NDLI: Effects of simulated drought stress on the fine roots of Japanese cedar (Cryptomeria japonica) in a plantation forest on the Kanto Plain, eastern Japan

Content Provider	Springer Nature Link
Author	Konôpka, Bohdan guchi, Kyotaro Sakata, Tadashi Takahashi, Masamichi Konôpková, Zuzana
Copyright Year	2007
Abstract	Drought stress was simulated in a 28-year-old Japanese cedar plantation (Kanto Plain, Japan) between April and October 2004 by removing throughfall using rain shelters. Changes in fine-root parameters caused by this drought treatment were examined by sequential soil coring. Drought effects on fine roots were analyzed separately for particular soil depths (0–5, 5–15, and 15–25 cm) and root diameters (<1 and 1–2 mm). Generally, fine-root biomass and root tip numbers decreased by the drought treatment. Drought stress was most intense for fine roots in the topsoil and weakest for fine roots in the deepest soil layer. Fine roots less than 1 mm in diameter were affected more severely than 1- to 2-mm roots. The effect of drought treatment was most remarkable for the number of white root tips, which decreased to 17% of the control at the soil depth of 0–5 cm. These results suggest that white root tip is the most suitable indicator of drought stress. Simulated drought reduced production of fine roots less than 1 mm and 1–2 mm in diameter. Fine-root mortality was stimulated for roots less than 1 mm, but not for 1- to 2-mm roots. These results suggest that fine roots with larger diameters can survive drought stress at a level simulated in this study, but processes of fine-root production were inhibited regardless of the diameter classes. The duration of drought stress and phenology of fine roots should also be considered in diagnosing the effects of drought on fine-root parameters.
Starting Page	143
Ending Page	151
Page Count	9
File Format	PDF
ISSN	13416979
Journal	Journal of Forest Research
Volume Number	12
Issue Number	2
e-ISSN	16107403
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-04-02
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Drought Fine-root mass Mortality Production Root tips Forestry Forestry Management Tree Biology Plant Sciences Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Forestry

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