杭椒采收期内辣椒素类物质和维生素C的动态变化

  目的  研究杭椒Capsicum annuum ‘Hangzhou Jizhua’בJilin Zaojiao’果实辣椒素、维生素C等物质在采收期的动态变化，以确定最佳采收期。  方法  选取4个常见杭椒品种，采用高效液相色谱法分别测定开花后14、21、28、35、42、49、56 d采收的果实中辣椒素、二氢辣椒素和维生素C以及干物质质量分数。  结果  采收期内4个杭椒品种果实辣椒素类物质质量分数不同，品种间差异显著(P＜0.05)；维生素C质量分数和干物质相对含量随果实成熟度增加而升高。  结论  花后49 d是杭椒果实最佳采收期，此时果实成熟度好，辣椒素类物质、维生素C质量分数和干物质相对含量均较高。采收期内不同品种辣椒素类物质质量变化差异大，具体采收计划应综合种植品种、市场需求和供求关系等多方面因素考虑。图4表3参27

Dynamic changes of capsaicinoids and vitamin C contents in Hangzhou pepper during the harvesting period

  Objective  This study is aimed to determine the dynamic changes of capsaicinoids, vitamin C and dry matter contents in the fruit of Hangzhou pepper (Capsicum annuum ‘Hangzhou Jizhua’בJilin Zaojiao’) during the harvest period.  Method  Contents of capsaicin, dihydrocapsaicin, vitamin C and dry matter in the fruit of four common cultivars of Hangzhou pepper harvested at different times (14, 21, 28, 35, 42, 49, 56 days after flowering) were measured by HPLC.  Result  Content of capsaicinoids fluctuated during the harvest period and varied among four cultivars, while the contents of vitamin C and dry matter increased with fruit ripening.  Conclusion  Around 49 days after flowering is the best pepper harvest time in terms of fruit maturity, and the contents of capsaicinoids, vitamin C and dry matter. Since the dynamic changes of capsaicinoids content varied among cultivars, the optimum harvesting planning should take into consideration various factors such as pepper varieties, market demand and supply-demand relationship. [Ch, 4 fig. 3 tab. 27 ref.]