ﺑﺮرﺳﯽ ﺗﻨﺶ ﺧﺸﮑﯽ ﺑﺮ ﻓﻠﻮرﺳﺎﻧﺲ ﮐﻠﺮوﻓﯿﻞ و ﻣﺤﺘﻮای ﮐﻠﺮوﻓﯿﻠﯽ ارﻗﺎم ﻣﺨﺘﻠﻒ ﮐﻠﺰای ﺑﻬﺎره

Effect of drought stress on chlorophyll fluorescence and chlorophyll content of different spring canola cultivars