外源激素对沙米(Agriophyllum squarrosum)种子萌发的影响  

Effects of Exogenous Hormone on Seed Germination of Agriophyllum squarrosum

作　　者：张忠[1,2,3] 马全林 张德魁[1,2,3] 魏林源 陈芳[1,2,3] 戚福俊 ZHANG Zhong;MA Quanlin;ZHANG Dekui;WEI Linyuan;CHEN Fang;QI Fujun(Gansu Desert Control Research Institute,Lanzhou 730070;State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating,Wuwei,Gansu 733000;Gansu Minqin National Studies Station for Desert Steppe Ecosystem,Minqin,Gansu 733300)

机构地区：[1]甘肃省治沙研究所,兰州730070 [2]甘肃省荒漠化与风沙灾害防治国家重点实验室(培育基地),甘肃武威733000 [3]甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃民勤733300

出　　处：《中国农学通报》2023年第9期40-44,共5页Chinese Agricultural Science Bulletin

基　　金：甘肃省林业和草原科技创新项目“沙生经济植物沙米良种选育与产业化关键技术创新”(kjcx2021002);甘肃省自然科学基金项目“固沙先锋植物沙米对风沙流胁迫的抗逆性及响应机制”(20JR10RA466);甘肃省林业自列项目“沙生经济植物沙米优良品系的筛选”(2019kj124);中央财政林业示范推广项目“古浪县腾格里沙漠南缘植被群落及结构快速恢复与改造提升技术示范推广”([2021]ZYTG002)。

摘　　要：为了筛选促进沙米种子萌发的最佳外源激素处理方法,用不同浓度的赤霉素(GA_(3)、GA_(4+7))和ABA合成抑制剂氟啶酮(FL)进行浸种实验,分析外源激素浸种浓度和浸种时间对沙米种子萌发的影响。结果表明:(1)浓度为1.6 g/L GA_(3)、0.4 g/L GA_(4+7)和5.0μmol/L FL浸种效果最好,发芽率分别为93%、82%和100%,总体效果FL>GA_(3)>GA_(4+7)。(2)在适宜浓度下,0~24 h浸种时间内沙米种子的发芽率均随着外源激素浸种时间的延长呈增加趋势,浸种24 h发芽率最高。(3)在相同浸种时间下,FL浸种萌发率均高于GA_(3)和GA_(4+7),FL能更快破除种子休眠,促使种子快速萌发。总之,外源激素浸种不仅能提高沙米的萌发率,也极大地缩短了沙米种子的萌发进程。In order to screen out the best exogenous hormone treatment to promote the germination of Agriophyllum squarrosum,different concentrations of gibberellin(GA_(3),GA_(4+7))and ABA synthesis inhibitor fluridone(FL)were used to conduct seed soaking experiments.The effects of soaking concentration and soaking time on the germination of Agriophyllum squarrosum were studied.The results showed that:(1)the germination of Agriophyllum squarrosum was better after being soaked by 1.6 g/L GA_(3),0.4 g/L GA_(4+7)and 5.0μmol/L FL,the germination rate was 93%,82%and 100%,respectively,and the overall effect was FL>GA_(3)>GA_(4+7);(2)at the optimum concentration,the germination rate of Agriophyllum squarrosum increased with the prolonging of the seed soaking in exogenous hormones within the soaking time of 0-24 h,and the germination rate was the highest at the soaking time of 24 h;(3)under the same seed soaking time,the germination rate under FL was higher than that under GA_(3)and GA_(4+7),and FL could break seed dormancy faster and promote rapid seed germination.In short,soaking seeds with exogenous hormones can not only improve the germination rate of Agriophyllum squarrosum,but also greatly shorten the germination process.

关 键 词：沙米 GA_(3) GA_(4+7) 氟啶酮(FL) 浸种浓度 浸种时间 种子萌发 

分 类 号：Q14[生物学—生态学]