摘要
以耐冷性不同的茄子单性结实材料(D-11)和非单性结实材料(00-13)幼苗为试验材料,在人工气候室内进行低温(5℃)处理,研究了低温胁迫对茄子幼苗叶片光合特性和叶绿素荧光参数的影响。结果表明:随着低温胁迫时间的延长,幼苗叶片的净光合速率下降,胞间CO2浓度先升高后降低,蒸腾速率和气孔导度则先下降后增加;最大光化学效率、光合电子传递速率和光化学猝灭系数普遍降低,而非光化学淬灭系数具有升高的趋势。单性结实材料叶片吸收的光能中用于有效电子传递的比例较高,光合受抑程度较轻;耐性差的材料电子传递速率下降明显,过剩激发能高,光合活性受损较严重,光合作用能力减弱幅度较大。
Taking the eggplant parthenocarpy （ D-11 ） and non-parthenocarpy （00-13） seedlings of different cold tolerance as materials, low temperature （5 ℃ ） stress was treated in the artificial climate chamber, and the effects of low temperature on photosynthetic characteristics and chlorophyll fluorescent parameters of eggplant seedlings were studied. The results showed that the net photosynthetic rate was decreased, the intercellular CO2 concentration was increased in the former stage （ before 2 days） then decreased （ after 2 days）, the transpiration rate and stomatal conductance were decreased first and then increased in leaves of eggplant seedlings with the prolongation of the low temperature stress time. The maximal photochemical efficiency, photosynthetic electron transport rate, photochemical quenching coefficient were generally decreased, and non photochemical quenching coefficient in leaves of eggplant seedlings was increased slowly. It suggested that the proportion of the light energy absorbed by leaf of parthenocarpy material for efficient electron transfer was higher, and photosynthesis of that was inhibited to a lesser degree. The electron transfer rate of poor tolerance material was decreased significantly, excess excitation energy of that was higher, photosynthetic activity was more serious damaged, and photosynthetic capacity was decreased greatly.
出处
《河北农业科学》
2012年第10期40-43,47,共5页
Journal of Hebei Agricultural Sciences
基金
河北省自然科学基金项目(C2010001595)
河北省科技厅计划项目(11220102D-2)
国家大宗蔬菜产业技术体系石家庄综合试验站项目(CARS-25-G-05)
关键词
茄子
单性结实
低温胁迫
光合作用
叶绿素荧光
Eggplant
Parthenocarpy
Low temperature stress
Photosynthesis
Chlorophyll fluorescence
作者简介
高秀瑞（1973-），男，河北衡水人，副研究员，硕士，主要从事茄子育种及其有关生理基础研究。Tel：0311—87652102；E-mail：shijiaga073@126．com。
通讯作者：潘秀清（1963-），女，河北泊头人，研究员，主要从事茄子和西瓜育种研究。Tel：0311—87652102；E—mail：panxiuqing63@126．com。
