Xylem water-conducting patterns of 34 broadleaved evergreen trees in southern Japan

Toshihiro Umebayashi, Yasuhiro Utsumi, Shinya Koga, Susumu Inoue, Junji Matsumura, Kazuyuki Oda, Seizo Fujikawa, Keita Arakawa, Kyoichi Otsuki

Research output: Contribution to journalArticle

28 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)571-583
Number of pages13
JournalTrees - Structure and Function
Volume24
Issue number3
DOIs
Publication statusPublished - Jun 1 2010

All Science Journal Classification (ASJC) codes

  • Forestry
  • Physiology
  • Ecology
  • Plant Science

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