中国农学通报2025，Vol.41Issue(16)：28-34,7.
温度对娃娃菜幼苗生长及光合生理特性的影响
Effects of Temperature on Growth,Physiology and Photosynthetic Characteristics of Brassica pekinensis Seedlings
摘要
Abstract
The growth,physiological and photosynthetic characteristics of Brassica pekinensis seedlings under different temperature conditions were analyzed to determine the optimal temperature range for their growth.Taking B.pekinensis'Cold-resistant Golden Empress'as test material,a completely randomized block design was used to set up eight temperature treatments of 0,5,10,15,20,25(control),30 and 35℃.The plant height,root diameter,chlorophyll content,superoxide dismutase(SOD)activity,peroxidase(POD)activity,malondialdehyde(MDA)content,net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr),intercellular CO2 concentration(Ci)were measured.The results showed that the seedlings began to die at 0℃.The plant height and root collar diameter increased slowly at 5-15℃and 30-35℃.At 20℃,the plant height and root collar diameter were the largest,and the growth was good.The chlorophyll content,SOD activity and POD activity in the plant showed a trend of increasing first and then decreasing,and the MDA activity showed a trend of decreasing first and then increasing.With the change of time,Tr,Gs,Pn and Ci of B.pekinensis showed an upward trend.The Pn reached the maximum at 20℃,and the Gs,Tr and Ci of B.pekinensis seedlings were the largest at 35℃.Temperature lower than 20℃or higher than 25℃would affect the growth of B.pekinensis seedlings,resulting in a decrease in leaf enzyme activity and photosynthetic capacity.The optimum temperature range for the growth of B.pekinensis seedlings was 20-25℃,and the plant morphogenesis,physiological metabolism and photosynthetic performance were the best in this range.关键词
娃娃菜/幼苗/温度/生理特性/光合参数/生长指标/胁迫/抗逆性Key words
Brassica pekinensis/seedlings/temperature/physiological characteristics/photosynthetic parameters/growth index/duress/resistance分类
农业科技引用本文复制引用
鄂利锋,姚芙蓉,陈修斌,权建华,华军,尹丽娟,赵文勤..温度对娃娃菜幼苗生长及光合生理特性的影响[J].中国农学通报,2025,41(16):28-34,7.基金项目
甘肃省科技计划(技术创新引导计划)项目"张掖市订单蔬菜绿色高效关键技术研究与示范"(24CXNG006) （技术创新引导计划）
甘肃省农业农村厅农业科技支撑项目"张掖市高原夏菜绿色高效生产关键技术集成与示范"(KJZC-2024-27). （KJZC-2024-27）
