Effects of exogenous gibberellins and paclobutrazol on floral stalk growth of tulip sprouts isolated from cooled and non-cooled tulip bulbs [tissue sensitivity]

alargamiento del tallo allongement de la tige bulbe bulbo bulbs cold cooling crecimiento croissance cultivo de tejidos culture de tissu enfriamiento etapas de desarrollo de la planta fleur floraison induite flores flowers frio froid ga gibberelline growth induced flowering paclobutrazol plant developmental stages refroidissement sprouting stem elongation tissue culture tulipa