Journal
PLANT GROWTH REGULATION
Volume 85, Issue 3, Pages 399-409Publisher
SPRINGER
DOI: 10.1007/s10725-018-0401-9
Keywords
Barley (Hordeum vulgare L.); Waterlogging; Adventitious root; Leaf aerenchyma; Chloroplast ultrastructure
Categories
Funding
- National Natural Science Foundation of China [31571648]
- National Barley and Highland Barley Industrial Technology Specially Constructive Foundation of China [CARS-05]
- Jiangsu Key Laboratory of Biochemistry and Biotechnology of Marine Wetland [K2016-03]
- funds institute of Agricultural Science in Jiangsu Coastal Areas [YHS201605]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Waterlogging is one of the major stresses limiting crop production worldwide. The understanding of the mechanisms of plant adaptations to waterlogging stress helps improve plant tolerance to stress. In this study, physiological responses and morpho-anatomical adaptations of seven different barley genotypes were investigated under waterlogging stress. The results showed that the waterlogging-tolerant varieties (TX9425, Yerong, TF58) showed less reduction in plant height, SPAD (soil-plant analyses development analyses) value, tillers, shoot and root biomasses than did the waterlogging-sensitive varieties (Franklin, Naso Nijo, TF57). Under waterlogging stress condition, the tolerant genotypes also showed a much larger number of adventitious roots than did the sensitive genotypes. More intercellular spaces and better integrated chloroplast membrane structures were observed in the leaves of the waterlogging-tolerant cultivars, which is likely due to increased ethylene content, decreased ABA content and less accumulation of O-2 (.-). The ability to form new adventitious roots and intercellular spaces in shoots can also be used as selection criteria in breeding barley for waterlogging tolerance.
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