茄子耐低温弱光鉴定方法初探

Preliminary Study on Methods of Determining the Tolerance of Eggplant to Low Temperature and Low Light

以7个耐低温弱光特性不同的茄子为试验材料,研究了低温发芽率、发芽指数、活力指数、幼苗冷害指数、细胞质膜相对透性、遮光处理后幼苗干重、茎粗、株高、叶面积、叶绿素相对含量和光合特性的变化,认为在17.5℃时144h的发芽率、0～1℃时幼苗冷害指数、10℃/20℃细胞质膜相对透性、遮光处理1个月后幼苗干重、茎粗、叶绿素相对含量及光照强度为250μmol·m-2·s-1和500μmol·m-2·s-1时净光合速率可作为茄子耐低温、耐弱光性能的鉴定指标。

The experiments of seven eggplant varieties with different characters of low temperature and low light were carried out in order to study their changes in germination, vigor, cold injury, relative permeability of cytomembrane, dry weight, stem diameter, plant height, leaf area, relative chlorophyll content and photosynthetic rate of seedling under different temperature and illumination. The results showed that germination rate at 17.5℃ for 144h, cold injury index of seedling at 0～1℃ and relative electric conductivity at 5℃ and 20℃ as well as the dry weight, stem diameter and relative chlorophyll content of seedling and the net photosynthetic rate at light intensity of 250μmol·m^(-2)·s^(-1) and 500μmol·m^(-2)·s^(-1) after shading treatment for one month could be used as the indexes of determining the tolerance of eggplant to low temperature and low light.