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Effects of saline-alkali stress on seed germination of Haloxylon ammodendron and Nitraria roborowskii Kom in Qaidam Basin
Acta Agriculturae Scandinavica Section B, Soil and Plant Science ( IF 1.6 ) Pub Date : 2021-03-15 , DOI: 10.1080/09064710.2021.1897157
Te Xu 1 , Kangning He 1 , Hui Wang 1 , Weilu Wang 1 , Tan Zhang 1
Affiliation  

ABSTRACT

Haloxylon ammodendron and Nitraria roborowskii Kom are dominant groups characterised in Qaidam Basin. Elucidating the salt-tolerant mechanism of these two plants, which can grow successfully in this desert area affected by salinity and alkalinity, contributes to the protection and restoration of local vegetation. In this paper, seed germination feature responses in saline-alkali conditions were tested. H. ammodendron seeds retained 72% of germination percentage (GP) under high salinity up to 500 mmol L−1 saline solution and other germination parameters showed a significant decrease under increasing salinity without alkaline stress (P < 0.05). GP of N. roborowskii Kom was significantly accelerated from 0 to 200 mmol L−1 saline solution (P < 0.05), while other germination parameters were significantly accelerated from 0 to 100 mmol L−1 saline solution without alkaline stress (P < 0.05). Germination parameters of H. ammodendron under low concentration (concentration < 300 mmol L−1) alkali stress (pH < 8.78) were accelerated than non-alkali stress. Germination parameters of N. roborowskii Kom seeds were significantly inhibited under alkali stress (P < 0.05); moreover, the facilitation of low salinity was diminished by alkali stress (P < 0.05). The regression models of germination parameters and salinity under different pH values presented cubic curves, quadratic curves, and linear model and all models were significant (P < 0.05) in both plants.



中文翻译:

盐碱胁迫对柴达木盆地梭梭和白刺种子萌发的影响

摘要

梭梭Nitraria roborowskii Kom是柴达木盆地的优势群落。阐明这两种植物的耐盐机制,可以在这片受盐碱影响的沙漠地区成功生长,有助于当地植被的保护和恢复。本文测试了盐碱条件下种子萌发特征响应。H. ammodendron种子在高达 500 mmol L -1盐水溶液的高盐度下保留了 72% 的发芽率(GP),其他发芽参数在无碱胁迫的情况下随着盐度的增加而显着降低(P  < 0.05)。N. roborowskii Kom 的全科医生0 至 200 mmol L -1盐水溶液显着加速(P  < 0.05),而其他发芽参数从 0 至 100 mmol L -1盐水溶液无碱胁迫显着加速(P  < 0.05)。H. ammodendron在低浓度(浓度 < 300 mmol L -1)碱胁迫(pH < 8.78)下的萌发参数比非碱胁迫加速。N. roborowskii Kom种子的萌发参数在碱胁迫下受到显着抑制(P  < 0.05);此外,碱胁迫减弱了低盐度的促进作用(P < 0.05)。不同pH值下发芽参数和盐度的回归模型呈现三次曲线、二次曲线和线性模型,所有模型 在两种植物中均显着(P < 0.05)。

更新日期:2021-03-15
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