| 摘要: |
| 为明确‘迪庆苦荞'和‘黑丰一号'苦荞的水分敏感时期,及其合理灌溉、稳产栽培、节水生产,该文以‘迪庆苦荞'和‘黑丰一号'苦荞为试验材料,采用盆栽人工控水试验,研究了苗期、花期、成熟期干旱胁迫(S)对其生长及生理特性的影响。结果表明:(1)干旱胁迫显著影响了这两种苦荞的生长,表现为株高、茎粗、叶面积、茎叶干重、根系体积、根系表面积、根系平均直径、根系干重、根系活力、根系可溶性蛋白含量均显著低于对照(CK); 根系超氧化物歧化酶(SOD)、过氧化物酶(POD)、丙二醛(MDA)、游离脯氨酸含量显著高于对照处理,干旱胁迫下‘迪庆苦荞'比‘黑丰一号'表现更优。(2)不同生育时期干旱胁迫对这两种苦荞各指标的影响程度表现为花期>苗期>成熟期; 花期干旱胁迫对茎叶干重的影响最大,花期干旱胁迫与对照相比,‘迪庆苦荞'和‘黑丰一号'的茎叶干重分别降低了44.47%、51.04%。综上所述,干旱影响了这两种苦荞的生长,花期干旱胁迫对其影响最大,‘迪庆苦荞'在干旱胁迫下生长较好,受到的影响较小,所以,在生产实践中,应注意苦荞花期水分的及时供应。 |
| 关键词: ‘迪庆苦荞', ‘黑丰一号'苦荞, 干旱胁迫, 不同生育期, 生长生理特性 |
| DOI：10.11931/guihaia.gxzw201912010 |
| 分类号:Q945 |
| 文章编号:1000-3142(2021)06-0970-09 |
| Fund project:国家自然科学基金(31571604); 山西师范大学现代文理学院基础研究项目(2019JCYJ16)[Support by the National Natural Science Foundation of China(31571604); Basic Research Project of College of Modern Arts and Science, Shanxi Normal University(2019JCYJ16)]。 |
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| Effects of drought stress on growth and physiological characteristics of Fagopyrum tataricum ‘Diqing' and F. tataricum‘Heifeng 1' at different growth stages |
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DONG Fuhui2, PEI Hongbin1,2*, ZHANG Yongqing2,3, YANG Tian2, YANG Qian2
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1 . College of Modern Arts and Sciences, Shanxi Normal University, Linfen 041004, Shanxi, China;2. College of Life Sciences,
Shanxi Normal University, Linfen 041004, Shanxi, China;3. College of Geographical Sciences,
Shanxi Normal University, Linfen 041004, Shanxi, China
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| Abstract: |
| In order to understand its sensitive period of humidity, reasonable irrigation, stable production cultivation, and water-saving production of Fagopyrum tataricum ‘Diqing' and F. tataricum ‘Heifeng 1', we took F. tataricum ‘Diqing' and F. tataricum ‘Heifeng 1' as the experimental materials, artificial water control was carried out in the pot experiment to study the effects of drought stress on the two kinds of F. tataricum growth and physiological characteristics in seedling, blooming and mature stages. The results were as follows:(1)Drought stress significantly affected the growth of the two kinds of F. tataricum, especially for plant height, stem diameter, leaf area, shoot-leaf dry weight, root volume, root surface area, root average diameter, root dry weight, root activity, soluble protein content. These indexes are significantly lower than those in the control group. However, the contents of superoxide dismutase(SOD), peroxidase(POD), malondialdehyde(MDA)and free proline content in root system were significantly higher than those in control group. Fagopyrum tataricum ‘Diqing' had better performance than F. tataricum ‘Heifeng 1' under drought stress.(2)The effects of drought stress on the two kinds of F. tataricum at different growth stages were blooming stage > seedling stage > mature stage. Drought stress at blooming stage had the greatest effect on shoot-leaf dry weight. Compared with the control group, shoot-leaf dry weight of F. tataricum ‘Diqing' and F. tataricum ‘Heifeng 1' decreased by 44.47% and 51.04% respectively. It can be concluded that drought affects the growth of these two kinds of F. tataricum, and the greatest impact on the growth of these two kinds of F. tataricum at blooming stage; while under drought stress, drought-tolerant F. tataricum ‘Diqing' grows better and is less affected. Therefore, in the production practice, it is necessary to timely supply water to F. tataricum at blooming stage. |
| Key words: Fagopyrum tataricum ‘Diqing', F. Tataricum ‘Heifeng 1', drought stress, different growth stags, growth physiological characteristics |
