| 摘要: |
| 锥栗(Castanea henryi)是我国南方重要的木本粮食树种和特色果树资源,具有很高的食用及药用价值。为探明最适宜锥栗种子萌发的条件,该研究以当年采收的锥栗种子为材料,探讨了温度、光照、基质、基质含水量以及破壳处理等对锥栗种子萌发的影响,为锥栗种苗繁育提供理论基础。结果表明:(1)锥栗种子萌发的最适温度是25 ℃,其最终萌发率为92.67%,在其他温度条件下,锥栗种子的萌发率有所下降,但与25 ℃条件下的萌发率无显著差异。(2)黑暗条件可缩短锥栗种子发芽时间,明显提高种子的萌发率和发芽势,但黑暗条件下的种子胚根长度显著小于周期性光照条件下的胚根长度。(3)锥栗种子在泥炭土中的萌发率和发芽势均高于在河沙中的萌发率和发芽势,且泥炭土中种子胚根长度显著长于河沙中的种子胚根长度。(4)基质含水量对锥栗种子萌发率和发芽势无显著性影响。(5)种皮的机械阻碍是限制锥栗种子萌发的因素之一,破壳处理后,锥栗种子的发芽势和胚根长度与未破壳相比差异显著,实际生产中剪破种壳能加快种子的萌发进程。 |
| 关键词: 锥栗, 种子, 环境因子, 破壳处理, 萌发 |
| DOI：10.11931/guihaia.gxzw201809007 |
| 分类号:Q945 |
| 文章编号:1000-3142(2020)02-0143-08 |
| Fund project:广西创新驱动重大专项项目(桂科AA17204058-12); 广西科技基地和人才专项项目(桂科AD17195014); 桂林市科学研究与技术开发计划项目(20150121); 广西科学院基本科研业务费项目(2018YJJ905); 广西植物研究所基本业务费项目(桂植业15010、桂植业180016); 广西植物功能物质研究与利用重点实验室自主项目(ZRJJ2017-9)[Supported by Innovation Driven Major Program of Guangxi(AA17204058-12); Guangxi Science and Technology Base and Special Fund for Talent(AD17195014); Key Scientific and Technological Program of Guilin City(20150121); Basic Research Business Foundation of Guangxi Academy of Sciences(2018YJJ905); Basic Research Business Foundation of Guangxi Institute of Botany(15010,180016); Autonomous Foundation of Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization(ZRJJ2017-9)]。 |
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| Effects of environmental factors and shell-breaking treatment on germination characteristics of Castanea henryi seeds |
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LI Jitao1,2, CHEN Zongyou1,2*, TANG Hui1,2, WANG Manlian2, WEI Xiao2
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1. Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Guangxi Institute of Botany, Guangxi Zhuang
Autonomous Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China;2. Guangxi Institute of Botany,
Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China
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| Abstract: |
| Castanea henryi has very high edible and medicinal values, which is an important woody grain and a characteristic fruit tree resource in South China. In order to find out the best treatment strategy to improve the germination rate of C. henryi seeds, and provide scientific references for its exploration and utilization, effects of temperature, light, matrix, matrix moisture and shell-breaking treatment on seed germination of C. henryi were investigated. The results were as follows:(1)The suitable temperature for germination was 25 ℃, the final germination percentage was 92.67%, and the germination percentage under other temperature conditions decreased, but had no significant differences with that under 25 ℃.(2)The germination percentage and germination energy under the dark regime was significantly higher than that under alternating light regime, but the root length under alternating light regime was significantly longer than that under the dark regime.(3)Peat soil had the best effect on seed germination and seedling growth, the germination percentage and germination energy in peat soil were higher than that in sand, and the root length in peat soil was significantly longer than that in sand.(4)The matrix moistures had no significant effect on seed germination percentage and germination energy.(5)The mechanical barrier of seed shell was one of the limiting factors of seed germination. After shell-breaking treatment, the seed germination energy and root length were significantly different from those without shell-breaking. Shell-breaking treatment could accelerate seed germination in actual production. |
| Key words: Castanea henryi, seed, environmental factors, shell-breaking treatment, germination |
