摘要
为阐明黑果枸杞光合特性,采用Li-6400光合作用测定系统,对移栽到同一环境条件下的不同种源黑果枸杞的光合日变化规律及光响应曲线进行了测定,并利用非直角双曲线模型对10个种源黑果枸杞光合作用生理参数进行拟合。结果表明:不同种源间黑果枸杞叶绿素含量差异显著(p<0.05),叶绿素a/叶绿素b的比值在2.311-2.769之间。不同种源的黑果枸杞在净光合速率、蒸腾速率、胞间CO2浓度及水分利用效率之间具有相似的变化趋势,但不同种源间这些参数日变化在同一时间段差异显著(p<0.05)。光合速率日变化规律为双峰曲线,第一峰值出现在9:00-10:00,第二次峰值出现在13:00-14:00。不同种源黑果枸杞的AQY在0.028-0.043之间;最大光合速率在9.004-32.046μmol·m^(-2)·s^(-1)之间,不同种源间最大光合速率之间差异显著,金塔黑果枸杞最大光合速率最大为32.046μmol·m^(-2)·s^(-1),大武口最大光合速率最小为9.004μmol·m^(-2)·s^(-1);暗呼吸速率在1.8503-6.5487μmol·m^(-2)·s^(-1)之间,光补偿点在153.6761-290.3694μmol·m^(-2)·s^(-1)之间,光饱和点在678.959-1382.839μmol·m^(-2)·s^(-1)之间,这说明黑果枸杞对强光适应能力较强,适宜在光照充足的地区栽培。
The aim of this study was to reveal the photosynthetic characteristics of Lycium ruthenicum.Diurnal changes in photosynthetic rate and the light response curves of 10 provenances of Lycium ruthenicum that grew in same environment were measured with Li-6400,and parameters of photosynthesis were simulated by non-rectangle hyperbolae function.The result showed that the chlorophyll content of L.ruthenicum from different provenances was significantly different（ p 0.05）,and the ratio of chlorophyll a and chlorophyll b was between 2.311-2.769.There was a similar trend in photosynthetic rate,transpiration rate,intercellular CO2 concentration and water use efficiency among different provenances,but the diurnal variation of these parameters varied significantly among different provenances at the same time.Photosynthetic rate change rule was bimodal curve and its first peak appeared at 9： 00-10： 00,the second peak appeared at 13： 00-14： 00.The AQY of different provenances was between 0.028-0.043,the maximum photosynthetic rate of Jinta was 32.046μmol·m-（-2）·s-（-1） and the minimum photosynthetic rate of Dawukou was 9.004μmol·m-（-2）·s-（-1）.The photosynthetic rate was significantly different among different provenances.The dark respiration rate was between 1.8503-6.5487μmol·m-（-2）·s-（-1）,the light compensation point was between 153.6761-290.3694μmol·m-（-2）·s-（-1）,and the light saturation point was between 678.959-1382.839μmol·m-（-2）·s-（-1）.These show that L.ruthenicum has strong adapting ability to hard light so that it is suitable for cultivation in sunny areas.
作者
马彦军
王亚涛
杨万鹏
马瑞
MA Yanjun;WANG Yatao;YANG Wanpeng;MA Rui(Forestry College, Gansu Agriculture University, Lanzhou 730070, Chin)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2018年第6期155-159,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金(31560215
31760244)
博士后科学基金(2017M613295XB)
甘肃省科技支撑项目(144NKCA045)
甘肃农业大学青年研究生指导教师扶持基金项目(GAU-QNDS-201404)资助
关键词
黑果枸杞
光合作用
日变化
Lycium ruthenicum
photosynthesis
diurnal variation
