اﺛﺮ ﺗﻨﺶ ﮔﺮﻣﺎ ﺑﺮ ﮐﻠﺮوﻓﯿﻞ و ﮐﺎروﺗﻨﻮﺋﯿﺪ در ﺑﺮﺧﯽ ارﻗﺎم ﮐﻠﺰا

Effect of heat stress on chlorophyll and carotenoids in some rapeseed cultivars

اﯾﻦ آزﻣﺎﯾﺶ ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ اﺛﺮ ﮔﺮﻣﺎ در ﻣﺮﺣﻠﻪ ﮔﻠﺪﻫﯽ ﺑﺮ ﺧﺼﻮﺻﯿﺎت ﻓﺘﻮﺳﻨﺘﺰي در 9 رﻗﻢ ﮐﻠﺰا در ﻣﺰرﻋﻪ ﺗﺤﻘﯿﻘﺎﺗﯽ داﻧﺸﮑﺪه ﮐﺸﺎورزي داﻧﺸﮕﺎه ﺷﻬﯿﺪ ﭼﻤﺮان اﻫﻮاز در ﻗﺎﻟﺐ ﻃﺮح ﭘﺎﯾﻪ ﺑﻠﻮك ﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ در دو ﺗﺎرﯾﺦ ﮐﺎﺷﺖ )دو آزﻣﺎﯾﺶ ﺟﺪاﮔﺎﻧﻪ ﺷﺎﻣﻞ 20 آﺑﺎن و 20 دي( در ﺳﻪ ﺗﮑﺮار در ﺳﺎل زراﻋﯽ 1397-98 اﺟﺮا ﺷ. ﺪ در اﯾﻦ ﭘﮋوﻫﺶ ﺻﻔﺎﺗﯽ ﭼﻮن ﻏﻠﻈﺖ ﮐﺮوﻓﯿﻞ، ﻏﻠﻈﺖ ﮐﺎروﺗﻨﻮﺋﯿﺪ و ﻣﯿﺰان ﺳﺒﺰﯾﻨﮕﯽ )SPAD( اﻧﺪازه ﮔﯿﺮي ﺷﺪ. ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﺘﺎﯾﺞ ﺑﻪ دﺳﺖ آﻣﺪه ﻣﺸﺨﺺ ﺷﺪ ﮐﻪ ﺑﯿﺸﺘﺮﯾﻦ ﻏﻠﻈﺖ ﮐﻠﺮوﻓﯿﻞ در ﺷﺮاﯾﻂ ﻧﺮﻣﺎل در ارﻗﺎم ﻫﺎﯾﻮﻻ 4815 )1/85(، ﻫﺎﯾﻮﻻ 50 )1/67(، ﺳﺎﻟﺴﺎ )1/62( و ﺗﺮاﭘﺮ )1/56( و ﮐﻤﺘﺮﯾﻦ ﻏﻠﻈﺖ در ﺷﺮاﯾﻂ ﺗﻨﺶ در رﻗﻢ ﻫﺎﯾﻮﻻ 401 ﺑﻪ ﻣﯿﺰان 0/577 ﻣﯿﻠﯽ ﮔﺮم ﺑﺮ ﮔﺮم وزن ﺗﺮ ﻧﻤﻮﻧﻪ وﺟﻮد داﺷﺖ. ﻫﻤﭽﻨﯿﻦ ﺑﯿﺸﺘﺮﯾﻦ ﻏﻠﻈﺖ ﮐﺎروﺗﻨﻮﺋﯿﺪ ﻧﯿﺰ در ارﻗﺎم ﻫﺎﯾﻮﻻ 4815 ﺑﻪ ﻣﯿﺰان 0/636 و ﺗﺮاﭘﺮ )0/630(، ﺳﺎﻟﺴﺎ )0/611(، ﻫﺎﯾﻮﻻ 50 )0(/535 در ﺷﺮاﯾﻂ ﻧﺮﻣﺎل و ﮐﻤﺘﺮﯾﻦ ﻏﻠﻈﺖ در رﻗﻢ ﻫﺎﯾﻮﻻ 401 ﺑﻪ ﻣﯿﺰان 0/220 ﻣﯿﻠﯽ ﮔﺮم ﺑﺮ ﮔﺮم وزن ﺗﺮ ﻧﻤﻮﻧﻪ در ﺷﺮاﯾﻂ ﺗﻨﺶ ﺑﺪﺳﺖ آﻣ.ﺪ در ﺧﺼﻮص ﻣﯿﺰان ﺳﺒﺰﯾﻨﮕﯽ، ﺑﯿﺸﺘﺮﯾﻦ ﻣﻘﺪار در ارﻗﺎم ﻫﺎﯾﻮﻻ 4815 )49/26( و ﻫﺎﯾﻮﻻ 50 )48/76( در ﺷﺮاﯾﻂ ﻧﺮﻣﺎل و ﮐﻤﺘﺮﯾﻦ ﻣﻘﺪار را ﻧﯿﺰ در رﻗﻢ ﻫﺎﯾﻮﻻ 4815 در ﺷﺮاﯾﻂ ﺗﻨﺶ )40/95( ﻣﺸﺎﻫﺪه ﺷﺪ.

In this experiment the effects of heat stress in flowering stage on photosynthetic properties of 9 rapeseed cultivars at research farm of Shahid Chamran University of Ahvaz under a randomized complete block design with two sowing dates (two separate experiments, November 20 and January 20) and three replications between 2018 and 2019 was investigate. The traits such as Chlorophyll concentration, Carotenoid concentration and Vegetation level (SPAD) were measured. The results showed that the highest concentration of chlorophyll under normal conditions were in Hyola 4815 (1.85), Hayola 50 (1.67), Salsa (1.62) and Trapar (1.56) and the lowest concentration in Hyola 401 with 0.557 mg / g fresh weight under stress condition. Also, the highest concentration of carotenoids was found in Hyola 4815 (0.636) and Trapper (0.630), Salsa (0.611), Hyola 50 (0.535) under normal conditions and the lowest concentration in Hyola 401 0.22 mg / g fresh weight under stress condition. Regarding the vegetation level (SPAD), the highest values were observed in Hyola 4815 (49.26) and Hyola 50 (48.76) and the lowest in stress condition (40.95). It seems that Hyola 4815 and Hyola 401 are the most tolerant and sensitive cultivars respectively.