不同浓度NaCl处理对灰绿藜种子萌发及幼苗生长发育的影响

doi:10.7525/j.issn.1673-5102.2019.05.010

摘要/Abstract

摘要： 灰绿藜是广泛分布于中低度盐碱地的一年生经济盐生植物。通过系统研究不同浓度NaCl处理对灰绿藜种子萌发、幼苗生长发育以及根、茎和叶中Na⁺浓度的影响，初步阐明灰绿藜对不同浓度NaCl处理的响应机制。结果表明，与对照相比，随着NaCl浓度的增大，灰绿藜的种子萌发率和单位时间内种子萌发数量均呈下降趋势，种子的萌发时间也会相应延长，种子在500 mmol·L^-1 NaCl处理下基本不萌发。最适合灰绿藜幼苗生长的浓度是50 mmol·L^-1，其次是0和100 mmol·L^-1。高浓度（大于200 mmol·L^-1） NaCl处理过的灰绿藜植株的开花（结果）早于未处理或低浓度（50-150 mmol·L^-1） NaCl处理。随着基质中NaCl浓度的升高，植株的Na⁺泌出量也呈上升趋势，其中叶片泌出量的增加最为明显，在处理浓度升高至200 mmol·L^-1时达到最高值。

关键词: 灰绿藜, NaCl胁迫, Na⁺, 植株生长, 盐渍化

Abstract: Chenopodium glaucum L. is an annual economic halophyte widely distributed in middle and low saline-alkali land. In order to elucidate the response of C.glaucum L. to different contents of NaCl treatment, we studied the effect of seed germination and seeding growth and Na⁺ content in roots, stems and leaves of the plants under different NaCl contents. With the increase of NaCl, the seed germination rate and the number of seed germination per unit time were declining, and the germination time of the seeds were prolonging compared with the control group. The seeds did not germinate under 500 mmol·L^-1 NaCl and the optimum content for germination was 50 mmol·L^-1, followed by control and 100 mmol·L^-1 NaCl. The plants treated with high bloom(fructify) sooner than the untreated or low concentration treatment. With the increase of the NaCl in substrate, the amount of Na⁺ secreted in plants showed an upward trend and reached the highest value when the treatment concentration increased to 200 mmol·L^-1, evidently in leaves.

Key words: Chenopodium glaucum L., NaCl stress, Na⁺, plant growth, salinization

中图分类号:

Q949.745.1

任家博, 闻志彬. 不同浓度NaCl处理对灰绿藜种子萌发及幼苗生长发育的影响[J]. 植物研究, 2019, 39(5): 716-721.

REN Jia-Bo, WEN Zhi-Bin. Effect of different NaCl contents on Seed Germination and Seeding Growth of Chenopodium glaucum L.[J]. Bulletin of Botanical Research, 2019, 39(5): 716-721.

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