Improved waterlogging tolerance of barley (Hordeum vulgare) by pretreatment with ethephon
| Autor: | Masato Ejiri, Sumiyo Yamada, Kana Shimizu, Katsuhiro Shiono |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Ethylene education lcsh:Plant culture 01 natural sciences Aerenchyma chemistry.chemical_compound ethylene deoxygenated stagnant agar nutrient solutions lcsh:SB1-1110 barley (hordeum vulgare) adventitious root biology hypoxia fungi Hypoxia (environmental) food and beverages 04 agricultural and veterinary sciences biology.organism_classification Anoxic waters waterlogging Horticulture chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries aerenchyma Hordeum vulgare Plant hormone Aeration Agronomy and Crop Science 010606 plant biology & botany Ethephon |
| Zdroj: | Plant Production Science, Vol 22, Iss 2, Pp 285-295 (2019) |
| DOI: | 10.6084/m9.figshare.7770797.v1 |
| Popis: | Root growth into hypoxic or anoxic waterlogged soil relies on internal aeration in plants. The plant hormone ethylene helps adapt to waterlogging by inducing the formation of aerenchyma, which provides a low-resistance pathway for the transport of oxygen from the shoot to the root apex. Waterlogging-susceptible crops including barley start to form aerenchyma after suffering waterlogging stress. But waterlogging can be fatal if aerenchyma formation is not fast enough. Here, we investigated whether pre-treating barley with ethephon, an ethylene-releasing agrochemical, could improve its tolerance to mimicked waterlogging conditions (using stagnant deoxygenated agar nutrient solution). In barley growing in aerated nutrient solution, ethephon treatment enhanced aerenchyma formation at the root tips and induced the development of shorter and shallower roots. Pre-treating barley leaves also delayed waterlogging-caused whiting and increased the percentages of viable root-tips under waterlogging conditions. However, the pretreatment did not noticeably increase fresh weight or shoot length. Further studies are needed to optimize ethephon treatment conditions to improve barley production under waterlogged conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|