Study on Seed Germination Characteristics and Seedling Drought Resistance of Kengyilia thoroldiana from Different Collection Sites

doi:10.11733/j.issn.1007-0435.2025.12.022

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (12): 4098-4108.DOI: 10.11733/j.issn.1007-0435.2025.12.022

• 2025-12-28 • Previous Articles

Study on Seed Germination Characteristics and Seedling Drought Resistance of Kengyilia thoroldiana from Different Collection Sites

LYU Liang-yu^1,2,3, SHI Jian-jun^1,2,3, CAI Zong-cheng^1,2, BAO Shan-cun^1,2, GAO Pei^1,2, LI Fa-yi^1,2, FU Shou-quan¹, HAN Wen¹

1. College of Animal Science and Veterinary Science, Qinghai University, Xining, Qinghai Province 810016, China;
2. State Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry Jointly Established, Qinghai University, Xining, Qinghai Province 810016, China;
3. Key Laboratory of Adaptive Management of Alpine Grassland in Qinghai Province, Xining, Qinghai Province 810016, China

Received:2025-01-02 Revised:2025-02-15 Published:2025-12-01

不同采集地梭罗草种子萌发特征和幼苗抗旱性研究

吕亮雨^1,2,3, 施建军^1,2,3, 蔡宗程^1,2, 保善存^1,2, 高佩^1,2, 李发毅^1,2, 付守全¹, 韩玟¹

1. 青海大学畜牧兽医科学院, 青海西宁 810016;
2. 青海大学省部共建三江源生态与高原农牧业国家重点实验室, 青海西宁 810016;
3. 青海省高寒草地适应性管理重点实验室, 青海西宁 810016

通讯作者: 施建军，E-mail：378605242@qq.com
作者简介:吕亮雨（1997-），男，汉族，山东烟台人，博士研究生，主要从事牧草栽培研究，E-mail：1670240560@qq.com；
基金资助:
青海省林草局项目-沱沱河梭罗草原种繁育技术示范（青2024TG02）；青海省科技特派员专项（2024-NK-P24）资助

Abstract

Abstract: In order to explore the effects of water stress on the seed germination and seedling growth of Kengyilia thoroldiana， this study used seeds of four geographical populations of K. thoroldiana in Qinghai Province as the research object， and the physiological indexes of seed germination and seedling growth of K. thoroldiana were determined by simulating water stress environment with different PEG concentrations. The results showed that the seed germination and seedling growth of K. thoroldiana were inhibited under drought stress. With the increase of drought stress， the seed germination rate， germination index， seedling height and radicle length of K. thoroldiana decreased continuously. Under mild drought stress （-0.2 MPa， -0.4 MPa）， the germination rate， germination rate， germination index and simplified vigor index were all higher， and the seedlings grew and developed faster. Waterlogging （0.0 MPa） or drought （-0.8 MPa， -1.0 MPa， -1.2 MPa） inhibited seed germination and seedling growth. Correlation analysis showed that except for malondialdehyde， the other 14 seed germination and seedling growth related indexes were positively correlated. The evaluation of Fuzzy membership function analysis showed that the order of seed germination ability of K. thoroldiana from strong to weak was Tanggula Mountain Town > Qumahe Township > Huashixia Township > Shanglaxiu Township.

Key words: Kengyilia thoroldiana, Osmotic stress, Germination index, Growth indicators, Fuzzy membership function

摘要： 为探究水分胁迫对梭罗草（Kengyilia thoroldiana）种子萌发和幼苗生长的影响，本研究以青海省4个地理种群梭罗草种子为研究对象，采用不同PEG浓度溶液模拟水分胁迫环境，测定4个采集地梭罗草种子萌发和幼苗生长生理相关指标。结果表明，干旱胁迫下4个采集地梭罗草种子萌发和幼苗生长发育均受到抑制，随干旱胁迫程度增加，梭罗草种子发芽率、发芽指数及幼苗高度和胚根长度不断降低。轻度干旱胁迫（-0.2 MPa，-0.4 MPa）时，萌发速率、发芽率、发芽指数和简化活力指数均较高，幼苗生长发育较快；水涝（0.0 MPa）或干旱（-0.8 MPa，-1.0 MPa，-1.2 MPa）抑制种子萌发和幼苗生长。相关性分析表明，除丙二醛外，其余14种种子萌发和幼苗生长相关指标之间均呈正相关关系。隶属函数评价表明，4个采集地梭罗草种子萌发能力由强到弱依次为：唐古拉山镇>曲麻河乡>花石峡乡>上拉秀乡。

关键词: 梭罗草, 干旱胁迫, 萌发指数, 生长指标, 隶属函数

CLC Number:

S543.9

LYU Liang-yu, SHI Jian-jun, CAI Zong-cheng, BAO Shan-cun, GAO Pei, LI Fa-yi, FU Shou-quan, HAN Wen. Study on Seed Germination Characteristics and Seedling Drought Resistance of Kengyilia thoroldiana from Different Collection Sites[J]. Acta Agrestia Sinica, 2025, 33(12): 4098-4108.

吕亮雨, 施建军, 蔡宗程, 保善存, 高佩, 李发毅, 付守全, 韩玟. 不同采集地梭罗草种子萌发特征和幼苗抗旱性研究[J]. 草地学报, 2025, 33(12): 4098-4108.

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Study on Seed Germination Characteristics and Seedling Drought Resistance of Kengyilia thoroldiana from Different Collection Sites

不同采集地梭罗草种子萌发特征和幼苗抗旱性研究

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