تاثیر آلودگی عناصر سنگین خاک اطراف پالایشگاه بر ویژگی های رشد، فتوسنتز و پرولین گیاه vigna radiata l

ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﻲ ﺗﺄﺛﻴﺮ ﺗﻨﺶ ﻓﻠﺰات ﺳﻨﮕﻴﻦ ﻣﻮﺟﻮد در ﺧﺎک اﻃﺮاف ﭘﺎﻻﻳﺸﮕﺎه ﮔﺎزی ﺑﻴﺪﺑﻠﻨﺪ1 ﺑﺮ ﺧﺼﻮﺻﻴﺎتمورفولوژیکی و بیو شیمیایی ﮔﻴﺎه ﻣﺎش، آزﻣﺎﻳﺶ گلدانی در ﻗﺎﻟﺐ ﻃﺮح ﻛﺎﻣﻼً تصادفی ﺑﺎ 4 ﺗﻜﺮار اﻧﺠﺎم ﺷﺪ. ﻧﻤﻮﻧﻪ ﺑﺮداری از ﺧﺎک در ﺳﻪ اﻳﺴﺘﮕﺎه ﺑﻪ ﻣﺮﻛﺰﻳﺖ ﭘﺎﻻﻳﺸﮕﺎه و ﺑﻪ ﻓﻮاﺻﻞ 500، 1000 و 1500 ﻣﺘﺮ و ﻳﻚ ﻣﻨﻄﻘﻪ دور از ﭘﺎﻻﻳﺸﮕﺎه )ﺧﺎک ﺷﺎﻫﺪ و ﻓﺎﻗﺪ آلودگی ﻓﻠﺰات ﺳﻨﮕﻴﻦ( ﺻﻮرت ﮔﺮﻓﺖ. ﺑﺬرﻫﺎی ﻣﺎش در ﺧﺎک ﺷﺎﻫﺪ و ﺳﻪ ﺳﻄﺢ ﺧﺎک آﻟﻮده ﺑﺎ ﻋﻨﺎﺻﺮ ﺳﻨﮕﻴﻦ ﻛﺸﺖ ﺷﺪﻧﺪ. ﻧﺘﺎﻳﺞ آﻧﺎﻟﻴﺰ ﺧﺎک حاکی از آﻟﻮده ﺑﻮدن ﺧﺎک اﻃﺮاف ﭘﺎﻻﻳﺸﮕﺎه ﺑﻪ ﻋﻨﺎﺻﺮ ﻛﺎدﻣﻴﻢ، ﻛﺮوم، ﺳﺮب، واﻧﺎدﻳﻢ، ﺟﻴﻮه و آرﺳﻨﻴﻚ ﺑﻮد ﻛﻪ ﻣﻴﺰان آلودگی ﺑﺎ اﻓﺰاﻳﺶ ﻓﺎﺻﻠﻪ از ﭘﺎﻻﻳﺸﮕﺎه ﻛﺎﻫﺶ ﻳﺎﻓﺖ. ﻫﻤﭽﻨﻴﻦ ﻧﺘﺎﻳﺞ، ﺗﻐﻴﻴﺮات ﻣﻌﻨﻲ داری را در ﻣﻴﺰان رﺷﺪ و ﺻﻔﺎت ﻓﺘﻮﺳﻨﺘﺰی ﮔﻴﺎه ﻣﺎش در ﭘﺎﺳﺦ ﺑﻪ آلودگی ﻋﻨﺎﺻﺮ ﺳﻨﮕﻴﻦ ﺧﺎک ﻧﺸﺎن داد. آلودگی ﺧﺎک ﺑﺎ ﻓﻠﺰات ﺳﻨﮕﻴﻦ ﻣﻴﺰان ﻛﻠﺮوﻓﻴﻞ ﻫﺎی a و b، ﻛﻠﺮوﻓﻴﻞ ﻛﻞ،ﻛﺎروﺗﻨﻮﺋﻴﺪﻫﺎ، ﻓﺘﻮﺳﻨﺘﺰﺧﺎﻟﺺ، ﻋﻤﻠﻜﺮد ﻛﻮاﻧﺘﻮم ﺷﻴﻤﻴﺎﻳﻲ ﻓﺘﻮﺳﻴﺴﺘﻢ ﻫﺎ co2 ،piabsﺑﻴﻦ ﺳﻠﻮلی، ﺗﻌﺮق و ﻛﺎراﻳﻲ ﻣﺼﺮف آب را در ﺳﻄﺢ ﻣﻌﻨﻲ داری ﻛﺎﻫﺶ داد. ﺑﻴﺸﺘﺮﻳﻦ و ﻛﻤﺘﺮﻳﻦ ﻣﻴﺰان ﻛﺎﻫﺶ در ﭘﺎراﻣﺘﺮﻫﺎی ﻓﺘﻮﺳﻨﺘﺰی ﺑﻪ ﺗﺮﺗﻴﺐ در ﺧﺎک ﻫﺎی ﺟﻤﻊ آوری ﺷﺪه از ﻓﻮاﺻﻞ 500 و 1500 ﻣﺘﺮ ﺑﻪ ﭘﺎﻻﻳﺸﮕﺎه در ﻣﻘﺎﻳﺴﻪ ﺑﺎ ﺧﺎک ﺷﺎﻫﺪ ﻣﻼﺣﻈﻪ ﺷﺪ. ﻣﻴﺰان ﭘﺮوﻟﻴﻦ در ﭘﺎﺳﺦ ﺑﻪ آلودگی ﺧﺎک ﺑﺎ ﻓﻠﺰات ﺳﻨﮕﻴﻦ در ﺳﻄﺢ ﻣﻌﻨﻲ داری اﻓﺰاﻳﺶ ﻳﺎﻓﺖ ﻛﻪ در ﺗﻨﻈﻴﻢ اﺳﻤﺰی و ﺣﺬف رادﻳﻜﺎل ﻫﺎی آزاد اﻛﺴﻴﮋن در ﭘﺎﺳﺦ ﺑﻪ ﺗﻨﺶ ﻫﺎی محیطی ﻧﻘﺶ دارد. ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﺘﺎﻳﺞ اﻳﻦ ﺗﺤﻘﻴﻖ و اﺛﺮات ﻣﻨﻔﻲ ﻓﻠﺰات ﺳﻨﮕﻴﻦ ﺑﺮ رﺷﺪ و ﻓﺘﻮﺳﻨﺘﺰ ﮔﻴﺎه ﻣﺎش، ﭘﻴﺸﻨﻬﺎد ﻣﻲ ﺷﻮد ﻛﻪ از ﻛﺸﺖ ﮔﻴﺎﻫﺎن زراعی در زﻣﻴﻦ ﻫﺎی ﻛﺸﺎورزی اﻃﺮاف ﭘﺎﻻﻳﺸﮕﺎه ﮔﺎزﺧﻮد داری ﺷﻮد.

