XIAO Jiujun,ZHAO Xiaopeng,CHEN Yang,et al.Effects of Dry Heat Shock Treatment on Seed Germination Characteristics of Coriaria nepalensis Wall.Adapted to the Karst Rocky Desertification Environment[J].Northern Horticulture,2022,(16):76-82.[doi:10.11937/bfyy.20220509]
干热冲击处理对石漠化环境适生树种马桑种子萌发特性的影响
- Title:
- Effects of Dry Heat Shock Treatment on Seed Germination Characteristics of Coriaria nepalensis Wall.Adapted to the Karst Rocky Desertification Environment
- 文献标志码:
- A
- 摘要:
- 以中国西南石漠化地区环境适宜性树种马桑（Coriaria nepalensis Wall.）种子为试材，采用室内干热冲击处理方法，研究了萌发前干热冲击处理对种子萌发特性的影响，探讨植物对高温长期干扰的适应进化，以期为利用马桑开展石漠化地区生态恢复提供参考依据。结果表明：1）相比对照，60 ℃（10、20、30 min）和40 ℃（40、60 min）5种干热冲击处理对马桑种子萌发有显著的促进作用，能够缩短萌发的开始时间、结束时间、持续时间，提高萌发率、萌发势和萌发指数，其中60 ℃（20 min）干热冲击处理促进效果最佳，表明短时间高强度干热冲击能一定程度上促进马桑种子萌发。2）80 ℃干热冲击处理对马桑种子萌发除了能够显著缩短萌发开始时间外有小幅抑制作用或略微促进，表明马桑种子不能承受高强度和长时间干热冲击。3）不同温度处理的时间效应存在一定差异，40 ℃干热处理所需的处理时间显著高于60 ℃和80 ℃，而高温干热冲击处理则效果不佳，表明马桑种子可以承受较高强度瞬时干热冲击，并在低强度适度时间干热冲击下种子萌发能力得到提升。综上所述，马桑种子具有明显的热冲击效应，经适当温度和时间的干热冲击处理能够促进马桑种子萌发能力，缩短萌发时间，提高萌发率、萌发势和萌发指数，初步揭示了马桑种子在高温条件下的萌发适应特征。
- Abstract:
- Coriaria nepalensis Wall,an environmentally suitable tree species in rocky desertification areas of southwest China seeds were used as test materials,and the indoor dry thermal shock treatment method was used to study the effect of dry thermal shock treatment before germination on seed germination characteristics,and to explore the adaptive evolution of plants to the long-term interference of high temperature,in order to provide reference for the use of masang to carry out ecological restoration in rocky desertification areas.The results showed that,1) Compared with the control,5 dry heat shock treatments at 60 ℃ (10,20,30 minutes) and 40 ℃ (40,60 minutes) significantly promoted seed germination.These treatments could shorten the plants′ germination start time,germination end time,germination duration,and increase germination rate,germination potential and germination index.Among them,60 ℃ (20 minutes) dry heat shock treatment had the best promoting effect,which indicated that short time and high intensity dry heat shock could promote seed germination to a certain extent.2) The dry heat shock treatment at 80 ℃ had a small inhibitory effect or a slight promoting effect on the germination of Coriaria nepalensis seeds except that the germination initiation time was significantly shortened,indicating that Coriaria nepalensis seeds could not withstand high intensity and long time dry heat shock.3) There are some differences in the time required for different temperature treatments.The time required of dry heat treatment at 40 ℃ was significantly higher than that at 60 ℃ and 80 ℃,while the effect of dry heat shock treatment at high temperature was not good,indicating that the seeds could withstand high intensity instantaneous dry heat shock.The germination ability of seeds was improved under low intensity and moderate time dry heat shock.In conclusion,the seeds of Coriaria nepalensis had obvious thermal shock effect,and the dry and thermal shock treatment at appropriate temperature and time could promote the germination ability of Coriaria nepalensis seeds,and could shorten the germination time and improve the germination rate,germination potential and germination index,which preliminarily revealed the germination adaptation characteristics of Coriaria nepalensis seeds under high temperature conditions.
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备注/Memo
第一作者简介：肖玖军（1983-），男，硕士，高级工程师，现主要从事土地资源与林学等研究工作。E-mail：xiaojiujun0504@163.com.责任作者：邢丹（1983-），女，博士，研究员，现主要从事石漠化植被恢复等研究工作。E-mail:2004xingdan@163.com.基金项目：国家自然科学基金资助项目（32060377）；贵州省科技支撑计划资助项目（黔科合支撑［2021］一般496号）；贵州省基础研究计划资助项目（黔科合基础-ZK［2022］一般276号）；贵州省林业科研课题资助项目（黔林科合［2017］08号）。收稿日期：2022-02-14