| 盐胁迫对石竹种子萌发和幼苗生长的影响 |
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| 引用本文： | 黄勇,郭猛,张红瑞,周艳,李贺敏,高致明,王盼盼.盐胁迫对石竹种子萌发和幼苗生长的影响[J].草业学报,2020,29(12):105-111. |
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| 作者姓名： | 黄勇 郭猛 张红瑞 周艳 李贺敏 高致明 王盼盼 |
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| 作者单位： | 河南农业大学农学院，河南 郑州 450046 |
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| 基金项目： | 河南道地药材栽培示范园项目(30801395) |
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| 摘 要： | 通过对不同浓度盐胁迫下石竹种子萌发特性、幼苗生长和生理特性等指标的测定，研究盐胁迫对石竹种子萌发、幼苗生长的影响。结果表明：50 mmol·L-1盐胁迫对石竹种子萌发无显著影响，100、150、200和250 mmol·L-1盐胁迫显著抑制石竹种子发芽，且浓度增加抑制作用变强。50、100和150 mmol·L-1盐胁迫对植株幼苗茎粗有显著促进作用，200 mmol·L-1盐胁迫对茎粗影响不显著，250 mmol·L-1盐胁迫显著抑制茎粗生长；叶长、叶宽、根长和单株干重在50 mmol·L-1盐胁迫下正常生长，在其余胁迫处理下被显著抑制。幼苗游离脯氨酸、可溶性蛋白和丙二醛的含量随盐胁迫浓度的增加而升高，可溶性糖含量、过氧化物酶和过氧化氢酶活性随盐胁迫浓度的增加呈先升高后下降的趋势，可溶性糖含量在100 mmol·L-1盐胁迫下含量达到最高，过氧化物酶和过氧化氢酶活性在150 mmol·L-1盐胁迫下活性最大，盐胁迫显著抑制超氧化物歧化酶活性。石竹有一定的抗盐胁迫能力，可在50 mmol·L-1盐胁迫下正常萌发生长，高浓度盐胁迫下石竹种子萌发和幼苗生长受到抑制。
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| 关 键 词： | 盐胁迫 石竹 种子 萌发特性 幼苗生长 生理特征 |
| 收稿时间： | 2020-01-20 |
| 修稿时间： | 2020-03-24 |
Effects of salt stress on seed germination and seedling growth of carnation |
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| Yong HUANG,Meng GUO,Hong-rui ZHANG,Yan ZHOU,He-min LI,Zhi-ming GAO,Pan-pan WANG.Effects of salt stress on seed germination and seedling growth of carnation[J].Acta Prataculturae Sinica,2020,29(12):105-111. |
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| Authors: | Yong HUANG Meng GUO Hong-rui ZHANG Yan ZHOU He-min LI Zhi-ming GAO Pan-pan WANG |
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| Institution: | College of agriculture，Henan Agricultural University，Zhengzhou 450046，China |
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| Abstract: | In this study， we determined the effects of salt stress on the seed germination， seedling growth， and physiological characteristics of carnation （Dianthus chinensis）. The results showed that 50 mmol·L–1 NaCl had no significant effect on the germination of carnation seeds， while NaCl at 100， 150， 200 and 250 mmol·L–1 significantly inhibited the germination of carnation seeds， and the inhibition became stronger with increasing NaCl concentrations. The stem diameter was significantly increased in the 50， 100 and 150 mmol·L–1 NaCl treatments， unaffected in the 200 mmol·L–1 treatment， and significantly decreased in the 250 mmol·L–1 NaCl treatment， compared with the control. The leaf length， leaf width， root length， and dry weight per plant were not affected by NaCl at 50 mmol·L–1， but were significantly inhibited by NaCl at higher concentrations. The contents of free proline， soluble protein， and malondialdehyde increased with increasing NaCl concentrations. The contents of soluble sugars and hydrogen peroxide and the activity of peroxidase first increased and then decreased with increasing NaCl concentrations. The highest soluble sugars content was in the 100 mmol·L–1 NaCl treatment， and the highest hydrogen peroxide content and peroxidase activity were in the 150 mmol·L–1 NaCl treatment. All the NaCl treatments significantly inhibited superoxide dismutase activity. Our results indicated that D. chinensis is partially salt tolerant. It can germinate and grow normally under 50 mmol·L–1 NaCl stress， but NaCl at higher concentrations inhibits its seed germination and seedling growth. |
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| Keywords: | salt stress Dianthus chinensis seed germination characteristics seedling growth physiological characteristics |
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