ﺑﺮرﺳﯽ ﺗﻨﺶ ﺧﺸﮑﯽ ﺑﺮ ﺟﻮاﻧﻪ زﻧﯽ ﮔﯿﺎه ﻣﺮﺗﻌﯽ Festuca ovina در ﻣﺠﺎورت ﻧﺎﻧﻮذرات اﮐﺴﯿﺪ روي

Investigation of Drought Stress effects on Germination of Festuca ovina in the present of ZnO Nanoparticles

ﺧﺸﮑﯽ ﯾﮑﯽ از ﻣﻬﻤﺘﺮﯾﻦ ﺗﻨﺶ ﻫﺎي ﻣﺤﯿﻄﯽ اﺳﺖ ﮐﻪ ﻣﻮرﻓﻮﻟﻮژي، ﻓﯿﺰﯾﻮﻟﻮژي و ﺑﯿﻮﺷﯿﻤﯽ ﮔﯿﺎه را ﺗﺤﺖ ﺗﺎﺛﯿﺮ ﻗﺮار ﻣﯽ دﻫﺪ و اﺛﺮات ﻋﻤﺪه اي ﺑﺮ ﺗﻮﻟﯿﺪات ﮐﺸﺎورزي ﻣﯽ ﮔﺬارد. روي ﯾﮑﯽ از اﺳﺎﺳﯽ ﺑﺮاي رﺷﺪ ﮔﯿﺎه ﻣﯽﺑﺎﺷﻨﺪ اﻣﺎ در ﻏﻠﻈﺘﻬﺎي ﺑﺎﻻ ﺑﺮاي ﮔﯿﺎﻫﺎن ﺳﻤﯽ ﻣﯽﺑﺎﺷ. ﻨﺪ روي ﺑﺮاي ﺳﻨﺘﺰ آﻧﺰﯾﻤﻬﺎﯾﯽ ﮐﻪ در ﺳﻨﺘﺰ ﺗﺮﯾﭙﺘﻮﻓﺎن، ﮐﻪ ﭘﯿﺸﻨﯿﺎز ﺗﻮﻟﯿﺪ اﯾﻨﺪول اﺳﺘﯿﮏ اﺳﯿﺪ ﻣﯿﺒﺎﺷﺪ، ﺿﺮوري اﺳ.ﺖ اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ اﺛﺮات ﺗﻨﺶ ﺧﺸﮑﯽ و ﻧﺎﻧﻮذرات اﮐﺴﯿﺪ روي ﺑﺮ ﺟﻮاﻧﻪ زﻧﯽ ﮔﯿﺎه ﻓﺴﺘﻮﮐﺎ اوﯾﻨﺎ آزﻣﺎﯾﺶ ﻓﺎﮐﺘﻮرﯾﻞ ﺑﺮ ﭘﺎﯾﻪ ﻃﺮح ﮐﺎﻣﻼ ﺗﺼﺎدﻓﯽ در 4 ﺗﮑﺮار در ﺳﺎل 97 در ﭘﺮدﯾﺲ اﺑﻮرﯾﺤﺎن داﻧﺸﮕﺎه ﺗﻬﺮان اﻧﺠﺎم ﺷ.ﺪ ﺗﻨﺶ ﺧﺸﮑﯽ در ﺳﻄﻮح )0، 0/2- ، 0/5- و 0/8- ﻣﮕﺎﭘﺎﺳﮑﺎل( و ﻧﺎﻧﻮ ذرات اﮐﺴﯿﺪ روي در ﺳﻄﻮح )0، 20، 40 و 80 ﻣﯿﻠﯽ ﮔﺮم در ﻟﯿﺘﺮ( اﻋﻤﺎل ﺷﺪ. در اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﺗﻨﺶ ﺧﺸﮑﯽ ﺗﺎﺛﯿﺮ ﻣﺨﺮب روي ﮐﻠﯿﻪ ﺻﻔﺎت ارزﯾﺎﺑﯽ ﺷﺪه داﺷﺖ. ﺗﺎﺛﯿﺮ ﻧﺎﻧﻮ ذرات اﮐﺴﯿﺪ روي در ﻏﻠﻈﺖ 20 ﻣﯿﻠﯽ ﮔﺮم در ﻟﯿﺘﺮ ﺑﺮ ﺻﻔﺎت درﺻﺪ ﺟﻮاﻧﻪ زﻧﯽ، ﺳﺮﻋﺖ ﺟﻮاﻧﻪ زﻧﯽ و ﻃﻮل رﯾﺸﻪ ﭼﻪ ﻣﺸﺎﻫﺪه ﺷﺪ وﻟﯽ ﺗﻔﺎوت اﯾﻦ ﺗﯿﻤﺎر ﺑﺎ ﺷﺎﻫﺪ ﻣﻌﻨﯽ دار ﻧﺒﻮد.

Drought is a major environmental stress that affects plant morphology, physiology and biochemistry, causing a significant reduction in agricultural production. Zinc is one of the essentials for plant growth, but toxic to plants at high concentrations. It is essential for the synthesis of enzymes involved in the synthesis of tryptophan, which is required for the production of IAA. This study was conducted to investigate the effects of drought stress and zinc oxide nano particles on germination of Fustuca ovina. A factorial experiment based on completely randomized design with four replications conducted in 2018 at Abouraihan campus of Tehran University. Drought stress level (0, -0.2, -0.5, - 0.8 mPa) and nano particle zinc oxid (0, 20, 40, 80 mg/l) were considered. In this study, drought stress had destructive effect on all evaluated traits. Effect of zinc oxide nanoparticles at concentration of 20 mg / l on germination percentage, germination rate and root length was observed but the difference between treatments was not significant.