【摘要】 对脱毒裂萼草莓的叶绿素含量、生长温度、光强及叶绿素荧光参数变化进行了研究.结果表明:脱毒裂萼草莓叶绿素含量为2.885 mg/g.fw,较病叶提高了21.58%;在光强为0~2 000μmol.m-2.s-1范围内,净光合速率(Pn)随光强的增加而增加,直到光饱和点,最大值为10.5μmol CO2.m-2.s-1;在温度为0~17℃时,Pn随温度增加而升高,17~40℃时,Pn随温度增加而下降,测出其最适生长温度为17℃左右;叶绿素荧光参数Fv/Fm变化较小.更多还原

【Abstract】 The changes of chlorphyll contents,growing temperature,the light intensity and fluorescence parameters of the virus_free Fragaria daltoniana were studied.The result showed that chlorophyll contents of the virus_free Fragaria daltoniana was 2.885 mg/g·fw,and increased by 21.58% compared with the control.Within the range of 0～2 000 μmol·m^-2·s^-1,the net photosynthetic rate increased with the increase of the light intensity,the peak value was 10.5 μmol·m^-2·s^-1 at 2 000 μmol·m^-2·s^-1.Pn raised within 0～17℃ while it reduced within 17～40℃.From this experiment,we found that the most suitable growing temperature for strawberry was about 17℃.Chorophyll fluorescence parameter showed that the Fv/Fm had little change.更多还原