scientists from the Carnegie Institution at Stanford University and Wageningen University have discovered how cells in the stems of seedlings use blue light to grow towards the light. The scientists have now discovered how the blue light causes small structures in the cell, the microtubules, to grow perpendicular to their normal growth direction. As a result, the growth direction of seedlings also changes, making them head towards the light. The scientists discovered which protein is responsible for making the microtubules grow perpendicular to the normal direction. The results were published in Science.

Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...