وهي اثناء الليل تقوم بإغلاق اوراقها وتقلل الحركة واثناء النوم تقوم بإعادة فتح الاوراق وتتحرك بكثرة
So during the night, they curl the leaves and reduce the movement, and during the day, you have the opening of the leaves -- there is much more movement.