NITROGEN-FIXATION ASSOCIATED WITH SAND GRAIN ROOT SHEATHS (RHIZOSHEATHS) OF CERTAIN XERIC GRASSES

被引：54

作者：

WULLSTEIN, LH

BRUENING, ML

BOLLEN, WB

机构：

[1] NW MISSOURI STATE UNIV, DEPT BIOL, MARYVILLE, MO 64468 USA

[2] OREGON STATE UNIV, DEPT MICROBIOL, CORVALLIS, OR 97331 USA

来源：

PHYSIOLOGIA PLANTARUM | 1979年 / 46卷 / 01期

关键词：

D O I：

10.1111/j.1399-3054.1979.tb03176.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Nitrogen fixation (acetylene reduction) was found to be associated with sand grain root sheaths (rhizoseaths) occurring on the following xeric grasses: Oryzopsis hymenoides (Roem. and Shult.) Ricker, Agropyron dasystachyum (Hook.) Scrib., Stipa comata Trin. and Rupr., and Aristida purpurea Nutt. Acetylene reduction rates associated with whole plant specimens of these species varied from 515 to 920 nmol C2H4/(g dry wt.) × (6 days). Nitrogenase activity was shown to be associated with the rhizosheaths. Bacillus polymyxa‐like nitrogen fixers were isolated from the rhizosheaths of each grass. The isolates reduced acetylene and assimilated 15N2. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：1 / 4

页数：4

共 19 条

[1] ACETYLENE-REDUCTION (NITROGEN-FIXATION) ASSOCIATED WITH CORN INOCULATED WITH SPIRILLUM [J].