ﭘﺎﺳﺦ ﻋﻠﻒﻫﺮز ﻣﻨﺪاب Eruca sativa Mill ﺑﻪ ﺳﻄﻮح ﻣﺨﺘﻠﻒ ﺗﻨﺶ ﺧﺸﮑﯽ

The response of Arugula weed (Eruca sativa Mill) to different levels of drought stress

ﺑــﻪ ﻣﻨﻈــﻮر ارزﯾــﺎﺑﯽ ﻣﻨــﺪاب ﺑــﻪ ﻋﻨــﻮان ﻋﻠــﻒﻫــﺮز راﯾــﺞ ﻣــﺰارع ﻏــﻼت اﺳــﺘﺎن ﺧﻮزﺳــﺘﺎن ﺑــﻪ ﺳــﻄﻮح ﻣﺨﺘﻠــﻒ ﺗــﻨﺶ ﺧﺸــﮑﯽ، آزﻣﺎﯾﺸــﯽ ﺑــﺎ 7 ﺗﯿﻤــﺎر )1 ،-0/8 ،-0/6 ،-0/4 ،-0/2 ،0- و 1/2- ﻣﮕﺎﭘﺎﺳــﮑﺎل( در ﺳــﻪ ﺗﮑــﺮار در داﻧﺸــﮕﺎه ﻋﻠــﻮم ﮐﺸــﺎورزي و ﻣﻨــﺎﺑﻊ ﻃﺒﯿﻌــﯽ ﺧﻮزﺳــﺘﺎن در ﺳــﺎل 1398 اﻧﺠــﺎم ﮔﺮﻓــﺖ. درﺻــﺪ ﺟﻮاﻧــﻪزﻧــﯽ از ﺳــﻄﺢ ﺧﺸــﮑﯽ ﺻــﻔﺮ ﺗــﺎ 0/8- ﻣﮕﺎﭘﺎﺳــﮑﺎل 100درﺻــﺪ ﺑــﻮد و در ﺗــﻨﺶ 1- ﻣﮕﺎﭘﺎﺳــﮑﺎل ﺟﻮاﻧــﻪزﻧــﯽ ﺑــﻪ 50 درﺻــﺪ رﺳــﯿﺪ. ﺟﻮاﻧــﻪزﻧــﯽ در ﺳــﻄﺢ ﺗــﻨﺶ 1/2- ﻣﮕﺎﭘﺎﺳــﮑﺎل ﻣﺸﺎﻫﺪه ﻧﮕﺮدﯾﺪ. ﺑـﺎ اﻓـﺰاﯾﺶ ﺳـﻄﺢ ﺗـﻨﺶ ﺧﺸـﮑﯽ ﺳـﺮﻋﺖ ﺟﻮاﻧـﻪ زﻧـ ﯽ ﮐـﺎﻫﺶ ﯾﺎﻓـﺖ . در ﺷـﺮاﯾﻂ ﺗـﻨﺶ ﺧﺸـﮑﯽ 0/2- و 0/4- ﻣﮕﺎﭘﺎﺳﮑﺎل ﺑﺮاي ﺳﺮﻋﺖ ﺟﻮاﻧـﻪ زﻧـﯽ اﺧـﺘﻼف ﻣﻌﻨـﯽ داري ﻣﺸـﺎﻫﺪه ﻧﺸـﺪ . ﺑـﺎ اﻓـﺰاﯾﺶ ﺗـﻨﺶ ﺧﺸـﮑﯽ ﻣﺘﻮﺳـﻂ زﻣـﺎن ﺟﻮاﻧـﻪ زﻧـﯽ اﻓــﺰاﯾﺶ و از 0/74 روز در ﺗﯿﻤــﺎر ﺷــﺎﻫﺪ ﺑــﻪ 3 روز در ﺗــﻨﺶ 1- ﻣﮕﺎﭘﺎﺳــﮑﺎل رﺳــﯿﺪ. اﺛــﺮ ﺗــﻨﺶ ﺧﺸــﮑﯽ ﺑﺮﺳــﺮﻋﺖ ﺟﻮاﻧــﻪزﻧــﯽ ﺑﯿﺸﺘﺮ از درﺻﺪ ﺟﻮاﻧﻪزﻧﯽ ﺑﻮد. ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﺘﺎﯾﺞ ﭘﺘﺎﻧﺴﯿﻞ اﺳﻤﺰ، ﻣﻨﺪاب ﺑﻪ ﺗﻨﺶ ﺧﺸﮑﯽ ﺑﺴﯿﺎر ﻣﻘﺎوم ﻣﯽﺑﺎﺷﺪ.

In order to investigation Arugula (Eruca sativa Mill) as common weeds in cereal fields of Khuzestan to different drought stresses, an experiment was conducted with 7 treatments (0, - 0.2, -0.4, -0.6, -0.8, -1 and -1.2 MPa) at agricultural sciences and natural resources university of Khuzestan in 2019 with 3 replications. Germination percentage was 100% from 0 to -0.8 MPa treatments and germination was reached to 5o% at 1-MPa .seed germination was not observed at -1.2 MPa of drought stress. By increasing of drought stress, germination rate was decreased. No significant differences in germination rate were observed both -0.2 and -0.4 MPa treatments. By increasing of drought stress, mean germination time was increased and reached from 0.74 day in control treatment to 3days in -1MPa treatment of drought stress. The effect of drought stress on germination rate was more than germination percentage. According to the results of osmotic potential, Arugula is highly tolerance to drought stress.