（1.Institute of Plant Resources Research,Ningxia Academy of Agriculture and Forestry，Yinchuan,Ningxia 750002；2.Longde Ningxia County Vocational School，Guyuan，Ningxia 756300）
12 different pepper lines were used as materials，effect of low temperature and weak light on growth and photosynthetic characters in pepper strain were studied，to provide reference for greenhouse cultivation and method for resistance to weak light stress at low temperature.The results showed that，‘Longjiao 3’ pepper had minimum stem diameter，the stem diameter of the ‘Jingcai’ was the maximum with 13.78 mm,the start flower festival of of ‘63’ and ‘60’ pepper were lowest for the 7.2 section，the start flower festival of the ‘Jingcai’ pepper was the highest for the 8.8 section,the plant height of‘70’ pepper was the lowest of 55.8 cm，the plant height of ‘74’ pepper was the highest of 115.6 cm，strain amplitude of ‘63’ pepper was the smallest of 38.4 cm，the maximum amplitude of the ‘Jingcai’ pepper was 60.4 cm，the total chlorophyll content of ‘48’ was 62.23 mg/g，the total chlorophyll content of ‘121-7’ was 47.04 mg/g，the concentrations of intercellular CO2 of ‘70’ and ‘55’ pepper leaves were the highest of 514 μmol/mol and 513 μmol/mol respectively,‘Longjiao No.3’ leaf intercellular CO2 concentration decreased to the the lowest 391 μmol/mol，the net photosynthetic rate of pepper leaves was the highest in ‘70’ pepper，the net photosynthetic rate of pepper leaves was the lowest in ‘63’，‘60’ and ‘48’，which were between 0.34 and 0.70 μmol?m-2?s-1,the stomatal conductance of pepper leaves was the highest in ‘67’ peppers，the stomatal conductance of pepper leaves were the highest in ‘74’，‘60’，‘70’ peppers，between 51.4 and 498.0 mol?m-2?s-1，the transpiration rate of pepper leaves was the highest in ‘74’ and ‘67’，respectively 5.54 and 5.16 mmol?m-2?s-1，‘60’，‘62-6’ and ‘63’ pepper leaf transpiration rate were the lowest，respectively of 2.06，2.20，2.24 mmol?m-2?s-1.
References:
Effect of Low Temperature and Weak Light on Growth and Photosynthetic Characters of Different Pepper Strains