effect of heavy metal pollution of soil around the bidboland 1 gas refinery site on growth, photosynthesis and proline of vigna radiata l

this investigation was designed to study the effect of heavy metal pollution of soil around the bidboland 1 gas refinery site on morphological and biochemical characteristics of mung bean. a pot experiment was conducted in a completely randomized design with four replications. the soil sampling was carried out at three stations in about 500, 1000 and 1500 m away from bidboland gas refinery site. the control soil from a farm away from refinery site. soil analysis indicated that the soil around the refinery site was contaminated with cadmium, chromium, lead, vanadium, mercury and arsenic, which their contents reduced by increasing the distance from the refinery site. the mung bean seeds were cultured in control soil and three levels of contaminated soil with heavy elements. the results showed significant changes in plant growth and photosynthetic traits of mung bean plants in response to heavy metal pollution of soil. soil contamination with heavy metals significantly reduced the amount of chlorophylls a and b, total chlorophyll, carotenoids, photosynthesis, chemical quantum function of photosystems (piabs), intercellular co2, transpiration, and water use efficiency. the highest and lowest reduction in photosynthetic parameters was observed in the soil collected from distances of 500 and 1500 meters to the refinery, respectively, as compared to the control soil. heavy metal pollution increased the proline content. based on the results of present study and the danger of heavy metals pollution on mung bean growth and photosynthesis, it is suggested to avoid cultivation of crops around the gas refinery site.