几种环境因子对崖州硬皮豆种子萌发的影响  

Effects of several environmental factors on seed germination of Macrotyloma uniflorum ‘Yazhou’

作　　者：曹敏 张瑞[1] 钟婷 虞道耿[2] 陈银华[1] 骆凯 CAO Min;ZHANG Rui;ZHONG Ting;YU Daogeng;CHEN Yinhua;LUO Kai(College of Tropical Crops,Hainan University,Haikou 570228,Hainan,China;Institute of Tropical Crop Genetic Resources,Chinese Academy of Tropical Agricultural Sciences,Danzhou 571737,Hainan,China)

机构地区：[1]海南大学热带作物学院,海南海口570228 [2]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

出　　处：《草业科学》2019年第12期3085-3092,共8页Pratacultural Science

基　　金：海南省自然科学基金(zzzz002003210990746);海南大学科研基金资助项目[KYQD(2R)1965、KYQD(2R)1966]

摘　　要：本研究运用培养皿滤纸法和盆栽法,分析了光照、温度、水分、盐分和埋藏深度等环境因子对崖州硬皮豆(Macrotyloma uniflorum‘Yazhou’)种子萌发的影响。结果表明,光照、温度及其互作显著影响种子萌发率(P<0.05),随着温度升高,种子萌发率和萌发速率(1/t50)先上升后下降,光照和黑暗条件下的最适萌发温度分别为32.8和32.4℃;种子萌发率和萌发速率(1/t50)随水势胁迫和NaCl胁迫的增加呈下降趋势,其中萌发速率(1/t50)较萌发率下降快;当渗透势和盐分浓度分别为-1.2 MPa和400 mmol·L^-1时,种子几乎不萌发;崖州硬皮豆种子在埋藏深度1 cm时出苗率最高,适宜浅播。The effects of light,temperature,water,salinity,and burial depth on seed germination of Macrotyloma uniflorum‘Yazhou’was analyzed using petri-dish and pot-culture methods in this study.The results indicated that light,temperature,and their interaction significantly affected seed germination percentage(P<0.05).Germination percentage and germination rate(1/t50)first increased and then declined with increasing temperature.The seeds of M.uniflorum‘Yazhou’could germinate between 15~40℃,but the optimum germination temperature was 32.8℃under light conditions and 32.4℃under dark conditions.With increasing PEG and NaCl stress,the germination percentage and germination rate(1/t50)gradually decreased,although germination rate(1/t50)decreased faster than did germination percentage.The seeds of M.uniflorum‘Yazhou’could not germinate when the osmotic potential and NaCl concentration reached-1.2 MPa and 400 mmol·L^-1,respectively.The seedling percentage was highest at 1 cm burial depth,indicating that M.uniflorum‘Yazhou’is possibly suitable for shallow seeding.

关 键 词：崖州硬皮豆 种子萌发 光照 温度 渗透势 盐分 埋藏深度 

分 类 号：Q945.34[生物学—植物学]