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- Title
Xylem water-conducting patterns of 34 broadleaved evergreen trees in southern Japan.
- Authors
Umebayashi, Toshihiro; Utsumi, Yasuhiro; Koga, Shinya; Inoue, Susumu; Matsumura, Junji; Oda, Kazuyuki; Fujikawa, Seizo; Arakawa, Keita; Otsuki, Kyoichi
- Abstract
A dye injection method was used to elucidate the xylem water-conducting pathways of 34 broadleaved evergreen trees growing in southern Japan: two semi-ring-porous, 26 diffuse-porous, five radial-porous and one non-vessel species. The large earlywood vessels in semi-ring-porous species have a water transport function in only the outermost annual ring, as in deciduous ring-porous species. On the other hand, the small vessels in semi-ring-porous species maintain the water transport function in many outer annual rings. For the other xylem-type species, the many vessels in many outer annual rings have a water transport function. In diffuse-porous species, we categorized the water-conducting pattern within the annual rings into two types: d1 type, where water travels through vessels in the whole region; and d2 type, where water travels mainly through the earlywood vessels. The pattern in radial-porous species is similar to that in the d1 type; the pattern in non-vessels species is similar to that in the d2 type. The vessel diameter in radial-porous species is similar to that of the earlywood vessels of semi-ring-porous species. These results suggest that the conduit diameter size is only one of many factors determining the water-conducting pathways of broadleaved evergreen species.
- Subjects
JAPAN; XYLEM; EVERGREENS; LEAVES; POROSITY
- Publication
Trees: Structure & Function, 2010, Vol 24, Issue 3, p571
- ISSN
0931-1890
- Publication type
Article
- DOI
10.1007/s00468-010-0428-7