不同遮光处理对太子参苗期生长及生理特性的影响  

Effects of different shading treatments on the growth and physiological characteristics of Pseudostellariae heterophylla at seedling stage

作　　者：王艳 夏志强 李巧红 吴璇 黄丽莉[2] 郭圣茂[1] WANG Yan;XIA Zhiqiang;LI Qiaohong;WU Xuan;HUANG Lili;GUO Shengmao(College of Forestry,Jiangxi Agricultural University/Jiangxi Key Laboratory of Subtropical Forest Resources Cultivation,Nanchang Jiangxi 330045,China;Jiangxi Academy of Forestry,Nanchang Jiangxi330013,China)

机构地区：[1]江西农业大学林学院/亚热带森林资源培育江西省重点实验室,江西南昌330045 [2]江西省林业科学院,江西南昌330013

出　　处：《南方林业科学》2024年第5期25-29,共5页South China Forestry Science

基　　金：创新药物与高效节能降耗制药设备国家重点实验室项目(20231ZDD02007);国家自然科学基金项目(31560204);中央财政林业科技推广示范项目(JXTG[2020]25号);江西省林业局科技创新项目(JXYCZX[2023]010101号)。

摘　　要：为探究遮光对太子参苗期生长及生理特性的影响,对太子参进行30%、50%的遮光和全光照处理,测定不同遮光处理对太子参苗期生长及部分生理指标的影响。结果表明,随着遮光强度的增加,太子参的叶片数、分枝数、子根数、根长、生物量等生长指标均表现为先上升后下降,30%遮光处理的太子参生长最好。遮光可显著降低太子参叶片的酶活性和丙二醛含量,且均以30%遮光处理的含量最低;在30%遮光处理下太子参叶片的SOD、POD、CAT、APX酶活性和丙二醛的含量分别为129.74 U·g^(-1)、789.32 U·(g·min)^(-1)、34.82 U·(g·min)^(-1)、211.77 U·(g·min)^(-1)FW、0.06μmol·g^(-1),比对照分别降低了35.52%、31.04%、13.73%、23.77%、45.45%。30%遮光处理的叶片可溶性糖含量(69.53 mg·g^(-1))和可溶性蛋白含量(4.27 mg·g^(-1))均为最高。2种遮光处理的叶片叶绿素a和叶绿素b含量差异不显著(P>0.05),但显著高于全光照处理(P<0.05);30%遮光处理的叶片类胡萝卜素含量为0.12 mg·g^(-1),显著高于全光照处理(P<0.05)。在人工栽培过程中,遮光度控制在30%左右对太子参苗期的生长及生理最有利。In order to explore the effect of shading on the growth and physiological characteristics of Pseudostellaria heterophylla,30%and 50%shading and full light treatments were applied to determine the effects of different shading treatments on the growth and some physiological indexes of P.heterophylla.The results showed that with the increase of shading intensity,the growth indexes such as leaves number,branch number,root number,root length and biomass of P.heterophylla increased first and then decreased,and the growth of P.heterophylla was the best under 30%shading treatment.The contents of superoxide dismutase,peroxidase,catalase,ascorbate peroxidase and malondialdehyde in leaves were 129.74 U∙g^(-1),789.32 U∙(g∙min)^(-1),34.82 U∙(g∙min)^(-1),211.77 U∙(g∙min)^(-1)FW and 0.06μmol∙g^(-1),compared with the control,they decreased by 35.52%,31.04%,13.73%,23.77%and 45.45%,respectively.With the increase of shading intensity,both the soluble sugar content(69.53 mg∙g^(-1))and soluble protein content(4.27 mg∙g^(-1))of the leaves treated were the highest.The difference in chlorophyll a and chlorophyll b content between the two shading treatments was not significant(P>0.05),but significantly higher than that of the full light treatment(P<0.05).The carotenoid content in leaves treated with 30%shading was 0.12 mg·g^(-1),significantly higher than that in full light treatment(P<0.05).So,in the process of artificial cultivation,the shading degree of about 30%was the most beneficial to the growth and physiology of the seedling stage of P.heterophylla.

关 键 词：太子参 生长状况 生物量分配 抗氧化酶 渗透调节物质 光合色素 

分 类 号：S759.82[农业科学—森林经理学] S567.9[农业科学—林学]