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Growth and annual ring structure of Larix sibirica grown at different carbon dioxide concentrations and nutrient supply rates.

Authors :
Yazaki, Kenichi
Funada, Ryo
Mori, Shigeta
Maruyama, Yutaka
Abaimov, Anatoly P.
Kayama, Masazumi
Koike, Takayoshi
Source :
Tree Physiology; Oct2001, Vol. 21 Issue 16, p1223-1229, 7p, 1 Diagram, 2 Charts, 2 Graphs
Publication Year :
2001

Abstract

We compared effects of ambient (360 vpm) and elevated (720 vpm) carbon dioxide concentration ([CO2]) and high and low nutrient supply rates on stem growth, annual ring structure and tracheid anatomy of Siberian larch (Larix sibirica Ledeb.) seedlings over two growing seasons. Elevated [CO2] had no significant effect on either stem height or diameter growth; however, both stem height and diameter growth were enhanced by the high nutrient supply rate, and these increases were stimulated by elevated [CO2]. Elevated [CO2] tended to increase the width of the annual xylem ring, the number of cells in a radial file spanning the ring, and tracheid lumen diameter, whereas it tended to reduce cell wall thickness, although there were no statistically significant CO2 effects on tracheid anatomy. Changes in tracheid cell morphology seemed to be dependent on changes in shoot elongation rates. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
0829318X
Volume :
21
Issue :
16
Database :
Complementary Index
Journal :
Tree Physiology
Publication Type :
Academic Journal
Accession number :
51808435
Full Text :
https://doi.org/10.1093/treephys/21.16.1223