野生薄皮木种子萌发特性及耐盐性研究  

Seed Germination Characteristics and Salt Resistance of Wild Leptodermis oblonga Bunge

作　　者：郭丽[1] 索素敏 杨红丽[1] 徐明辉[1] 常介田[1] GUO Li;SUO Sumin;YANG Hongli;XU Minghui;CHANG Jietian(Henan Vocational College of Agriculture,Zhongmu 451450,China;Forestry General Station of Tangyin,Tangyin 456150,China)

机构地区：[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

出　　处：《河南农业科学》2022年第8期128-133,共6页Journal of Henan Agricultural Sciences

基　　金：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)。

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,GA_(3)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;GA_(3)处理能有效促进种子萌发,1.5 mg/L GA_(3)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。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,GA_(3) 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.GA_(3) 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.

关 键 词：薄皮木 种子萌发 GA3 耐盐性 

分 类 号：S688[农业科学—观赏园艺]