TONG Jiayun,LAN Tian,REN Xiaoxiang.Effect of Drought or Salt Stress on the Germination Characteristics of Physalis alkekengi Seed[J].Northern Horticulture,2016,40(11):151-154.[doi:10.11937/bfyy.201611040]
干旱及盐胁迫对酸浆种子萌发特性的影响
- Title:
- Effect of Drought or Salt Stress on the Germination Characteristics of Physalis alkekengi Seed
- Keywords:
- Physalis alkekengi; seed germination; drought stress; salt stress
- 文献标志码:
- A
- 摘要:
- 以酸浆种子为试材，分别采用浓度为0%~25.0%的PEG-6000模拟干旱胁迫，同时用0~150 mmol?L-1 NaCl溶液模拟盐分胁迫，分别考察酸浆种子的抗旱和抗盐萌发特性。结果表明：随着PEG浓度增加，酸浆种子萌发延迟，且发芽率、发芽势和发芽指数均呈现明显下降趋势，PEG达25.0%时，酸浆种子没有萌发；临界胁迫浓度C50为12.3%，高于番茄种子C50（8.0%~10.8%）。随着NaCl溶液浓度升高，酸浆种子的发芽率、发芽势、发芽指数也呈下降趋势；浓度达到150 mmol?L-1时，种子发芽率比对照组降低43.0%，萌发种子不能发育为正常幼苗；其C50为107.0 mmol?L-1，低于向日葵种子的C50（258.0 mmol?L-1）。
- Abstract:
- Germination tests of Physalis alkekengi seed under drought or salt stress were conducted，using different concentration of solution(0%-25.0% polyethylene glycol-6000 or 0-150 mmol?L-1 NaCl stress，respectively) as substitutes for water.The results showed that the seed germination was delayed and the germination percentage(GP)，germination energy(GE) and germination index(GI) were significantly declined as the PEG concentration increasing.No germination was observed when PEG concentration was 25.0%.The C50(critical stress concentration) of PEG-6000 was 12.3%，which was higher than tomato seeds(8.0%-10.8%).The GP，GE and GI were also significantly declined as the NaCl concentration increasing.The GP was lowered by 43.0% when NaCl concentration was 150 mmol?L-1，and the sprouted seeds were failed to develop into seedlings.The C50 of NaCl was 107.0 mmol?L-1，which was lower than sun flower seeds(258.0 mmol?L-1).
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备注/Memo
第一作者简介：童家赟（1979-），男，博士，讲师，现主要从事中药鉴定教学与科研及药用植物保护与繁育等研究工作。E-mail：tongjy@gzucm.edu.cn.基金项目：广州中医药大学“青年英才培养工程”资助项目(QNYC20140113)；国家自然科学基金资助项目（31401277）。