低温对茄子根吸收面积和可溶性糖质量浓度的影响

为研究低温对茄子(Solanum melongena L.)根吸收面积和可溶性糖质量浓度的影响,选取耐低温性不同的6份材料进行低温处理,前2 d内白天15℃,夜间10℃,光照度4 000 lx,从第3天开始白天10℃,夜间7℃,光照度4 000 lx,再连续处理10 d.调查不同品种茄子的耐低温性及根系总吸收面积、活跃吸收面积、比表面积、可溶性糖质量浓度的变化,结果表明,不同品种茄子总吸收面积、活跃吸收面积、比表面积、可溶性糖质量浓度在常温下差异不显著,但低温处理以后差异均达极显著(P<0.01),根系活

Effects of low temperature on absorption area and soluble sugar mass concentration in eggplant

To study the absorption area and soluble sugar concentration of Solanum melongena L. root under low temperature, six materials with different cold resistance were low-temperature treated with 4 000 lx lighting 15/10 ℃ in day/night for 2 days, 4 000 lx lighting 10 ℃/7 ℃ in day/night for 10 days. Several characters such as absorption area, active absorption area, ratio surface area, soluble sugar concentration were investigated. The results indicated that normal temperature had no significant in- fluence on these characters. Low temperature extremely significantly influenced on these characters （P 〈 0. 01 ）. Root vitality decreased and soluble sugar concentration increased after the low temperature treatment. Correlation analysis showed that chilling tolerance was significant positive partial correlation with absorption area and soluble sugar concentration （P 〈0. 01 ）. It could be concluded that the growth of eggplant seedlings were negatively influenced by low temperature stress, but the metabolism could ad- just themselves to avoid low temperature harms.