河南农业科学 ›› 2022, Vol. 51 ›› Issue (8): 128-133.DOI: 10.15933/j.cnki.1004-3268.2022.08.015

• 园艺 • 上一篇    下一篇

野生薄皮木种子萌发特性及耐盐性研究

郭丽1,索素敏2,杨红丽1,徐明辉1,常介田1
  

  1. (1.河南农业职业学院,河南 中牟 451450;2.汤阴县林业总站,河南 汤阴 456150)
  • 收稿日期:2022-02-22 出版日期:2022-08-15 发布日期:2022-09-23
  • 作者简介:郭丽(1979-),女,河南开封人,副教授,硕士,主要从事园林植物资源开发与利用研究。E-mail:498553886@qq.com
  • 基金资助:
    河南省科技攻关重点研发与推广专项(212102110188);河南省高等教育教学改革研究与实践项目(2021SJGLX650);河南农
    业职业学院科研创新人才项目(HNACSRHR-2021-04)

Seed Germination Characteristics and Salt Resistance of Wild Leptodermis oblonga Bunge

GUO Li1,SUO Sumin2,YANG Hongli1,XU Minghui1,CHANG Jietian1   

  1. (1.Henan Vocational College of Agriculture,Zhongmu 451450,China;2.Forestry General Station of Tangyin,Tangyin 456150,China)
  • Received:2022-02-22 Published:2022-08-15 Online:2022-09-23

摘要: 为开发特色野生植物资源,以野生薄皮木种子为试验材料,通过设置不同处理,包括培养温度15、20、25、30、35℃和变温15℃/25℃,覆土厚度0.5、1.0、1.5、2.0、2.5、3.0 cm,GA3质量浓度0.5、1.0、1.5、2.0、3.0 mg/L,NaCl溶液50、100、150、200、250、300 mmol/L,研究野生薄皮木种子萌发特性和萌发期耐盐性。结果表明:野生薄皮木种子萌发最佳温度为25 ℃,变温15℃/25℃不利于种子萌发;种子最佳播深为1.0 cm,覆土2.5 cm以上种子不出苗;GA3处理能有效促进种子萌发,1.5 mg/L GA3为野生薄皮木种子发芽最佳浓度。50~100 mmol/L NaCl环境下幼苗正常生长,150 mmol/L NaCl开始抑制幼苗生长,表明种子对低浓度NaCl胁迫有一定的适应能力,高浓度NaCl胁迫则引起植株死亡或种子不能萌芽。

关键词: 薄皮木, 种子萌发, GA3, 耐盐性

Abstract: In order to develop local characteristic wild plants,seeds of Leptodermis oblonga Bunge were used as test materials,by setting different treatments,including culture temperature of 15,20,25,30,35 ℃ and variable temperature 15℃/25℃,buried depth of 0.5,1.0,1.5,2.0,2.5,3.0 cm,GA3 mass concentration of 0.5,1.0,1.5,2.0,3.0 mg/L,NaCl solution of 50,100,150,200,250,300 mmol/L,seed germination and salt resistance during seed germination stage of Leptodermis oblonga Bunge were studied.The results showed that the best temperature for seed germination of Leptodermis oblonga Bunge was 25℃ ,and the variable temperature 15℃/25℃ was bad for seed germination. The best cover thickness of seeds was 1.0 cm,and no seedlings emerged under 2.5 cm soil. GA3 could promote seed germination,and 1.5 mg/L was the optimal concentration for germination of Leptodermis oblonga Bunge seeds.The seedlings of Leptodermis oblonga Bunge could normally grow under 50—100 mmol/L NaCl,while 150 mmol/L NaCl inhibited the growth of seedlings,indicating that the seeds had a certain ability to adapt to low⁃concentration NaCl stress,and high⁃concentration NaCl stress could cause plant death or germination failure.

Key words: Leptodermis oblonga Bunge, Seed germination, GA3, Salt resistance

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