Growth,morphology and photosynthetic activity in flooded <Emphasis Type="Italic">Alnus japonica</Emphasis> seedlings |
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Authors: | Fumiko Iwanaga Fukuju Yamamoto |
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Institution: | (1) Department of Forest Science, Faculty of Agriculture, Tottori University, Minami 4-101, Koyama Tottori, 680-8553, Japan |
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Abstract: | This study was conducted on Alnus japonica seedlings subjected to flooding for 2, 4, and 6 weeks to examine responses in growth, morphology, and photosynthesis to different
periods of flooding. Seedlings subjected to flooding for 2 and 4 weeks were drained after flooding then watered daily. Increases
in biomass of leaves, roots, and whole plants were less for 6-week-flooded seedlings. Rate of photosynthesis and stomatal
conductance of flooded seedlings decreased within 2 weeks. For 2-week-flooded seedlings recovery from reduced stomatal conductance
and recovery of photosynthetic activity occurred after drainage. For the 6-week-flooded seedlings stomatal conductance recovered
by the end of the experiment. Adventitious root formation by the 4 and 6-week-flooded seedlings was observed from the third
week of flooding. These results suggest that recovery of reduced function in leaves may progress with development of adventitious
roots during the period of flooding. |
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Keywords: | Adventitious roots Alnus japonica Drainage Flooding Photosynthesis |
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