中国农学通报2025，Vol.41Issue(34)：53-62,10.
红光光照时长对凉粉草插条生理生化特性和品质的影响
Effect of Red Lighting Duration on Physio-biochemical Characteristics and Quality of Cuttings from Platostoma palustre
摘要
Abstract
The suitable light duration for the growth and quality improvement of Platostoma palustre was determined,which provided a scientific basis for the standardized and large-scale cultivation of P.palustre.An artificial red LED light source was employed with a 12-hour photoperiod as a control to assess the impact of supplemental red lighting duration(18 hours)on plant height,biomass,root development,root vitality,soluble protein content,SOD activity,flavonoid content,soluble sugar content,and soluble pectin content of four P.palustre germplasms(TW,LS,GD and YN).The results showed that increasing the duration of supplemental red lighting promoted adventitious root growth in P.palustre cuttings,leading to root elongation,an expanded root absorption area,well-developed roots,and enhanced root vitality.This enhancement facilitated nutrient absorption in P.palustre,subsequently promoting the growth and development of its aboveground parts.The stem and leaf of TW,LS,GD and YN exhibited an increase in fresh weight by 19.36%,49.33%,1.73%,and 24.01%,respectively.Compared to the control,supplemental red lighting duration resulted in a reduction in flavonoid content for TW,LS and YN,a significant decrease in soluble sugar and pectin content;while GD showed a significant increase in flavonoid content by 42.32%,with no significant changes in soluble sugar and pectin content.Increasing the duration of red light exposure could enhance the growth and development of four types of P.palustre cuttings.However,there were variations in the response and light requirements among different P.palustre germplasms.Following red light supplementation,GD was suitable for cultivation,with significant improvements in growth and flavonoid content.关键词
凉粉草/LED光源/红光光照时长/扦插/生根/黄酮/可溶性糖/种质特异性Key words
Platostoma palustre/LED light source/red lighting duration/cuttings/rooting/flavonoid/soluble sugar/germplasm specificity分类
农业科技引用本文复制引用
徐梅华,全昌乾,韦范,汤丹峰..红光光照时长对凉粉草插条生理生化特性和品质的影响[J].中国农学通报,2025,41(34):53-62,10.基金项目
广西重点研发计划"广西区域特色药食同源植物凉粉草新种质创制及高胶质提升技术研究"(桂科AB24010015) （桂科AB24010015）
国家自然科学基金"红光介导PpRAV1转录因子调控凉粉草多糖生物合成的分子机制研究"(82460754) （82460754）
广西药用资源保护与遗传改良重点实验室自主课题"凉粉草根系细胞壁果胶形态和去甲酯化修饰对Cd积累的影响"(KL2025ZZ04) （KL2025ZZ04）
国家自然科学基金"仙草半乳糖醛酸合成关键酶GAE的筛选及功能研究"(82260750). （82260750）
