摘要
为了解艾纳香种子的生物学特性,探讨硝酸钾、氯化钙、IAA、温度和贮藏时间等因素对艾纳香种子萌发的影响,以艾纳香种子为材料,测定其千粒重、大小及含水量,比较分析不同硝酸钾、氯化钙、IAA、温度、贮藏时间等条件下种子发芽势、发芽率和根长.结果表明:艾纳香种子细小,无休眠现象;25℃条件下,贮藏时间超过 70 d,发芽率快速降低,4℃条件下贮藏 340 d种子发芽率不降低;500、1 000 mg/L硝酸钾溶液和 200 mg/L氯化钙溶液浸种能显著提高艾纳香种子发芽势、发芽率、根长;40℃温水浸种能够显著提高种子发芽率,超过 60℃种子失去发芽能力.因此,艾纳香种子最佳贮藏温度为 4℃,在此条件下,以 500 mg/L硝酸钾浸泡种子 12 h能有效提高发芽率.
Abstract
The effects of potassium nitrate,calcium chloride,IAA,temperature,and storage time on seed germination were studied to understand the biological characteristics of Blumea balsamifera seeds.The germination potential,germination rate,and root length of the B.balsamifera seeds were compared under potassium nitrate,calcium chloride,IAA,temperature,and storage time treatments.The results showed that B.balsamifera seeds were petite and had no dormancy.The germination rate of seeds stored for more than 70 d at 25℃decreased rapidly,and the germination rate of seeds stored for 340 d at 4℃did not decrease.The seeds soaking in 500,1 000 mg.L‒1 potassium nitrate solution and 200 mg.L‒1 calcium chloride solution sig-nificantly improved the seed germination potential,germination rate,and root length.The soaking of seeds at 40℃signifi-cantly increased the germination rate of the seeds,and at temperatures greater than 60℃,the seeds lost their germination abil-ity.Therefore,the optimum storage temperature for B.balsamifera seeds is 4℃,and the germination rate can be effectively improved by soaking the seeds in 500 mg.L‒1 potassium nitrate for 12 h under these conditions.
基金项目
广州市科技计划项目(202102021255)
广东省中医药局基础与应用基础研究项目(20211065)
广东省科技专项资金("大专项+任务清单")项目(2019B020402)
NETL
NSTL
万方数据