Researchers have known since the nineteen thirties that the actively growing tip of a plant releases a hormone called auxin.
VOA: special.2009.10.13
Meanwhile, the rest of the workforce which has occupied theplantsincethe dispute began more than four weeks ago, say they will wait until the agreement is ratified at national level and redundancy payments begin before they leave the site.
He added that it was the first time so many facilities had been affected by electrical failure at the same time sincetheplant was brought under control in December 2011.