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The effects of different levels of CaCl2on photosynthesis under low night temperature(8°C)stress in peanuts were studied in order to find out the appropriate concentration of Ca2+through the artificial climate chamber potted culture test.The results indicated that Ca2+,by means of improving the stomatal conductivity of peanut leaves under low night temperature stress,may mitigate the decline of photosynthetic rate in the peanut leaves.The regulation with 15 mmol L-1CaCl2(Ca15)was the most effective,compared with other treatments.Subsequently,the improvement of Ca2+on peanut photosynthesis under low night temperature stress was validated further through spraying with Ca15,Ca2+chelator(ethylene glycol bis(2-aminoethyl)tetraacetic acid;EGTA)and calmodulin antagonists(trifluonerazine;TFP).And CaM(Ca2+-modulin)played an important role in the nutritional signal transduction for Ca2+mitigating photosynthesis limitations in peanuts under low night temperature stress.
The effects of different levels of CaCl2 on photosynthesis under low night temperature (8 ° C) stress in peanuts were studied in order to find out the appropriate concentration of Ca2 + through the artificial climate chamber potted culture test. The results indicated that Ca2 +, by means of improving the stomatal conductivity of peanut leaves under low night temperature stress, may mitigate the decline of photosynthetic rate in the peanut leaves. regulation with 15 mmol L-1 CaCl2 (Ca15) was the most effective, compared with other treatments. improvement of Ca2 + on peanut photosynthesis under low night temperature stress was validated further by spraying with Ca15, Ca2 + chelator (ethylene glycol bis (2-aminoethyl) tetraacetic acid; EGTA) and calmodulin antagonists (TFP) -modulin) played an important role in the nutritional signal transduction for Ca2 + mitigating photosynthesis limitations in peanuts under low night temperature stress.