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American Journal of Plant Physiology
  Year: 2020 | Volume: 15 | Issue: 1 | Page No.: 41-51
DOI: 10.3923/ajpp.2020.41.51
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Morpho-Physiological Responses of Quinoa (Chenopodium quinoa Willd.) Varieties to Salinity in a Hydroponic System

Sirpaul Jaikishun , Peng Gang, Shikui Song and Zhenbiao Yang

Background and Objective: Among the abiotic stresses, salinity probably has the most deleterious effect on plant growth and productivity. This study was aimed to assess the responses of eight C. quinoa varieties to different NaCl concentrations (200, 300, 400 and 500 mM NaCl ) and CK (control) in hydroponics. Materials and Methods: Morphological features assessed were relative growth (height), dry biomass of shoots and roots, relative chlorophyll content, yield while the physiological parameters were stomatal conductance, net photosynthesis, transpiration rate, intrinsic water use efficiency, intercellular CO2 concentration and relative water content. Application of one-way ANOVA and Tukey analysis determined the significance of the responses among the treatments and varieties. Results: The results indicated that a significant difference (p = 1.48E-10) existed in relative growth (height) among the varieties with a consistent increase in salinity as compared to the CK at p<0.05. A >50% reduction in stomatal conductance was observed between the CK and 500 mM NaCl and a significant difference (p = 9.84E-12) was identified among the treatments. The highest respiratory and net photosynthesis rates were found in CKs for all the varieties with a significant difference (p = 7.86E-07) among the treatments at p<0.05. Moreover, yield decreased significantly after 200 mM NaCl with ~ 80% at 300 and 400 mM NaCl relative to the CK. Conclusion: The varieties displayed tolerance to high salinity concentration, even though their responses were differential, they all produced viable seeds. Hence, they can be used in future breeding programs to enhance the growth and development of other varieties in highly saline soils.
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How to cite this article:

Sirpaul Jaikishun, Peng Gang, Shikui Song and Zhenbiao Yang, 2020. Morpho-Physiological Responses of Quinoa (Chenopodium quinoa Willd.) Varieties to Salinity in a Hydroponic System. American Journal of Plant Physiology, 15: 41-51.

DOI: 10.3923/ajpp.2020.41.51






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