ﻣﺪلﺳﺎزی ﻫﻴﺪروﺗﺎﻳﻢ ﺟﻮاﻧﻪزﻧﻲ ﺑﺬر ﮔﻠﺮﻧﮓ (.Carthamus tinctorius L) ﺑﺎ اﺳﺘﻔﺎده از ﺗﻮزﻳﻊ وﻳﺒﻮل

Seed germination has been modeled extensively using hydrotime and hydrothermal time models. In this experiment, seed germination of two safflower varieties was tested across a range of water potential (0, -0.3, -0.6, -0.9 and -1.2 MPa). Hydrothermal model developed based of Weibull, distribution was used to illustrate the relative variation of base water potential. Result showed that there was no significant difference between
two varieties of safflower in terms of drought tolerance and speed ( ). As, the threshold water potential for germination and hydrotime constant of both varieties was estimated to be on average equal to -1.32 MPa and 36 MPa h, respectively.