Adventitious root formation of two <Emphasis Type="Italic">Abies</Emphasis> species on log and soil in an old-growth subalpine forest in central Japan |
| |
| Authors: | Yusuke Doi Akira S Mori Hiroshi Takeda |
| |
| Institution: | (1) Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan;(2) Forest Ecology Lab, School of Resource and Environmental Management, Simon Fraser University, 8888 University Drive, Burnaby, V5A 1S6, Canada |
| |
| Abstract: | We assessed stem burial and adventitious root formation of two late-successional species, Abies
mariesii and A. veitchii, in central Japan. In a plot (5 × 5 m), all seedlings between 8 and 24 cm tall were excavated: six A. mariesii seedlings in soil, and six and four A. veitchii seedlings in soil and on logs, respectively. For each sampled seedling, the number of terminal bud scars (TBS) was counted
on the aboveground and belowground stems. Stem length was measured, and divided into aboveground and belowground stems. Among
the three groups (A. mariesii seedlings in soil and A. veitchii seedlings in soil or on logs), there was no significant difference in height or total root weight (sum of adventitious roots
and primary roots), but diameter at ground level and number of TBS were significantly different. Counting TBS on the aboveground
stem of seedlings in soil underestimated seedling age, whereas the estimate was much closer to the true age for seedlings
on logs. Seedlings in soil formed more adventitious roots than seedlings on logs. A large proportion of the stem was buried
in humus for seedlings in soil, while most of the stem was not buried in humus for seedlings on logs. These results suggest
that substrate affects adventitious root formation, the formation of which is important to shade tolerance. Thus, our preliminary
results suggest that consideration of adventitious root formation is necessary to understand seedling bank dynamics and estimate
seedling ages of these Abies species in spatially heterogeneous old-growth subalpine forests. |
| |
| Keywords: | Abies species Adventitious root Log substrate Subalpine forest Terminal bud scar |
| 本文献已被 SpringerLink 等数据库收录！ |
|
