Source of Oxygen Fed to Adventitious Roots of Syzygium kunstleri (King) Bahadur and R.C. Gaur Grown in Hypoxic Conditions
| Autor: | Masaya Masumori, Goro Ezaki, Hong-Duck Sou, Takeshi Tange |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine chemistry.chemical_element Plant Science Biology adventitious roots Photosynthesis 01 natural sciences Oxygen 03 medical and health sciences Cutting Syzygium kunstleri Ecology Evolution Behavior and Systematics hypoxic conditions Ecology Botany water level elevation Environmental adaptation biology.organism_classification Water level Horticulture 030104 developmental biology oxygen transportation woody plants chemistry Syzygium visual_art QK1-989 visual_art.visual_art_medium Bark 010606 plant biology & botany Woody plant |
| Zdroj: | Plants Volume 9 Issue 11 Plants, Vol 9, Iss 1433, p 1433 (2020) |
| ISSN: | 2223-7747 |
| DOI: | 10.3390/plants9111433 |
| Popis: | Syzygium kunstleri, a woody plant species, adapts to hypoxic conditions by developing new adventitious roots. Here, we investigate its morphological adaptation to long-term water level changes and the sources and pathways of O2 supplied to its adventitious roots. Cuttings were cultivated in hydroponic and agar media, and then, the water level was increased by 6 cm following adventitious root emergence afterward, O2 partial pressure changes were measured using a Clark-type O2 microelectrode. O2 concentrations in the adventitious roots decreased when N2 was injected, regardless of the presence of light, indicating that the O2 source was not photosynthetic when bark was removed. New adventitious roots developed near the surface when the water level increased, and O2 conditions above the raised water level influenced O2 concentrations in adventitious roots. O2 concentrations in adventitious roots that developed before the water level increased were lower than in the newly developed adventitious roots but increased when the O2 concentrations above the original water level increased. Our study highlights morphological changes, such as the development of adventitious roots, as environmental adaptation mechanisms. By revealing O2 sources in S. kunstleri under hypoxic environments, we offer insights into the challenges of long-term adaptation to changing environments in woody plants. |
| Databáze: | OpenAIRE |
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