CAJ | 학술논문

采用营养液栽培法，研究了20℃、25℃、30℃、35℃4个根际温度处理5 d 后黄瓜幼苗生长、光合和叶绿素荧光参数的变化。结果显示：黄瓜幼苗在25℃的根际温度中生长量最大，相对叶绿素含量（SPAD）、根系活力、叶片净光合速率（Pn ）、光系统Ⅱ（PSⅡ）反应中心的光能捕获效率（Fv′？Fm′）、PSⅡ的实际光化学效率（ΦPSⅡ）以及光化学猝灭系数（qP）在4个处理中均为最大，PSⅡ激发能压力（1－qP）及 PSⅠ、PSⅡ间激发能分配的不平衡性（β？α－1）均为最小；35℃处理下各参数则表现为相反趋势；25℃处理下，PSⅡ吸收的光能用于光化学反应的比例（P）最大，而35℃下吸收的光能用于天线热耗散的比例（D）最大，达70．2％。试验表明，黄瓜幼苗最适宜于25℃的根际环境，温度过高或过低都会影响其生长，且高温影响尤为严重。
채용영양액재배법，연구료20℃、25℃、30℃、35℃4개근제온도처리5 d 후황과유묘생장、광합화협록소형광삼수적변화。결과현시：황과유묘재25℃적근제온도중생장량최대，상대협록소함량（SPAD）、근계활력、협편정광합속솔（Pn ）、광계통Ⅱ（PSⅡ）반응중심적광능포획효솔（Fv′？Fm′）、PSⅡ적실제광화학효솔（ΦPSⅡ）이급광화학졸멸계수（qP）재4개처리중균위최대，PSⅡ격발능압력（1－qP）급 PSⅠ、PSⅡ간격발능분배적불평형성（β？α－1）균위최소；35℃처리하각삼수칙표현위상반추세；25℃처리하，PSⅡ흡수적광능용우광화학반응적비례（P）최대，이35℃하흡수적광능용우천선열모산적비례（D）최대，체70．2％。시험표명，황과유묘최괄의우25℃적근제배경，온도과고혹과저도회영향기생장，차고온영향우위엄중。
The effects of 20 ℃,25 ℃,30 ℃,35 ℃ root-zone temperature gradient on the growth,photo-synthesis and chlorophyll fluorescence characteristics of cucumber seedlings were investigated by nutrient solution culture method.The results showed that the seedlings had the largest amount of growth in 25 ℃ root-zone temper-ature,the relative chlorophyll content(SPAD),root activity,net photosynthetic rate(Pn ),excitation energy cap-ture efficiency of photosystem Ⅱ(PSⅡ)reaction center(Fv′?Fm′),actual photochemical efficiency of PSⅡ(ΦPSⅡ)and photochemical fluorescence quenching coefficient(qP)were the maximum in 4 treatments and the excited energy pressure of PSⅡ(1 -qP),partition imbalance of excited energy between PSⅠ and Ⅱ(β?α-1)were the minimum after treated 5 days,while the parameters showed a contrary tendency under 35 ℃ treatment.The pro-portion of absorbed light energy used for photochemical reaction(P)at 25 ℃ was the biggest,while the proportion of absorbed light energy used for antenna heat dissipation(D)at 35 ℃ was the highest,reaching up to 70.2%. The results suggested that the most suitable root-zone temperature for cucumber seedling was 25 ℃,higher or lower temperature would affect its growth,and the influence of high temperature was more serious.