اﺛﺮ ﺗﻨﺶ ﺷﻮري ﺑﺮ ﺗﺠﻤﻊ ﮐﺎدﻣﯿﻢ، ﺳﺮب و روي در رﯾﺸﻪ و اﻧﺪام ﻫﻮاﯾﯽ دو رﻗﻢ ﮔﻨﺪم دورم

The effects of salinity on the accumulation of Cd, Pb and Zn in root and shoot of two durum wheat cultivars

در اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﮔﻠﺪاﻧﯽ ﺗﺄﺛﯿﺮ ﺳﻪ ﺳﻄﺢ ﺷﻮري آب آﺑﯿﺎري )ﺷﺎﻫﺪ، 75 و150 ﻣﯿﻠﯽﻣﻮﻻر ﮐﻠﺮﯾﺪ ﺳﺪﯾﻢ( ﺑﺮ ﻣﯿﺰان ﺟﺬب ﻋﻨﺎﺻﺮ ﺳﻨﮕﯿﻦ ﺗﻮﺳﻂ دو رﻗﻢ ﮔﻨﺪم دورم )ﯾﺎواروس و ﺑﻬﺮﻧﮓ( ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. آزﻣﺎﯾﺶ ﺑﻪ ﺻﻮرت ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮك ﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ اﺟﺮا ﮔﺮدﯾﺪ. در اﺛﺮ ﺷﻮري ﻏﻠﻈﺖ ﮐﺎدﻣﯿﻢ، ﺳﺮب و روي در اﻧﺪام ﻫﻮاﯾﯽ و رﯾﺸﻪ اﻓﺰاﯾﺶ ﯾﺎﻓﺖ و ﻣﯿﺰان اﯾﻦ اﻓﺰاﯾﺶ در اﻧﺪام ﻫﻮاﯾﯽ ﺑﺮاي ﮐﺎدﻣﯿﻢ ﻧﺴﺒﺖ ﺑﻪ دو ﻋﻨﺼﺮ دﯾﮕﺮ ﺑﯿﺸﺘﺮ ﺑﻮد. ﺑﺮﻫﻤﮑﻨﺶ ﺷﻮري و رﻗﻢ ﺑﺮ ﻏﻠﻈﺖ ﮐﺎدﻣﯿﻢ و ﺳﺮب در اﻧﺪام ﻫﻮاﯾﯽ ﻣﻌﻨﯽ دار ﺑﻮد، ﺑﻪ ﻃﻮري ﮐﻪ در ﻫﺮ دو ﺳﻄﺢ ﺷﻮري ﻣﯿﺰان اﻓﺰاﯾﺶ ﻏﻠﻈﺖ ﮐﺎدﻣﯿﻢ در رﻗﻢ ﯾﺎواروس در ﻣﻘﺎﯾﺴﻪ ﺑﺎ رﻗﻢ ﺑﻬﺮﻧﮓ ﺑﯿﺸﺘﺮ ﺑﻮد در ﺣﺎﻟﯽ ﮐﻪ در ﺳﻄﺢ ﺷﻮري 150 ﻣﯿﻠﯽﻣﻮﻻر ﻣﯿﺰان اﻓﺰاﯾﺶ ﻏﻠﻈﺖ ﺳﺮب در رﻗﻢ ﺑﻬﺮﻧﮓ ﺑﯿﺸﺘﺮ ﺑﻮد. ﻧﺘﺎﯾﺞ اﯾﻦ آزﻣﺎﯾﺶ ﻧﺸﺎن داد ﮐﻪ در ﺷﺮاﯾﻂ ﺷﻮر ﺟﺬب ﻋﻨﺎﺻﺮ ﺳﻨﮕﯿﻦ ﺗﻮﺳﻂ ﮔﻨﺪم ﺗﺸﺪﯾﺪ ﺷﺪه و ﺗﻔﺎوت ارﻗﺎم ﮔﻨﺪم دورم از اﯾﻦ ﻧﻈﺮ ﺑﻪ ﻧﻮع ﻋﻨﺼﺮ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ و ﺳﻄﺢ ﺷﻮري ﺑﺴﺘﮕﯽ دارد.

This pot experiment investigated the effects of three levels of irrigation water salinity (control, 75 and 150 mM NaCl) on heavy metals uptake by two durum wheat cultivars (Yavaros and Behrang). The treatments in this experiment were arranged as factorial in a randomized complete block design. Salinity increased Cd, Pb and Zn concentrations in shoot and root and the extent of increases were greater for Cd. The interaction effects of salinity and cultivar were significant on shoot Cd and Pb concentrations. The increase in Cd concentration due to salinity was more in Yavarous than in Behrang but at 150 mM NaCl the extent of increase in Pb was greater in Behrang. The results of this experiment showed that heavy metals uptake may be increased under saline conditions and the differences among durum wheat cultivars in this regards may depend on the evaluated heavy metal element and salinity level.