光强对耐荫差异普通钝叶草(Stenotaphrum helferi)种质的形态与生理差异分析  

Effects on Different Shading Intensity on the Morphology and Physiology of Stenotaphrum helferi Accessions with Significant Differences in Shade Tolerance

作　　者：杨娟[1] 王志勇[2] 郭海林[3] 丁西朋 杨虎彪[4] 吴杨[5] 廖丽[1] YANG Juan;WANG Zhiyong;GUO Hailin;DING Xipeng;YANG Hubiao;WU Yang;LIAO Li(Institute of Tropical Crops,Hainan University,Haikou,Hainan 570228,China;Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants,Ministry of Education/College of Forestry,Hainan University,Haikou,Hainan 570228,China;Institute of Botany,Jiangsu Province and Chinese Academy of Sciences/Nanjing Botanical Garden,Mem.Sun Yat-Sen,Nanjing,Jiangsu 210014,China;Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences,Danzhou,Hainan 571737,China;College of Life Science,Jinggangshan University,Ji’an,Jiangxi 343009,China)

机构地区：[1]海南大学热带作物学院,海南海口570228 [2]热带特色林木花卉遗传与种质创新教育部重点实验室/海南大学林学院,海南海口570228 [3]江苏省中国科学院植物研究所/南京中山植物园,江苏南京210014 [4]中国热带农业科学院热带作物品种资源研究所,海南儋州571737 [5]井冈山大学生命科学学院,江西吉安343009

出　　处：《热带作物学报》2020年第12期2454-2461,共8页Chinese Journal of Tropical Crops

基　　金：国家自然科学基金项目(No.31560564);科技基础资源调查专项“中国南方草地牧草资源调查”(No.2017FY100600)。

摘　　要：对2个耐荫性具有显著(P<0.05)差异的普通钝叶草(Stenotaphrum helferi)品系S17(耐荫强)与S34(耐荫弱)设置3个不同程度(自然光照、70%自然光照、25%自然光照)遮光处理,对其形态及生理生化差异进行分析。结果表明,经遮荫处理后耐荫性强的S17相对叶长、相对叶宽、相对绿色覆盖度、相对草坪密度、相对坪用质量、相对地上干物重及相对光合色素含量均显著(P<0.05)高于耐荫性弱的S34,且重度胁迫显著(P<0.05)高于轻度胁迫;遮荫后S17的相对叶绿素a/b逐渐增加,而S34逐渐降低;重度遮荫后,相对可溶性糖及相对可溶性蛋白含量显著(P<0.05)低于轻度胁迫,其中S17显著(P<0.05)高于S34。本研究对今后开展普通钝叶草耐荫新品种选育和QTL定位提供参考。Three shading treatment,natural light,70%natural light and 25%natural light,was applied to two Stenotaphrum helferi accessions with significant difference in shade tolerance.The morphological,physiological and biochemical characteristics of S.helferi were analyzed.The relative leaf length,relative leaf width,relative green coverage,relative turf density,relative turf quality,relative dry matter weight and relative photosynthetic pigment contents of S17 with strong shade tolerance were significantly higher than those of S34 with shade sensitive,and those of severe stress were significantly higher than those of light stress.The relative chlorophyll a/b of S17 increased gradually,while S34 decreased gradually after shade.The content of relative soluble sugar and relative protein was significantly lower than that of nature light,and S17 with strong shade tolerance was higher than S34 with shade sensitive.This study would provide a reference for future breeding and QTL mapping of new shade-tolerant cultivars.

关 键 词：普通钝叶草 耐荫性 形态 生理 

分 类 号：S688.4[农业科学—观赏园艺]